Vox Power VCCM600 Series User manual

VCCM600 Series
AC/DC conduction cooled configurable power supplies
User Manual
_____________________________________________________________________________________________________
VCCM600 Series User Manual | DOC6103r00 | Release date 02/03/2017
Vox Power Limited | Unit 2, Red Cow Interchange Estate, Ballymount, Dublin 22, D22 Y8H2, Ireland | T [phone] | www.vox-power.com
Cool it your way. Conduction | Convection | Forced Air
4”x7”x1.61”
SMALL
600W
POWERFUL
SILENT
FAN-LESS
The VCCM600 series user manual has been prepared by our design team to assist qualified engineers in correctly
designing in the VCCM600 product into their application to achieve the best reliability and performance possible.
All specifications are believed to be correct at time of publishing. Vox Power Ltd reserves the right to make changes to any of its products and to change or improve any part of the
specification, electrical or mechanical design or manufacturing process without notice. Vox Power Ltd does not assume any liability arising out of the use or application of any of its
products and of any information to the maximum extent permitted by law. No license, express or implied, by estoppel or otherwise, to any intellectual property rights is granted by this
document or by any products of Vox Power Ltd. VOX POWER LTD DISCLAIMS ALL WARRANTIES AND REPRESENTATIONS OF ANY KIND WHETHER EXPRESS OR IMPLIED, INCLUDING, BUT
NOT LIMITED TO, IMPLIED WARRANTIES OF SUITABILITY, FITNESS FOR PURPOSE, MERCHANTABILITY AND NONINFRINGEMENT.
Please consult your local distributor or Vox Power directly to ensure that you have the latest revision before using the product and refer to the latest relevant user manual for further
information relating to the use of the product. Vox Power Ltd products are not intended for use in connection with life support systems, human implantations, nuclear facilities or systems,
aircraft, spacecraft, military or naval missile, ground support or control equipment used for the purpose of guidance navigation or direction of any aircraft, spacecraft or military or naval
missile or any other application where product failure could lead to loss of life or catastrophic property damage. The user will hold Vox Power Ltd harmless from any loss, cost or damage
resulting from its breach of these provisions.
VCCM600 Series Overview
The VCCM600 series of conduction cooled configurable power platform delivers a silent 600 Watts and up to 750 Watts of peak power for 5
seconds in a rugged 4” x 7” package and is the ultimate power solution for applications where reliability or audible noise are of concern. The
product combines the advantages of a modular power supply with the high reliability of a fan-less architecture. Depending on your application,
the VCCM600 can be configured as a conduction, convection or forced air cooled solution and this versatility allows the unit to be seamlessly
integrated across a vast range of applications, which makes it perfect for standardising your power platform.
Designed with highest reliability and versatility in mind, the VCCM600 is suitable for applications ranging from the most controlled environments
to the harshest conditions. Each configured modular solution can accommodate up to 4 isolated DC output modules which utilize 100% SMT
components for increased reliability. Standard features include full output voltage adjust range, externally controllable voltage and current and
series & paralleling of outputs. The unique design approach and heat dissipation techniques allows the unit to be mounted in virtually any
orientation giving system designers even more flexibility. The series is approved to latest safety and EMC standards and features market leading
specifications and design in application support.

2 | Page
VCCM600 Series User Manual | DOC6103r00 | Release date 02/03/2017
Vox Power Limited | Unit 2, Red Cow Interchange Estate, Ballymount, Dublin 22, D22 Y8H2, Ireland | T [phone] | www.vox-power.com
Contents
VCCM600 Series Overview 1
Part Numbers and Ordering Information 3
Important installation information 4
Theory of Operation 5
Input Module Operation 6
Input Module Protections 7
Efficiency Performance 8
Power Ratings 9
System Cooling 9
Signalling 13
Output Module Operation (A, B, C & D) 15
Advanced Output Module Features 18
Series Connected Outputs 22
Parallel Connected Outputs 23
Mechanical Dimensions and Mounting 26
Connector details 27
Safety 28
EMC Compliance 29
Reliability 31
Configuring Your VCCM Product 32
Accessories 37

3 | Page
VCCM600 Series User Manual | DOC6103r00 | Release date 02/03/2017
Vox Power Limited | Unit 2, Red Cow Interchange Estate, Ballymount, Dublin 22, D22 Y8H2, Ireland | T [phone] | www.vox-power.com
Part Numbers and Ordering Information
INPUT MODULES
Input Module
Details
VCCM600S
600 Watt Input Module with ITE Approvals (IEC60950 Edition 2)
VCCM600M
600 Watt Input Module with Medical Approvals (IEC60601 Edition 3 + IEC60601-1-2 Edition 4 EMC)
OUTPUT MODULES
Module
Nominal voltage
Rated current
Rated Power
Adjustment
range
Load regulation
Line regulation
OVP
OP 0
Unused slots
OP A
5V
25A
125W
1.5V-7.5V
±50mV
±0.1%Vnom
9V
OP B
12V
15A
150W
4.5V-15V
±100mV
±0.1%Vnom
18V
OP C
24V
7.5A
150W
9V-30V
±150mV
±0.1%Vnom
36V
OP D
48V
3.5A
150W
18V-58V
±300mV
±0.1%Vnom
66V
OP E
5v
100A
500W
Future release (4 slot module)
OP F
12v
50A
600W
Future release (4 slot module)
OP G
24V
25A
600W
Future release (4 slot module)
OP H
48V
12.5A
600W
Future release (4 slot module)
PART NUMBERING SYSTEM
VCCM Input
Module
VCCM600 S - A B C D - 0 0 0
Factory use
Product Type
USE '0' for unused slots.
S - Standard
M - Medical
Slot 1 - Output #
Slot 4 - Output #
Slot 2 - Output #
Slot 3 - Output #
Contact your Distributor or Vox Power for special configuration requirements. The factory may allocate a 3-digit suffix to identify such requirements.

