PowerBox COSEL BRFS30 User manual

BRFS-6
Basic Characteristics Data
Basic Characteristics Data
Model Circuit method
Switching
frequency
[kHz]
(reference)
Input
current
[A]
Inrush
current
protection
PCB/Pattern Series/Parailel
operation
Material
Single
sided Double sided Series operation Parailel operation
BRFS30 Buck Converter 300 *1- glass fabric base,epoxy resin -
Multilayer
-*3
BRFS40 Buck Converter 300 *1-
glass fabric base,epoxy resin -
Multilayer
-*3
BRFS50 Buck Converter 300 *2*1-
glass fabric base,epoxy resin -
Multilayer
-*3
BRFS50L Buck Converter 300 *2*1-
glass fabric base,epoxy resin -
Multilayer
-*3
BRFS60 Buck Converter 300 *2*1-
glass fabric base,epoxy resin -
Multilayer
-*3
BRFS100 Buck Converter 300 *2*1-
glass fabric base,epoxy resin -
Multilayer
-*3
*1Refer to Specification.
*2BRFS50,50L,60 and 100 has 2 Phase Interleaving inverters, the frequency of ripple is 600kHz.
*3Refer to the Instruction Manual.
BRFS
mebrfs.inddBRFS-6me brfs indd BRFS-6 2014/09/309:59:552014/09/30 9:59:55

1 Pin Configuration BRFS-8
4 Function BRFS-10
4.1 Overcurrent protection
4.2 Thermal protection
4.3 Remote ON / OFF
4.4 Remote sensing
4.5 Adjustable voltage range
4.6 Softstart/Start-up sequence
4.7 Power good
4.8 Sequence
5 Series and Parallel Operation BRFS-12
6 Implementation-Mounting Method BRFS-13
BRFS-10
BRFS-10
BRFS-10
BRFS-10
BRFS-10
BRFS-11
BRFS-12
BRFS-12
2 Connection for Standard Use BRFS-8
3 Wiring Input / Output Pin BRFS-9
3.1 Wiring input pin
3.2 Wiring output pin
BRFS-9
BRFS-9
5.1 Series operation
5.2 Parallel operation
BRFS-12
BRFS-12
6.1 Mounting method
6.2 Automatic mounting
6.3 Soldering
6.4 Cleaning
6.5 Storage method
BRFS-13
BRFS-13
BRFS-13
BRFS-13
BRFS-13
7 Safety Considerations BRFS-14
8 Derating BRFS-14
8.1 BRFS series Derating BRFS-14
9 Package Information BRFS-15
DC-DC Converters PCB Mount type
BRFS-7
Instruction Manual
BRFS

1 Pin Configuration
Table 1.1 Pin connection and function of BRFS30/40
Pin No. Pin Connection Function
RC Remote ON/OFF
+VIN +DC input
SEQ Control of Start up time and turn
GND GND (-DC input, -DC output)
+VOUT +DC output
TRM Adjustment of output voltage
+S +Remote sensing
GND GND (-DC input, -DC output)
NC(PGOOD/
SHARE) NC (optional : Power good(BRFS30/40), SHARE (BRFS40)
SGND SGND (-DC input, -DC output)
1
2
345679
8
0
Fig.1.1 Pin connection of BRFS30/40 (BOTTOM VIEW)
Table 1.2 Pin connection and function of BRFS50/50L/60/100
Pin No. Pin Connection Reference
+VIN +DC input
GND GND (-DC input, -DC output)
+VOUT +DC output
+VOUT +DC output
GND GND (-DC input, -DC output)
+VIN +DC input
SEQ Control of Start up time and turn
PGOOD Power good
RC Remote ON/OFF
-S -Remote sensing
+S +Remote sensing
+TRM +Adjustment of output voltage
-TRM -Adjustment of output voltage
SHARE Parallel operation
(a) BRFS50/50L/60 (b) BRFS100
Fig.1.2 Pin connection of BRFS50/50L/60/100 (BOTTOM VIEW)
2
Connection for Standard Use
¡In order to use power supply,it is necessary to wire as shown in
Fig.2.1 and Fig.2.2.
Ci
+VIN
SGND
F1
RC
GND
+VOUT
TRM
+S
R
TRM
DC
input Load
Fig.2.1 Connection for standard use of BRFS30/40
Ci
+VIN
F1
RC
GND
+VOUT
+TRM
-TRM
+S
-S
R
TRM
DC
input Load
Fig.2.2 Connection for standard use of BRFS50/50L/60/100
Reference 3 "Wiring Input/Output Pin"
8 "Derating"
¡Short the following pins to turn on the power supply.
GND RC, +VOUT +S, GND -S (-S : only BRFS50/50L/60/100)
Reference 4.3 "Remote ON/OFF"
4.4 "Remote sensing"
¡Connect resistance to set the output voltage between TRM and
GND.
Reference 4.5 "Adjustable voltage range"
¡Between input and output is not isolated .
¡The BRFS series handle only the DC input.
Avoid applyingAC input directly.
It will damaged the power supply.
Table 2.1 External parts
No. Parts Reference
1 F1:Fuse
3.1(1) External fuse
2 Ci:External output capacitor
3.1(2) External input capacitor
3RTRM:Resistance for adjustment
output voltage
4.4 Adjustable voltage range
DC-DC Converters PCB Mount type Instruction Manual
BRFS-8
BRFS

