Delta Electronics IPM- C Series User manual

1
Delta Electronics, Inc.
1.0Purpose
This document guides the user in performing
electronic measurements on an IPM POL (point
of load) DC/DC converter using the Delta
Evaluation Board.
2.0 Relevant Documentation
The documentation and background information
listed below is relevant to this evaluation
procedure:
․Applicative date sheets for IPM Series unit
under evaluation.
․Power Module Evaluation Board Schematic.
․Power Module Evaluation Board Layout.
․General Test and Safety Procedures.
IPM Series
Evaluation Procedure
EP_IPMC_04292005
Evaluation Procedure
(DEP-003)
The IPM- C Series POL converters
The IPM Series, single output, non-isolated
point of load DC/DC converters, are the latest
offering from a world leader in power systems
technology and manufacturing ―Delta
Electronics, Inc. They operate from a
3V~5.5V (IPM04C) or an 8V~14V (IPM12C)
source and provide a programmable output
voltage of 0.8V to 3.3V(IPM04C) or 0.8V to
5V(IPM12C). With creative design technology
and optimization of component placement,
these converters possess outstanding
electrical and thermal performance, as well
as offering extremely high reliability under
highly stressful operating conditions. All
models are protected against abnormal
input/output voltage and current conditions.
This document guides the user through the
evaluation procedure to qualify a POL module.
The data shown in this Evaluation Procedure
is for the SIP and SMT Package Type PO
L
evaluation board. Please refer to the
appropriate technical data sheet for detailed
performance and technical information for the
specific POL units.

3.0 Equipment Required
․DC Power Supply 0 - 20 V @ 0 - 20A (Agilent 6574A 0 -60V/0 - 35A or equivalent).
․Oscilloscope (Tektronix TDS 460A or equivalent) 4 Channel 400 MHz, equipped with a
x1 scope probe, a x10 scope probe, and two BNC cables (length less than 20
inches/500mm)
․Digital multimeters, one with 20A range and ideally all with 4 1/2 digit resolution
(DVM1, DVM2 and DVM3) (Zentech 2041 or equivalent).
․Electronic load (Chroma 63030 or equivalent), 300W approx rating, or a suitable
resistive load.
․DC power supply (GW GPC-3060D or equivalent).
4.0 Equipment Set-Up and Description
Please refer to the Power Module Evaluation Board Layout (see page 15) for reference designators
cited in this document and Figure 1 is the Set-up Diagram.
Figure 1. Set-up Diagram
2

4.1 Connect one lead from the “+” lead of the power supply to the “20A” terminal of the first
4.2 Connect one wire from the “-” lead of the power supply (Item 3.1) to the “Vin-“ pin of the
4.3 Connect the plus “+” and minus “-“ connection leads from a second multimeter to the “SVin+”
4.4 Connect the plus “+” and minus “-“ connection leads from the third multimeter to the “SVout+”
4.5 Connect a BNC cable (length less than 20 inches/500mm) from BNC1 of the Evaluation Board
4.6 Connect a BNC cable (length less than 20 inches/500mm) from BNC2 of the Evaluation Board
4.7 Connect the positive and negative power leads of the electronic load (ensuring correct polarity),
.8 For IPM04C series: Open J2 on the Evaluation Board. Connect one lead from the “+” lead of the
.0 Thermal Management of the Converter
o the converter at all times during all
multimeter DMM1. Then connect one lead from the “Common” of the DMM1 to the “Vin” pin of
the Evaluation Board. Set function of DMM1 to DCA to measure the input current.
Evaluation Board. Note: Use stranded leads at least equivalent to 14 AWG for all connections
in sections 4.1 and 4.2.
and “SVin-” Pins on the Evaluation Board. This multimeter is designated DMM2 to measure the
input voltage.
and “SVout-” Pin on the Evaluation Board. The multimeter is designated DMM3. DMM3 is used
to measure the output voltage.
to Channel 1 of the oscilloscope (item 3.2). This cable is used to measure the input voltage
(between SVin+ and SVin-).
to Channel 2 of the oscilloscope. This cable is used to measure the output voltage (between
SVout+ and SVout-).
or an appropriate resistive load, to the Evaluation Board output terminal pin (“+Vout” for positive
power lead and “-Vout” for the negative power lead).
4
power supply to the “12Vcc” on the Evaluation Board. Then connect one lead from the “-” of
the power supply to the “12VGND” on the Evaluation Board. For IPM12C: short J2 on the
Evaluation Board.
5
It is imperative that sufficient airflow should be provided t
portions of testing. Please refer to the applicative data sheet for the proper cooling and derating
necessary to achieve accurate results when testing the converter.
3