4 | Page
VCCM600 Series User Manual | DOC6103r00 | Release date 02/03/2017
Vox Power Limited | Unit 2, Red Cow Interchange Estate, Ballymount, Dublin 22, D22 Y8H2, Ireland | T [phone] | www.vox-power.com
Important installation information
The VCCM600 series of configurable power supplies are intended for use within end customer applications which restrict access to un-authorized personnel. The
instructions in this manual and all warning labels on the product must be adhered to carefully.
SAFETY
The VCCM600S and VCCM600M series are designed in accordance with the relevant safety requirements of UL60950-1, IEC/EN60950-1, UL60601-1, IEC/EN60601-
1, CSA22.2 no 601-1, Low voltage Directive LVD 2014/35/EU and EMC directive EMC 2014/30/EU.
All VCCM600 series power supplies must be installed correctly in a controlled environment which restricts access to any un-authorised personnel. Equipment and
system manufacturers must protect service personnel against unintentional contact with the output terminals.
HAZZARDS
Dangerous voltages are present within the power supply. It should only be handled by qualified personnel when the power supply has been disconnected from
the mains supply voltage for more than 3 minutes.
External surfaces of the power supply may become extremely hot during and after operation. Appropriate care should be taken.
If series and/or parallel combinations of outputs exceed safe voltage and/or energy levels, the final equipment manufacturer must provide the appropriate
protection for both users and service personnel.
DE-RATINGS
Ambient Temperature
The input module power must be de-rated by 2.5%/°C above 50°C ambient up to a maximum ambient temperature of
70°C.
Baseplate Temperature
The output module power and current must be de-rated by 2.5%/°C above 85°C baseplate up to a maximum baseplate
temperature of 105°C.
Input Voltage
The input module power must be de-rated by 5W/VRMS below120 VRMS (600W @ 120 VRMS, 450W @ 90 VRMS)
Remember to take the appropriate de-rating into consideration before specifying any VCCM600 power supply for an application. If in any doubt, please contact
Vox Power directly or your local Vox Power representative.
HEALTH AND SAFETY
To comply with section 6 of the health and safety at work act, a label that is clearly visible to service personnel must be placed on the final equipment. These
labels warn that surfaces of the power supply may be hot and should not be touched when the product is operating.
FUSING
The power supply has internal dual pole fusing. One fuse in each line.
Fuses should only be replaced by authorised personnel and to ensure continued protection against risk of fire, fuses must be replaced with the same type and
rating of fuse.
For DC operation, an appropriately rated DC fuse must be included in the end application.
SERVICING
The power supply contains no user serviceable parts. Repairs must be carried out by authorised personnel only. Contact Vox Power for further information.
APPROVAL LIMITATIONS – NORTH AMERICA
When this product is used with 180VAC–253VAC mains where no neutral is present, connect the two live wires to L (Live) and N (Neutral) on the input connector.
COOLING
For proper operation of the power supply, the user must ensure sufficient cooling to maintain all component temperatures within specifications. A thorough
review of the user manual should be carried out for details of thermal performance.
EARTH TERMINAL MARKING
To comply with the requirements of UL60950-1, IEC/EN60950-1, CSA22.2 no. 60950-1, UL60601-1, IEC/EN60601-1, CSA22.2 no 601-1 where the incoming wiring
earth is intended for connection as the main protective earth conductor and where the terminals for such a connection is not supplied on a component or
subassembly, the user shall add an appropriate label displaying a protective earth symbol in accordance with 60417-2-IEC-5019 directly adjacent to the terminal.
The label should be durable and legible and should withstand the 15 second rub test as per UL60950-1 section 1.7.15.
WARRANTY
Contact your sales agent or Vox Power for product repairs. See Vox Power standard terms and conditions for warranty conditions.
PRODUCT LABELS
The external product label contains information relevant to the power system. The label contains input voltage, maximum input current, input frequency,
maximum output power, fuse rating and type, serial number, approvals and product part number in form VCCM600x-yyyy-zzz.
VCCM OUTPUT MODULES
Each output module label contains information relevant to that output. The label contains voltage adjustment range, maximum output current, serial number,
approvals and the part number in format OPx.
OTHER
•A label warning that external surfaces are hot during operation and that the unit should be allowed to cool down properly should be placed on the
unit where such a label is clearly visible.
•The VCCM600 series is designed to comply with EMC standards but it does not imply that the end system will comply.
•To prolong the life of the unit, use in dust free environment.
•Units can sometimes be damaged during transit. In the event of transit damage, DO NOT connect power to the unit. Contact your sales agent or Vox
Power.
•Always use adequately sized cables and ensure good crimp connections. Use cable supports to minimise stress on connectors.
•Avoid excessive shock or vibration.

5 | Page
VCCM600 Series User Manual | DOC6103r00 | Release date 02/03/2017
Vox Power Limited | Unit 2, Red Cow Interchange Estate, Ballymount, Dublin 22, D22 Y8H2, Ireland | T [phone] | www.vox-power.com
Theory of Operation
The diagram below outlines the topology and major internal components of a fully assembled VCCM600 configurable power supply. Four output slots are
provided and can be populated by any combination of
output modules . The remaining components in the block diagram are housed in the input and
transformer modules
.
The
input module is responsible for receiving the AC mains line voltage and converting it to an appropriate DC voltage whilst providing protection from AC line
disturbances and preventing excessive EMI emissions and current harmonics. The integrated EMI filter attenuates high frequency current emissions to levels
below EN55022 class B. It also provides dual pole fusing, one fuse in each conductor and protection from line disturbances as outlined in EN61000.
Inrush current is controlled by a resistive element upon initial connection to the AC line. Once the internal capacitances have been charged, the resistive element
is bypassed to reduce losses.
Active Power Factor Correction (PFC) is used to ensure an accurate input current waveform with extremely low harmonic content, exceeding the requirements of
EN61000. This stage also provides active input current limiting which prevents overloading of the input stage while maintaining high power factor.
The output of the PFC stage charges the hold-up electrolytic capacitors which store enough energy to allow the VCCM600 configured product to continue
operating during minor line disturbances. Long lifetime and high temperature capacitors are used which ensures extended lifetime and product reliability.
A highly efficient zero voltage switching circuit is used to drive the isolated transformer from the hold-up capacitors. The output modules connect to the
transformer secondary and provide safe isolated power to a high performance synchronous rectifier power converter. This power converter is controlled using
the latest analog control technology to produce superior output performance in a miniature size.

6 | Page
VCCM600 Series User Manual | DOC6103r00 | Release date 02/03/2017
Vox Power Limited | Unit 2, Red Cow Interchange Estate, Ballymount, Dublin 22, D22 Y8H2, Ireland | T [phone] | www.vox-power.com
Input Module Operation
Startup & Shut Down
The VCCM input module operates from a universal input voltage range and starts automatically upon application of adequate AC mains voltage (>84Vrms). After
a short delay, the global 5V bias supply starts and the ACOK signal goes high to indicate that the mains voltage is present and input stage is operating correctly.
Once the ACOK signal is high, the output modules turn on and deliver power to the application loads. The power good signals will indicate that the output
voltages are within specification. The diagram below shows the normal start up/shut down sequence and gives typical timings.
Typical timing values: t1ϕ≤2000 ms, t2ϕ≤400 ms, t3ϕ≤600 ms, t4ϕ≥15 ms, t5ϕ≥5ms (minimum), t6ϕ≥100 ms
When the AC mains voltage is removed, the internal hold-up capacitors will supply power to the load for typically 20 ms (t4+t5) at maximum power. The ACOK
signal will go low at least 5ms before the output voltages fall below the power good threshold level. This allows the application to prepare for the impending loss
of power. The 5V bias supply will remain on for typically 100ms, after the output modules have turned off.
Standby control
The unit may be completely shut down by shorting (<10Ω) the terminals of J2. The unit will restart once the short is released.
The control uses transformer coupled pluses to detect the short and is fully isolated to 2xMOPP. The voltage present on J2 ranges from +3.3V to -0.8V with a peak
current of 15mA. In active mode, the control is pulsed every 1.3mS while in standby mode the control is pulsed every 400mS. A signal MOSFET or switch may be
used to activate this control. This shutdown will not generate the ACOK warning signal.
Programmable start-up state
The start-up and standby control logic can be inverted by shorting J11 with a jumper. The functionality is shown in the table below.
J11
J2
Operational mode
Comments
Open
Open
NORMAL
Default. Unit will start into NORMAL mode
Open
Closed
STANDBY
<1W power consumption
Closed
Open
STANDBY
Unit will start into STANDBY mode. <1W power consumption
Closed
Closed
NORMAL
Note - J12 is reserved for internal use. Do not short J12
J11 LOCATION
J2 LOCATION
-+
J11
J12

7 | Page
VCCM600 Series User Manual | DOC6103r00 | Release date 02/03/2017
Vox Power Limited | Unit 2, Red Cow Interchange Estate, Ballymount, Dublin 22, D22 Y8H2, Ireland | T [phone] | www.vox-power.com
Hold-up
For short line distubances (<20ms), the output voltages will not be affected*. However, the ACOK signal may still go low to warn that there is an impending loss
of output power. The ACOK signal will return to the high state once the unit has recovered from the disturbance.
*Output modules that are adjusted above the hold-up voltage (as detailed in their respective datasheets), may experience a dip in voltage but never below the
hold-up voltage specified.
No Load Power/Standby Power Consumption
The no-load power consumption of the VCCM600 series PSU is extremely low when compared to similar configurable power supplies. With the output modules
enabled the unit typically only requires less than 15W with no output load. To reduce the no-load power further the outputs can be disabled using the inhibit
pins. With the outputs disabled the unit typically requires less than 10W. When the unit is in the standby (latched off) state, the power consumption is less than
1W.
Peak Power capability
The input module can provide a peak output power of up to 750W for a period of up to 5 seconds, provided the input current remains below the over current
protection threshold. Peaks of power lower than 750W can be supported for longer times provided the excess watt-seconds are equivalent. For example, 750W
peak for 5 seconds is an excess power of 150W*5s = 750Ws. 650W can be supported for 750Ws/50W = 15s. When using peak power capability, the user must
ensure the average power remains within ratings. Note that input module de-ratings apply to both rated power and peak power.
Input Module Protections
Over current protection (OCP)
The input module is protected from excessive input current by means of an over current protection circuit which limits the input current to approximately 7Arms.
If the OCP threshold is exceeded the unit may shut down and attempt to automatically restart. This shutdown will generate the usual ACOK warning.
Under voltage protection (UVP) & Brown-Out Protection (BOP)
The input module is protected from excessively low input voltages by under voltage and brown out protection circuits that senses the input line voltage. The
under-voltage protection circuit maintains the unit in standby mode until the input voltage rises above the UVP threshold as detailed in the datasheet. Once the
unit is active, the brown out protection monitors the input voltage and shuts down the unit when input voltage goes below approximately 60Vrms. This
shutdown will generate the usual ACOK warning. The unit will restart once the input voltage increases above the UVP threshold.
Over Temperature Protection (OTP)
The input module is protected from excessive temperatures by means of various internal temperature sensors. If temperature thresholds are exceeded the entire
unit may latch off, with no ACOK warning. To re-enable the unit, it must be allowed to cool, then either disconnect the AC mains for approximately 20 seconds, or
toggle the standby control on J2.
Over Power Protection (OPP)
The input module is protected from excessive power by means of an over power protection circuit. Should the rated power be exceeded the unit will shut down
and attempt to recover automatically.This shutdown will not generate the usual ACOK warning.