6.0 Tests Performed
performed at room temperature (+25 C).
6.1  Input Voltage Range.
ut.
.
6.2 O
 Line Regulation.
.
t-Point Adjustment Range.
6.3 D Maximum Output Voltage Deviation (due to step change in load).
6.4
Efficiency
e
part number of the power module to determine that the correct module is
being evaluated. Note: IPM12C0A0S04A and IPM04C0A0S06A would denote the SMT
2) t multimeters DMM2 and DMM3
to DC voltage, auto ranging.
3)
Turn on the Electronic Load (or resistive load) and adjust the current level. The maximum
nt is 4A for the model IPM12C0A0R04A series and 6A for the model
4) ble or disable the converter. Turn SW1 to the OFF position to enable
e converter, and turn SW1 to the ON position to disable the converter.
5) position if this
nction is not being used. Turn SW2 to the ON position if the Transient function test is
The following tests are
Input Characteristics
 Under-Voltage Locko
 No Load Input Current
utput Characteristics
 Load Regulation.
 Output Regulation
 Output Voltage Se
ynamic Characteristics

 Turn on Response time.
Thermal Characteristic

7.0 T
st Set-Up
7.1 Initial Set-Up
1) Examine the
package, while IPM12C0A0R04A and IPM04C0A0R06A would denote the SIP package.
This Evaluation Board can be used for both packages.
Set multimeter DMM1 to the DC current 20A range. Se
Electronic Load
rated output curre
IPM04C0A0R06A series. Ensure the output load does not exceed the recommended
maximum current.
SW1 is used to ena
th
SW2 is used for On/Off Transient function test. Turn SW2 to the OFF
fu
required.
4

6) ed for the trim-down or trim-up setting of the Output Voltage. For IPM, if the
converter requires a trim up, set SW3 to the Trim-up position. If the converter requires a
7) l
resistors. For IPM12C0A0R04A, if the converter requires a trim-up to 5V, set the SW4_1
8) rim-up, set the SW4_2 to
ON position and SW3 to trim-up position. If the converter requires a trim-down, set the
Subdivide switch NO. For adjustable output
module
For constant output
module
trim down, set SW3 to the Trim-down position. For normal operating, turn off the SW3.
SW4 and SW5 are used for the Output Voltage Set-Point Adjustment by externa
to ON position and SW3 to trim-up position. If the converter requires a trim-down to 0.8V,
set the SW5_8 to ON position and SW3 to trim-down position.
For constant output voltage module, if the converter requires a t
SW5_8 to ON position and SW3 to trim-down position. Please refer to the Function
Tables below for the setting details.
SW4 Function Table
SW4_1 5.0V setting 5.0V trim up
SW4_2 3.3V setting 3.3V trim up
SW4_3 2.5V setting 2.5V trim up
SW4_4 1.8V setting 1.8V trim up
SW4_5 1.5V setting 1.5V trim up
SW4_6 1.2V setting 1.2V trim up
SW4_7 1.0V setting 1.0V trim up
SW4_8 0.95V setting 0.9V trim up
Note: Settings of SW4_1 and SW4_7 are for IPM12C se
Subdivide switch NO. For adjustable output
module
For constant output
module
ries only
SW5 Function Table
SW5_1 - 5.0V trim down
SW5_2 - 3.3V trim down
SW5_3 - 2.5V trim down
SW5_4 - 1.8V trim down
SW5_5 - 1.5V trim down
SW5_6 - 1.2V trim down
SW5_7 - 1.0V trim down
SW5_8 0.80V setting 0.9V trim down
SW3 is us
5