8 | Page
VCCM600 Series User Manual | DOC6103r00 | Release date 02/03/2017
Vox Power Limited | Unit 2, Red Cow Interchange Estate, Ballymount, Dublin 22, D22 Y8H2, Ireland | T [phone] | www.vox-power.com
Efficiency Performance
The efficiency of the configured VCCM600 product is dependent on parameters such as input line voltage, load level and on the combination of output modules.
The plots below show typical efficiencies of a VCCM600 product fitted with all modules A, B, C or D. The plots cover the full load and line voltage range. All
modules are adjusted to nominal voltages and are equally loaded.
An estimate of the overall efficiency for any configured system may be obtained from these graphs.
0.73
0.74
0.75
0.76
0.77
0.78
0.79
0.80
0.81
0.82
0.83
0.84
0.85
0.86
0.87
0.88
0.89
0.90
0.91
050 100 150 200 250 300 350 400 450 500 550 600
Efficiency
Output Power (Watts)
Typical Load Efficiency at 120VRMS input voltage
OPA OPB OPC OPD 0.73
0.74
0.75
0.76
0.77
0.78
0.79
0.80
0.81
0.82
0.83
0.84
0.85
0.86
0.87
0.88
0.89
0.90
0.91
050 100 150 200 250 300 350 400 450 500 550 600
Efficiency
Output Power (Watts)
Typical Load Efficiency at 220VRMS input voltage
OPA OPB OPC OPD
0.73
0.74
0.75
0.76
0.77
0.78
0.79
0.80
0.81
0.82
0.83
0.84
0.85
0.86
0.87
0.88
0.89
0.90
0.91
050 100 150 200 250 300 350 400 450
Efficiency
Output Power (Watts)
Typical Load Efficiency at 85VRMS input voltage
OPA OPB OPC OPD
0.73
0.74
0.75
0.76
0.77
0.78
0.79
0.80
0.81
0.82
0.83
0.84
0.85
0.86
0.87
0.88
0.89
0.90
0.91
80 100 120 140 160 180 200 220 240 260
Efficiency
InputVoltage(VRMS)
Typical Line Efficiency at maximum rated power
OPA OPB OPC OPD

9 | Page
VCCM600 Series User Manual | DOC6103r00 | Release date 02/03/2017
Vox Power Limited | Unit 2, Red Cow Interchange Estate, Ballymount, Dublin 22, D22 Y8H2, Ireland | T [phone] | www.vox-power.com
Power Ratings
VCCM600 series products must always be operated within stated operating limits. Equipment manufacturers and other users must take the appropriate de-rating
into account when specifying a unit for the intended application. If in doubt, contact your sales representative or Vox Power for assistance.
There are three main de-ratings for the VCCM600 series of configurable power supplies when used in a conduction cooled application,
1. Ambient air temperature (1)
Ambient air temperature de-ratings apply to the input module rated and peak
power only. (3)
The input module must be de-rated by 2.5% per degree Celsius above 50°C, up to
a maximum of 70°C.
2. Baseplate temperature (2)
Baseplate temperature de-ratings apply to output module rated power, peak
power and rated current, and bias supply power.
The output module parameters must be de-rated by 2.5% per degree Celsius
above 85°C, up to a maximum of 105°C.
3. Input line voltage
Input line voltage de-ratings apply to the rated power and peak power for both
the input module and output module. (3)
All parameters must be de-rated by 2.5% for every 3 volts below 120Vrms, down
to a minimum of 85Vrms.
Notes:
1. Ambient air temperature is the air temperature immediately surrounding the PSU.
2. Baseplate temperature is measured at baseplate temperature sensing location TS1.
3. A normalized value of 1 is equivalent to 100%.
4.
Input line voltage deratings are cumulative with temperature deratings.
Examples of power ratings calculation for various input voltages, ambient temperatures and baseplate temperatures
1
2
3
4
5
6
7
VIN (VRMS)
120
85
85
120
120
100
120
Normalised VIN Rating [A]
1
0.708
0.708
1
1
0.833
1
TAMBIENT (⁰C)
70
50
70
50
60
60
50
Normalised TAMBIENT Rating [B]
0.5
1
0.5
1
0.75
0.75
1
TBASE (⁰C)
85
85
85
95
105
95
105
Normalised TBASE Rating [C]
1
1
1
0.75
0.5
0.75
0.5
Normalised Total input rating [A*B = D]
0.5
0.708
0.354
1
0.75
0.624
1
Normalised Total output rating [A*C = E]
1
0.708
0.708
0.75
0.5
0.624
0.5
Input module PRATED/PEAK [600W/750W*D]
300/375
424.8/531
212.4/265.5
600/750
450/562.5
374.4/468
600/750
Bias supply power [5W*C]
5
5
5
3.75
2.5
3.75
2.5
OPA PRATED/PEAK [125W/187.5W*E]
125/187.5
88.5/132.75
88.5/132.75
93.75/140.625
62.5/93.75
78/117
62.5/93.75
OPA IRATED [25A*C]
25
25
25
18.75
12.5
18.75
12.5
OPB PRATED/PEAK [150W/225W*E]
150/225
106.2/159.3
106.2/159.3
112.5/168.75
75/112.5
93.6/140.4
75/112.5
OPB IRATED [15A*C]
15
15
15
11.25
7.5
11.25
7.5
OPC PRATED/PEAK [150W/225W*E]
150/225
106.2/159.3
106.2/159.3
112.5/168.75
75/112.5
93.6/140.4
75/112.5
OPC IRATED [7.5A*C]
7.5
7.5
7.5
5.625
3.75
5.625
3.75
OPD PRATED/PEAK [150W/217.5W*E]
150/217.5
106.2/154
106.2/154
112.5/163.125
75/108.75
93.6/135.72
75/108.75
OPD IRATED [3.75A*C]
3.75
3.75
3.75
2.8125
1.875
2.8125
1.875
System Cooling
0.4
0.5
0.6
0.7
0.8
0.9
1
1.1
-40 -30 -20 -10 010 20 30 40 50 60 70
Normalised output power rating
Ambient Temperature (Celcius)
Ambient Temperature Derating
Derate at 2.5% per degree celcius
above 50 degree celcius
0.4
0.5
0.6
0.7
0.8
0.9
1
1.1
80 100 120 140 160 180 200 220 240 260 280
Normalised Output Power rating
Input Voltage (RMS)
Input Line voltage Derating
Derate at 2.5% per every
3 volts below 120Vrms
0.4
0.5
0.6
0.7
0.8
0.9
1
1.1
-40 -30 -20 -10 010 20 30 40 50 60 70 80 90 100 110
Normalised Power & Current Rating
Baseplate Temperature (Celcius)
Temperature Derating
Derate at 2.5% per degree celcius
above 85 degree celcius

10 | Page
VCCM600 Series User Manual | DOC6103r00 | Release date 02/03/2017
Vox Power Limited | Unit 2, Red Cow Interchange Estate, Ballymount, Dublin 22, D22 Y8H2, Ireland | T [phone] | www.vox-power.com
The power ratings shown in the previous section are for conduction cooling, however the unit may be operated with forced air cooling, convection cooling or
combinations of all three. To assist in specifying the product for these applications, the typical thermal performance has been characterised under controlled
conditions. The ratings achieved are based on maintaining the baseplate temperature within the conduction cooled ratings specified on page 9.
CONVECTION PERFORMANCE
Natural Convection, No Heatsink, Free Air, Mounting Orientations A/B/C/D/E/F
CONVECTION PERFORMANCE WITH HEATSINK (1)
Natural Convection, With Heatsink, Free Air, Mounting Orientations A/B/C/D/E/F
Orientation definitions
A
B
C
D
E
F
Orientation
definitions
Notes
1. Standard Vox heatsinks type 1 and type 2 used. Type 1 used for mounting orientations A, B, E and F. Type 2 used for mounting orientations A, B, C and D.
0
50
100
150
200
250
300
350
400
450
500
550
-40 -30 -20 -10 010 20 30 40 50 60 70 80
Pout
Ambient Temperature
OPA 120Vin, 4x5Vout
A B CD EF
0
50
100
150
200
250
300
350
400
450
500
550
-40 -30 -20 -10 010 20 30 40 50 60 70 80
Pout
Ambient Temperature
OPA 220Vin, 4x5Vout
A B CD EF
0
50
100
150
200
250
300
350
400
450
500
550
600
650
-40 -30 -20 -10 010 20 30 40 50 60 70 80
Pout
Ambient Temperature
OPB/C/D 120Vin, 4x10/20/40Vout
A B CD EF
0
50
100
150
200
250
300
350
400
450
500
550
600
650
-40 -30 -20 -10 010 20 30 40 50 60 70 80
Pout
Ambient Temperature
OPB/C/D 220Vin, 4x10/20/40Vout
A B CD EF
0
50
100
150
200
250
300
350
400
450
500
550
-40 -30 -20 -10 010 20 30 40 50 60 70 80
Pout
Ambient Temperature
OPA 120Vin, 4x5Vout
A B CD EF
0
50
100
150
200
250
300
350
400
450
500
550
-40 -30 -20 -10 010 20 30 40 50 60 70 80
Pout
Ambient Temperature
OPA 220Vin, 4x5Vout
A B CD EF
0
50
100
150
200
250
300
350
400
450
500
550
600
650
-40 -30 -20 -10 010 20 30 40 50 60 70 80
Pout
Ambient Temperature
OPB/C/D 120Vin, 4x10/20/40Vout
A B CD EF
0
50
100
150
200
250
300
350
400
450
500
550
600
650
-40 -30 -20 -10 010 20 30 40 50 60 70 80
Pout
Ambient Temperature
OPB/C/D 220Vin, 4x10/20/40Vout
A B CD EF

11 | Page
VCCM600 Series User Manual | DOC6103r00 | Release date 02/03/2017
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FORCED AIR PERFORMANCE
No Heatsink, Air Direction X or Y at 2MS
-1
/1.5MS
-1
/1MS
-1
/0.5MS
-1
FORCED AIR PERFORMANCE WITH HEATSINK (2)
With Heatsink, Air Direction X or Y at 2MS
-1
/1.5MS
-1
/1MS
-1
/0.5MS
-1
Airflow definitions
X
Y
Z
Notes
1. Each 0.5MS-1 is approximately 100LFM. Eg. 2MS-1 ≈400LFM, 1.5MS-1 ≈300LFM etc.
2. Standard Vox heatsinks type 1 and type 2 used. Type 1 used for airflow direction X. Type 2 used for airflow direction Y.
The ratings provided above are for guidance only and all VCCM600 configured solutions must be evaluated in the end application to ensure the conditions set
out in the power ratings section are met.
0
50
100
150
200
250
300
350
400
450
500
550
-40 -30 -20 -10 010 20 30 40 50 60 70 80
Pout
Ambient Temperature
OPA 120Vin, 4x5Vout
2MS-1 1.5MS-1 1MS-1 0.5MS-1
0
50
100
150
200
250
300
350
400
450
500
550
-40 -30 -20 -10 010 20 30 40 50 60 70 80
Pout
Ambient Temperature
OPA 220Vin, 4x5Vout
2MS-1 1.5MS-1 1MS-1 0.5MS-1
0
50
100
150
200
250
300
350
400
450
500
550
600
650
-40 -30 -20 -10 010 20 30 40 50 60 70 80
Pout
Ambient Temperature
OPB/C/D 120Vin, 4x10/20/40Vout
2MS-1 1.5MS-1 1MS-1 0.5MS-1
0
50
100
150
200
250
300
350
400
450
500
550
600
650
-40 -30 -20 -10 010 20 30 40 50 60 70 80
Pout
Ambient Temperature
OPB/C/D 220Vin, 4x10/20/40Vout
2MS-1 1.5MS-1 1MS-1 0.5MS-1
0
50
100
150
200
250
300
350
400
450
500
550
-40 -30 -20 -10 010 20 30 40 50 60 70 80
Pout
Ambient Temperature
OPA 120Vin, 4x5Vout
2MS-1 1.5MS-1 1MS-1 0.5MS-1
0
50
100
150
200
250
300
350
400
450
500
550
-40 -30 -20 -10 010 20 30 40 50 60 70 80
Pout
Ambient Temperature
OPA 220Vin, 4x5Vout
2MS-1 1.5MS-1 1MS-1 0.5MS-1
0
50
100
150
200
250
300
350
400
450
500
550
600
650
-40 -30 -20 -10 010 20 30 40 50 60 70 80
Pout
Ambient Temperature
OPB/C/D 120Vin, 4x10/20/40Vout
2MS-1 1.5MS-1 1MS-1 0.5MS-1
0
50
100
150
200
250
300
350
400
450
500
550
600
650
-40 -30 -20 -10 010 20 30 40 50 60 70 80
Pout
Ambient Temperature
OPB/C/D 220Vin, 4x10/20/40Vout
2MS-1 1.5MS-1 1MS-1 0.5MS-1