7.2 Initial Power Up
supply ON, set the current limit on power supply (refer to specification of
either converter) and increase the input voltage (use DMM2 to monitor the voltage) until it
2)
3) ing, which can be verified by observing the DMM3 (appropriate
ope (appropriate value
4)
8.0 Tests and Evaluation
nge and Under-Voltage Lockout
d from 3.0Vin to 5.5Vin. For
e output of 3.3V, the input voltage range is from 4.0Vin to 5.5Vin. The IPM12C Series
) Turn on the fan.
t the input voltage to the desired operating point while monitoring DMM2.
1 to the “OFF” position to enable the converter.
nnel 1 of the
onverter reaches the
8.1.
) Set the input voltage to the desired operating point while monitoring DMM2.
1 to the “OFF” position to enable the converter.
ter.
round 20 to 85mA for the IPM12C series and around
nder evaluation. (Please
1) Turn the power
reaches the desired value.
Set the switch SW1 to “OFF” position to enable the power module.
The converter is now operat
value for the nominal output voltage) and channel 2 of the oscillosc
for the nominal output voltage).
Set the switch SW1 to the “ON” position after performing each test.
8.1 Input Characteristics
8.1.1 Input Voltage Ra
The IPM04C Series of DC/DC converters will operate at full loa
th
DC/DC converters will operate at full load from 8Vin to 14Vin for 12Vin (nominal) types. The
converters feature input under-voltage protection, which will not allow the converter to start
up unless the input voltage exceeds the turn-on voltage threshold.
Test
1
2) Se
3) Set the switch SW
4) Test the input under voltage function while observing DMM2, DMM3 and cha
oscilloscope. Increase the input voltage until the output of the c
appropriate value. This will occur between 2.40 and 2.70 volts for IPM04C modules and
between 7.6 to 8.0 volts for IPM12C modules. Please refer to the appropriate converter
data sheet for the detailed specification.
2 No Load Input Current Test
1) Turn on the fan.
2
3) Set the switch SW
4) Remove/disable the output electronic load or resistive load.
5) Note the input current from DMM1.
6) The result is the No-Load Input current of the DC/DC conver
The No-Load Input Current will be a
20 to 70mA for the IPM04C series depending on the model u
refer to the data sheet for the detailed specification).
6

8.2 Output Characteristics
Line Regulation Deviation is defined as the change in output voltage caused by varying the
ied range while the output load and temperature remain constant.
2 Set the output power to the desired operating point.
t the switch SW1 to the “OFF” position to enable the converter.
8.2.1 Line Regulation
input voltage over a specif
Test
1) Turn on the fan.
)
3) Se
4)
A
djust the input voltage across the converter’s input range (refer to specified range) while
full range of the input
Load Regulation Deviation is defined as the changes in output voltage caused by varying the
e specified range (no load to full load) while the input voltage and
mperature remain constant.
) Set the input voltage to the desired operating level while monitoring DMM2.
t the switch SW1 to the “OFF” position to enable the converter.
load across the converter’s operating load range.
the operating
ion).
Output Ripple is defined as the periodic AC component on the DC/DC converter’s output
le is measured in terms of peak to peak and RMS values, both done
ith a specific bandwidth.
) Set the switch SW1 to the “OFF” position to enable the converter.
just the input voltage while monitoring DMM2 and set the output load to the full rated
nd 10mV/Div using the
5) ple of the DC/DC converter is measured at full load operating power.
monitoring DMM2.
5) Note the maximum +/- deviation of the output voltage over the
operating voltage (please refer to the data sheet for the detailed specification).
8.2.2 Load Regulation
output load current over th
te
Test
1) Turn on the fan.
2
3) Se
4) Adjust the output
5) Note the maximum +/- deviation of the output voltage over the full range of
load range (please refer to the data sheet for the detailed specificat
8.2.3 Output Ripple
voltage. The output ripp
w
Test
1) Turn on the fan.
2
3) Ad
load current.
4) Adjust channel 2 on the oscilloscope to be AC coupled at 1µS/Div a
20 MHz bandwidth-limit option on the scope.
The output rip
7

.2.4 Output Voltage Set-Point Adjustment Range (Trim)
utput Voltage Set-Point Adjustment can be carried out by using an external resistor or
e set-point (please refer to
ments to Item 7.1-6,
ries
between the
TRIM pin and ground. For IPM12C0A0R04A, Please refer to the IPMR table for the desired
trim-up can be calculated by the following equation and the datasheet can
8
O
external voltage source to increase or decrease the output voltag
e data sheet for the detailed specification). Refer all trim voltage requireth
7.1-7, 7.1.8, and refer all the design numbers to Evaluation Board Schematic.
(1) Output Voltage Set-Point Adjustment by using an external resistor
For IPM12C se
To implement Trim-up by using an external resistor, Rtrim-up must be connected
Vout. The value of R
also be referred for further information.
Ω−
−
=
−k
V
Ruptrim 261.0
9.0
752.3
out
To implement Trim-down by using an external resistor, Rtrim-down must be connected between
the TRIM pin and Vout. For IPM12C0A0R04A, Please refer to the IPMR table for the desired
out. The value of R can be calculated by the following equation and the datasheet Vtrim-down
can also be referred for further information.
Ω−
−
=
−k
V
Rdowntrim 621.5
9.0
072.1
out
IPMR: Rtrim values versus some commonly used Vout for IPM12C0A0R04A.
Vout Rtrim (Ω)
0.800 5.09K
0.900 Open
1.0 37.2K
1.2 12.2K
1.5 5.98K
1.8 3.90K
2.5 2.08K
3.3 1.30K
5.0 653
8