12 | Page
VCCM600 Series User Manual | DOC6103r00 | Release date 02/03/2017
Vox Power Limited | Unit 2, Red Cow Interchange Estate, Ballymount, Dublin 22, D22 Y8H2, Ireland | T [phone] | www.vox-power.com
Specifying the VCCM600 product for convection or forced air cooling
To specify a VCCM600 series product for an end application, the required output power, minimum input line voltage, maximum ambient, mounting orientation
and air flow rate (if applicable) should be determined. Check the requirements against the closest characteristic plot from the tables above to ensure ratings can
be achieved. Be conservative when specifying the product as convection and forced air cooling can be highly dependent on the end application enclosure and
power supply mounting. The estimated performance must be verified in the end application and temperatures may exceed predicted levels. It is also important
to note that ambient temperature refers to the ambient temperature immediately surrounding the PSU. If the PSU is mounted within an enclosure the enclosure
ambient temperature is likely to be higher than the external air ambient temperature.
Evaluating the VCCM600 product in the end application
To ensure the product is operating within its ratings in the end application the following procedure should be performed during the design stage.
1. Install a thermocouple in position TS1 of the product. (See Mechanical dimensions and mounting for details.) The thermocouple wire should exit on
the top side between slots 2 and 3. The bottom side should be flush for heatsink mounting if necessary. Glue should be used to hold the
thermocouple in place.
2. Setup the application in worst case conditions, considering Input line voltage, Output power, ambient temperature, airflow and cooling restrictions.
3. Power the system and monitor the baseplate temperature until it reaches steady state.
4. Ensure that under worst case conditions, the baseplate temperature cannot exceed the rated temperature as outlined in the power ratings section of
this manual.
If a cover is placed over the primary components, then the following component temperatures must also be measured to ensure they are below the maximum
specified temperatures.
Description
Reference
Maximum allowed temperature
Drawing
Fuse FS1, FS2 125°C
Electrolytic capacitors C12 105°C
Inductors L1, L2, L3, L5 130°C
Other capacitors C1, C4 110°C
If excessive temperatures are measured during this evaluation, then one or more of the following remedies may improve thermal performance.
•Increase heatsink size
•Increase airflow rate
•Improve air intake & outlet
•Reduce power requirement
Using the internal temperature sensor to control external application cooling
An internal temperature sensor TSNS is available on J3 pin 9 (See page 14 for details). The output voltage of this sensor gives a measurement of the internal
transformer temperature and can be used to control external cooling systems or to provide a warning of impending over temperature protection.
The internal temperature (TSNS) should never exceed 120⁰C (2.74V), however, system reliability will be maximised if the PSU temperature is maintained as low as
possible in any given application.

13 | Page
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Signalling
Global Signals
To reduce cabling in the end system, all major input and output signals and the global 5V bias supply are wired to a single signals circuit that is accessed through
connector J3 on the transformer module as shown in the diagram below.
J3 – Global Signals
Pin Name Description
1 PG4 Slot 4 Power Good
2 INH4 Slot 4 Inhibit
3 PG3 Slot 3 Power Good
4 INH3 Slot 3 Inhibit
5 PG2 Slot 2 Power Good
6 INH2 Slot 2 Inhibit
7 PG1 Slot 1 Power Good
8 INH1 Slot 1 Inhibit
9 TSNS Temperature sense
10 ACOK AC mains signal
11 +5V 5V Bias supply
12 COM Common
All the signals are referenced to the bias supply common rail (COM) and external control and/or monitoring circuits can be easily powered and interfaced to the
PSU through this connector. The entire signals circuit is fully medically isolated and can be considered a SELV output. The table below lists the isolation voltages.
Signals isolation voltages
Signals to Input
4000
V
AC
Signals to Chassis
500
V
DC
Signals to Output
500
V
DC
Bias Supply (+5V [Power])
The VCCM600 series has one isolated bias supply located on the transformer module (J3) beside slot 4. The output side bias supply generates 5V and is rated up
to 1A. The supply is available whenever the AC mains voltage is connected and the input module is operating correctly. A shutdown through the standby control
on J2 or any of the following abnormal conditions will disable the 5V bias supply:
•Over temperature of any part of the unit
•Over voltage on any output module
•Internal over current (device failure)
AC Mains Signal (ACOK [Output])
An ACOK signal is provided to indicate to the user that the AC mains voltage is applied and the input module is operating correctly. The output signal is driven
from an internal operational amplifier. Under normal operating conditions this signal gives a warning of 5ms before the output voltage falls below the power
good threshold. A shutdown through the standby control on J2 or any of the following abnormal conditions may cause the unit to turn off without the minimum
5mS ACOK warning:
•Over temperature of any part of the unit
•Over voltage on any output module
•Internal over current (device failure)
1
2
11
12

14 | Page
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Power Good Signals (PG1-PG4 [Output])
Each output module provides a power good (PG) signal to indicate when the output voltage is above approximately 90% of the pre-set voltage for that module.
Each PG signal on an output module is internally connected through an opto-isolator to the
signals circuit, which provides and open collector output, as shown.
The LED on the front of each module gives a visual confirmation of the PG status.
Note that remote adjustments of the output voltage using the VCONTROL and ICONTROL pins do
not change the PG signal threshold. The PG threshold is always approximately 90% of the
voltage set with the manual potentiometer.
Output Inhibits (INH1-INH4 [Input])
The signals circuit provides an inhibit input to disable each output module individually. Each inhibit input is internally connected through an opto-isolator to the
respective output modules. The basic internal electrical circuit and timing diagrams are shown below.
Internal circuit
Timing: Typically, t
OFF
= 100 μs and t
ON
= 8 ms.
Internal Temperature sensor (TSNS [Output])
An internal temperature sensor is embedded in the transformer module. The output voltage of this sensor gives a measurement of the internal transformer
temperature and can be used to control external cooling systems or to provide a warning of impending over temperature protection. The sensor output voltage
is related to temperature as follows,
V = 0.4 + 0.0195*T
The sensor will accurately measure temperatures in the range -10⁰C to +125⁰C.
The internal temperature should never exceed 120⁰C (2.74V)
-20
0
20
40
60
80
100
120
00.5 11.5 22.5
TSNS output voltage Vs Internal Temperature

15 | Page
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Output Module Operation (A, B, C & D)
Power Profile
The power profile diagram below is a voltage/current plot that together with the associated table provides details of the main features of the currently available
output modules.
Parameter
OPA
OPB
OPC
OPD
V
NOM
(V)
5
12
24
48
V
MIN
(V)
1.5
4.5
9
18
V
MAX
(V)
7.5
15
30
58
V
OVP
(V)
9.5
17
32
66
I
RATED
(A)
25
15
7.5
3.75
I
OCP
(A)
27.5
16.5
8.25
4.125
V
SCP
(V)
1
2
4
4
I
SCP
(A)
22
13.2
6.6
3.3
P
RATED
(W)
125
150
150
150
P
PEAK
(W)
187.5
225
225
217.5
Output Voltage Adjustment
Each output can be adjusted within the range as described in the table above or in the datasheet. Voltage adjustment can be achieved by two methods;
1. Manual potentiometer adjustment
Using the manual adjust potentiometer (located beside the “Power Good” indicator on the top of each output module), the preset output voltage (VSET) of each
output module is adjustable over the entire range of VMIN to VMAX as specified in the power profile table above. A clockwise rotation of the potentiometer results in
an increase of the output voltage while an anti-clockwise rotation results in a decrease of the output voltage.
2. Remote Voltage Programming
Using remote voltage programming, the output voltage may be adjusted beyond the VMIN and VMAX range specified in the power profile table above. However,
certain precautions must be taken to ensure correct operation. Please see the “Advanced output module features” section for more details.
Over Voltage Protection (OVP)
In the event of an output module fault, the modules are protected against excessive output voltages. This is implemented as a fixed voltage threshold VOVP, in the
table above. If the output voltage exceeds this threshold, all outputs will be disabled temporarily. If the fault persists after 20mS the entire unit will be latched off,
otherwise the outputs will auto recover. To resume operation of a latched unit, disconnect the AC input voltage for 5 seconds or toggle the standby control on
J2. Note that no warning is given on the AC_OK signal for faults of this type.
Over Current & Short Circuit Protection (OCP & SCP)
For increased safety and reliability all output modules in the VCCM series have over current and short circuit protection. The over current threshold is typically set
at 115% of the rated current and has a constant current, straight line characteristic that reduces the output voltage as the load resistance decreases. If the output
voltages falls below the short circuit voltage threshold (VSCP) the module enters short circuit protection mode. In this mode the output module uses a hiccup
scheme to reduce system losses and potential damage. When in this mode, the output will be enabled for approximately 3% of the time, disabled for 97% and
will attempt to restart at approximately 125 ms intervals. The module remains in this state until the short circuit condition is removed, at which point normal
operation resumes.