For I M04C series
o implement Trim-up by using an external resistor, Rtrim-up must be connected between the
d. For IPM04C0A0R06A, Please refer to the IPMR table for the desired
9
P
T
TRIM pin and groun
Vout. The value of Rtrim-up can be calculated by the following equation and the datasheet can
also be referred for further information.
Ω−
−k
out
V
uptrim 187.0
9.0
0.7
To implement Trim-down by using an external resistor, Rtrim-down must be connected between
e TRIM pin and Vout. For IPM04C0A0R06A, Please refer to the IPMR table for the desired
=
−
R
th
Vout. The value of Rtrim-down can be calculated by the following equation and the datasheet
can also be referred for further information.
Ω−
−
−k
out
V
downtrim 187.10
9.0
0.2
IPMR: Rtrim values versus some commonly used Vout for IPM04C0A0R06A.
=R
Vout Rtrim (Ω)
0.8 9.813K
0.9 Open
1.2 23.146K
1.5 11.479K
1.8 7.590K
2.5 4.188K
3.3 2.729K
Test
1) Turn on the fan.
just the input voltage while monitoring DMM2 and with output load set to the desired 2) Ad
operating point.
3) Set the enable switch SW1 to the “OFF” position to enable converter.
4) Use SW3, SW4 and SW5 (refer to Item 7.1_7) for Trim setup.
5) Note the voltage by observing DMM3.
6) Test the Load Regulation (refer to Item 8.2.2).

(2) Output Voltage Set-Point Adjustment by using an external voltage source
For IPM12C series
Output voltage of IPM12C is programmable while applying a voltage between the TRIM
and GND pins. The following equation can be used to determine the value of Vtrim
needed for a desired output voltage Vo:
Vtrim = 0.7439 – 0.0488Vo
Vtrim is the external voltage in V
Vo is the desired output voltage
For example, to program the output voltage of a IPM
module to 3.3 Vdc, Vtrim is calculated as follows:
Vtrim = 0.7439 – 0.0488 x 3.3
= 0.5829V
For IPM04C series
Output voltage of IPM04C is programmable while applying a voltage between the TRIM
and GND pins. The following equation can be used to determine the value of Vtrim
needed for a desired output voltage Vo:
Vtrim = 0.7168 – 0.0187Vo
Vtrim is the external voltage in V
Vo is the desired output voltage
For example, to program the output voltage of a IPM
module to 3.3 Vdc, Vtrim is calculated as follows:
Vtrim = 0.7168 – 0.0187 x 3.3
= 0.655V
Figure 2. Configuration for programming output voltage using an external voltage source
10

11
8.3 Dynamic Characteristics
8.3.1 Output Voltage Deviation
Output Voltage Deviation is defined as the response of the converter to a sudden step change
in the output load current. The output voltage deviation is characterized by two parameters:
Maximum Output Voltage Deviation and Response Time (please refer to the data sheet for the
detailed specification). The value of dynamic resistance for a defined step current is defined as:
Imax
Vout
Rdynamic *5.0
=
Test
1) Turn on the fan.
2) Adjust the input voltage to the desired operating point.
3) Set the electronic or resistive load at 50% of maximum load.
4) Change channel 1 to scope probe and measure across the .
dynamic
R
5) Set the switch SW1 to the “OFF” position to enable the converter.
6) Set channel 2 on the oscilloscope to be AC coupled and to 50mV/Div and for 50uS/Div. Set
the trigger to auto and adjust the trigger point at a negative going pulse for step load
change from 50% to 100% of Io or adjust the trigger point at positive going pulse for step
load change from 100% to 50% (Please refer to data sheet)
7) Measure the Peak deviation and capture the waveform as required.
8.3.2 Turn-On Transient Time
Turn-On Response Time is defined as the time it takes for the output to rise to within 90% of its
final value from the time when the converter is enabled. The rise time is deliberately made
slower to reduce the inrush current and to eliminate any overshoot in the output voltage. These
test functions have two categories.
1) Turn on the module by using the External switch to control input voltage.
2) Turn on module by using the Enable on/off.
Note: There is a difference in performance in each mode - please refer to the data sheet fo
r
the detailed specification.