16 | Page
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Reverse Current Protection (RCP)
The standard output modules use synchronous rectification in the output stages to achieve high efficiency and as a result the outputs can both source and sink
current. The sink current is internally limited to approximately -6% of the maximum rated current. However, in applications where the output modules are
connected to external power sources such as batteries or other power supplies certain precautions must be observed to prevent damage to the unit.
The outputs should never be directly connected to to external power sources without some form of reverse current protection such as an external diode or
controlled mosfet. If protection is not used, large reverse currents which will ultimately result in damage to the unit will occur, especially when the AC mains is
disconnected.
Output Module Average and Peak Power
All modules have an average and peak power rating. The average power of each unit must at all times remain below it’s specified limit. However, each output can
deliver up to 150% of it’s average power rating for a maximum of 5 seconds at 50% duty cycle, subject to the current limit not being exceeded and subject to the
overall average power drawn being less than the specified average power rating (including any input derating due to temperature or line voltage). The available
peak power is a function of the output voltage and maximum current for each module. Full peak power is only possible when the output voltage is adjusted to
VMAX and the maximum current is drawn from the module. Note that both average and peak power ratings are subject to the same temperature derating as the
input module (derate by 2.5% per °C above 50°C), but are not subject to any line derating.
Start-up & Shut Down
All outputs are designed to have a regulated monotonic start-up with a rise time of
approximately 3ms as shown in the diagram right. The power good signal will not assert until
the voltage exceeds the power good threshold (≈90%).
Where multiple output modules are used, the default start up scheme is ratio-metric with all
outputs starting at the same time as shown in the diagram right. External control circuits may
be used to implement tracking or sequenced start up if necessary.
The outputs are not designed to start into pre-biased loads and may discharge any externally
capacitance before beginning to ramp the output voltage up in the normal way.
At shutdown, the outputs enter a high impedance state. Where no external load is present it
may take some time for the voltage to decay. When driving inductive loads, care must be taken
to limit the voltage at the output terminals to prevent damage to the unit.
Synchronisation
All output modules in the same product are synchronised. The typical operating frequency is
260kHz and paralleled or series connected units will not produce ripple beat frequencies.
External capacitance
All outputs can support a large external capacitance as detailed in the table shown.
The capacitances specified ensure monotonic start-up with rated load applied.
Larger capacitances can be applied for lower load currents.
OP
CEXT_MAX
A
12mF
B
4mF
C
1mF
D
500uF

17 | Page
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Ripple and Noise
The ripple and noise figures stated in the datasheet are defined based on a standard measuring method. To obtain the same results the same test setup must be
used and care must be taken to eliminate any parasitic noise pickup. The diagram below shows details of the setup and sources of noise pickup.
Over Temperature Protection (OTP)
Each output module is protected against excessive temperatures. In the event of an internal temperature exceeding safe levels the output module will shut off. If
the temperature reduces the output module will automatically recover. Should the temperature continue to rise a second over temperature circuit will shut
down the input module and all outputs. To resume operation of the unit, disconnect the AC input voltage for 20 seconds then reconnect. If all temperatures are
within specifications the unit will restart. Note that no warning is given on the AC_OK signal for faults of this type.
Transient Response
The VCCM output modules have been especially designed to have high reliability. To achieve this all electrolytic capacitors have been eliminated from the
design. As a result of this, high dynamic load transients can cause relatively high voltage deviations at the output and although the outputs have a very high loop
bandwidth with typical recovery times of less than 100μs, the voltage deviations may still be excessive for some applications.
An example application is detailed in the diagram below and shows typical responses at the terminals of the output module and at the load. Notice that the
voltage deviation due to cable inductance exceeds the module response and hence a capacitor located at the module terminals will have little effect at the load.
The optimum solution is to locate a low impedance electrolytic capacitor at the load which will eliminate the inductive cable drop and reduce the typical voltage
deviation at the module.

18 | Page
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Advanced Output Module Features
Remote Voltage Programming (External Voltage Control)
The output voltage of the module can be adjusted using an external voltage source connected between the COM and VCONTROL pins on the signals connector J4
as shown below.
In this configuration the output voltage will follow the typical equation below,
VO= VSET((5-VCONTROL) / 3.8), where VSET is the manual preset voltage of the module.
Equivalent internal circuit
Control function
The output voltage can be controlled from 0% to 131.5% of the preset voltage using this control method. However, care must be taken to ensure the output
voltage does not exceeed the OVP level, as this will trigger OVP protection.
Remote adjustment of the output voltage using the VCONTROL pin does not affect the preset power good threshold. Hence, remotely adjusting the output voltage
below 0.9*Vset will cause the power good signal to go low.
Where tight voltage adjustment tolerances are required, it is recommended to use external circuitry to provide closed loop control of the VCONTROL pin.

19 | Page
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Remote Current Programming (External Voltage Control)
The output current limit of the module can be reduced using an external voltage source connected between the COM and ICONTROL pins on the signals connector
as shown below. In practice this also means that the output can be used as a modulated or constant current source.
Equivalent internal circuit
Control function
In the diagram above, Vi_out is an internal voltage source that is proportional to the internal inductor current and approximates the equation,
VI_OUT = 4*IOUT/IRATED, where Irated is the maximum rated current for the module.
In this configuration the output current limit will approximate the following equation,
ILIMIT = IRATED*VCTRL/4, where IRATED is the maximum rated current for the module.
It is not possible to increase the maximum current limit of the module, and control voltages exceeding 4.6V will have no effect on the current limit.
When using an output module as a modulated current source, the output voltage should be manually adjusted to the maximum that will be required by the
application and this will be the upper voltage limit. Once the load is connected, the output current can then be modulated by applying a control voltage as
described above.
Note that the power-good threshold level is fixed and defined by the manually preset voltage. Hence, while the output module is limiting or modulating the
output current the PG signal may go low.
Where tight current adjustment tolerances are required, it is recommended to use external circuitry to provide closed loop control of the ICONTROL pin.

20 | Page
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Output Current Measurement
The output current of the module can be measured using the ICONTROL signal. If this pin is not loaded its output voltage will follow the typical equation,
VI_OUT = 4*IOUT/IRATED, where IRATED is the maximum rated current for the module.
Note that the ICONTROL output voltage is representative of the internal inductor current not the actual load current. However, this will only have an influence
during dynamic events. It is recommended to add an external buffer amplifier (as shown below) when using the ICONTROL signal to measure the output current as
loading the ICONTROL signal, even with microamps can cause the current limit to be reduced. If it is required to measure the output current and adjust the output
current limit simultaneously, this can be achieved by using a clamp circuit instead of a voltage source to adjust the current limit, while continuing to use an
amplifier to measure the output current. An example circuit is shown below. In this case VCONTROL will control the current limit while the buffered ICONTROL signal will
provide a measurement of the output current.
Measuring output current
Measuring & controlling output current