Test (Turn on the module by using the external switch)
1) Turn on the fan.
2) Turn on the input power supply and set it to the desired operating point.
3) Set channel 1 on the oscilloscope to be DC coupled and to the appropriate range for the
input voltage.
4) Connect a coaxial cable from channel 1 to BNC1 on the Evaluation Board.
5) Set channel 2 on the oscilloscope to be DC coupled and to the appropriate range for the
output voltage.
6) Connect a coaxial cable from channel 2 to BNC2 on the Evaluation Board.
7) Set the Time base to 5mS/Div
8) Set the Trigger mode to normal trigger and set the Trigger level at approximately 2V (rising)
or suitable trigger point (referring to data sheet) on channel 2.
9) Turn on the external switch to supply power source to module and use the cursor V Bars o
f
Scope to measure the delay time, and then record the waveform on the oscilloscope.
Test (Turn on the module by using the Enable on/off)
1) Turn on the fan.
2) Turn on the input power supply and set it to the desired operating point.
3) Set channel 1 on the oscilloscope to be DC coupled and to 1V/division. (Refer to data
sheet).
4) Connect a scope probe from channel 1 between the on/off control pin and reference
ground (SGND) on the Evaluation Board.
5) Set channel 2 on the oscilloscope to be DC coupled and to the appropriate range for the
output voltage.
6) Connect a coaxial cable from channel 2 to BNC2 on the Evaluation Board.
7) Set the Time base to 5mS/Div
8) Set the Trigger mode to normal trigger and set the Trigger level at approximately 2V (rising)
or suitable trigger point (referring to data sheet) on channel 2.
9) Turn on-off Enable switch (SW1) and use the cursor V Bars of Scope to measure the delay
time, and then record the waveform on the oscilloscope.
8.4. Thermal Characteristic
8.4.1 Efficiency
Efficiency is the ratio of total output power to the input power. It is typically measured at full
load and nominal input voltage.
Test
1) Turn on the fan.
2) Set the enable switch SW1 to the “OFF” position to enable the converter.
3) Adjust the input voltage to the desired operating point.
4) Set the electronic or resistive Load to the desired operating point.
5) Read and note the output voltage (DMM3) and input voltage (DMM2).
6) Read and note the input and output currents from the DMM1 and the electronic load.
12

7) Use the following formulas to calculate the efficiency:
Efficiency= (Pout/Pin) × 100(%)
Pin = Iin × Vin
Pout = Iout × Vout
For IPM12C series
The following graph shows the efficiency results of the IPM12C0A0R04A converter measured at
different operating points, the output voltage was set at 5V.
70
80
90
100
123
LOAD (A)
EFFICIENCY(%)
4
Vi=14V
Vi=12V
Vi=10V
Vi=8V
For IPM04C series
The following graph shows the efficiency results of the IPM04C0A0R06A converter measured at
different operating points, the output voltage was set at 3.3V.
75
85
95
123456
LOAD (A)
EFFICIENCY(%)
Vin=5.5V
Vin=5.0V
Vin=4.0V
13

14
Appendix A- Evaluation Board Schematic

15
Appendix B - Evaluation Board Layout (Top View)

Appendix C - Evaluation Board Layout (Bottom View)
CONTACT: www.delta.com.tw/dcdc
USA:
Telephone:
East Coast: [phone]
West Coast: [phone]
Fax: [phone]
Email: [email protected]
Europe:
Phone: [phone]
Fax: [phone]
Email: [email protected]
Asia & the rest of world:
Telephone: [phone] ext 6220
Fax: [phone]
Email: [email protected]
WARRANTY
Delta offers a two (2) year limited warranty. Complete warranty information is listed on our web site or is available upon
request from Delta.
Information furnished by Delta is believed to be accurate and reliable. However, no responsibility is assumed by Delta for
its use, nor for any infringements of patents or other rights of third parties, which may result from its use. No license is
granted by implication or otherwise under any patent or patent rights of Delta. Delta reserves the right to revise these
specifications at any time, without notice.
16