3 Wiring Input/Output Pin
3.1 Wiring input pin
(1) External fuse
¡Fuse is not built-in on input side. In order to protect the unit, install
the normal-blow type fuse on input side.
Table 3.1 Recommended fuse (normal-blow type)
Model BRFS30/40 BRFS50/50L BRFS60 BRFS100
Rated current 40A 40A 60A 80A
¡When the input voltage from a front end unit is supplied to multiple
units, install the normal-blow type fuse in each unit.
¡When the fuse is open, power good signal is not outputed.
(2) External capacitor on the input side
¡Install an external capacitor Cin, between +VIN and GND input
pins for low line-noise and for stable operation of the power sup-
ply.
Table3.2 Recommended external input capacitor(Ceramic)
Model Recommended Ci
Vin=5V Vin=12V
BRFS30/40 8×22mF 4×22mF
BRFS50/50L 8×22mF 4×22mF
BRFS60 8×22mF 4×22mF
BRFS100 8×22mF 4×22mF
¡Cin is within 5mm for pins. Make sure that ripple current of Cin is
less than its rating.
¡When an impedance and inductance level of the input line become
higher, the input voltage may become unstable. In that case, the
input voltage becomes stable by increasing Cin.
(3) Recommendation for noise-filter
¡Install an external input filter as shown in Fig.3.1 in order to re-
duce conducted noise. Cin is shown in Table 3.2.
C1
L1F1
Ci
+VIN
GND
DC
input
C1 :220mF(BRFS30/50/50L)
:470mF(BRFS40/60/100)
L1 :0.3mH
Fig.3.1 Example of recommended external input filter
(4) Reverse input voltage protection
¡Avoid the reverse polarity input voltage. It will damage the power
supply.
It is possible to protect the unit from the reverse input voltage by
installing an external diode as shown in Fig.3.2.
+VIN
GND
DC IN
Fig.3.2 Reverse input voltage protection
3.2 Wiring output pin
¡When the BRFS series supplies the pulse current for the pulse
load, please install a capacitor Co between +VOUT and GND
pins.
+VOUT
Co
GND
Pulse
Load
Fig.3.3 wiring external output capacitor
Table 3.3 Recommended Capacitor and max Co
Model Recommended Co MAX Co
BRFS30/40 3×100mF 10,000mF
BRFS50/50L 2×100mF 10,000mF
BRFS60 2×100mF 10,000mF
BRFS100 4×100mF 20,000mF
¡The output ripple voltage may grow big by resonance with Co and
ESL of the wiring, if resonance frequency and switching frequency
are close.
¡Ripple and Ripple Noise are measured, as shown in the Fig.3.4.
Co0, Co1, Co2 and Co3 is shown in Table 3.3.
+VOUT
GND 50mm
+VIN
GND
Co2
Oscilloscope R
C
BW:20MHz
Co3 Co4Co1
1.5m 50W
Coaxial cable
R=50W
C=4700pF or 10000pF
1mm
Co0
1mm 1mm1mm
Load
DC
input
Fig.3.4 Measuring method of Ripple and Ripple Noise
Table 3.4 Co0, Co1, Co2 and Co3 which is used in measuring
No. Model Co0 Co1 Co2 Co3 Co4
1 BRFS30
--
100mF 100mF 100mF
2 BRFS40 100mF
-
100mF 100mF 100mF
3 BRFS50/50L/60
---
100mF 100mF
4 BRFS100
-
100mF 100mF 100mF 100mF
DC-DC Converters PCB Mount type Instruction Manual
BRFS-9
BRFS

4 Function
4.1 Overcurrent protection
¡Over Current Protection (OCP) is built-in and works at 105% of
the rated current or higher. However, use in an overcurrent situa-
tion must be avoided whenever possible.
The output voltage of the power module will recover automatically
when the fault causing overcurrent is corrected.
When the output voltage drops after OCP works, the power mod-
ule enters a ”hiccup mode” where it repeatedly turns on and off at
a certain frequency.
4.2 Thermal protection
¡When the power supply temperature is kept above 120C, the
thermal protection will be activated and simultaneously shut down
the output.
The output voltage of the power supply will recover automatically
when the unit is cool down.
4.3 Remote ON/OFF
¡The remote ON/OFF function is incorporated in the input circuit
and operated with RC and GND. If positive logic control is re-
quired, order the power supply with “-R” option.
Table4.1 Specification of Remote ON/OFF
ON/OFF
logic Between RC and GND Output voltage
Standard Negative L level(-0.2 - 0.6V) or short ON
H level(3.0 - VIN) or open OFF
Optional -R Positive L level(-0.2 - 0.6V) or short OFF
H level(3.0 - VIN) or open ON
*Source current from RC pin is 0.5mA(max).
¡When remote on/off function is not used, please short GND and
RC.
SW
RC
RC
RC
GND
GND
Transistor
External
Power supply
(a ()b)
(c ()d)
GND
VCC
( Vin)
IC
DC
input DC input
+VIN
RC
GND
+VIN
Fig.4.1 RC connection example
4.4 Remote sensing
(1) When the remote sensing function is not in use
+S
+VOUT
- S
GND
LOAD
Short at pin root
Fig.4.2 Connection when the remort sensing is not in use
¡When the remote sensing function is not in use, it is necessary to
confirm that pins are shorted between +S & +VOUT and between
-S & GND.
¡Wire between +S & +VOUT and between -S & GND as short as
possible.
Loop wiring should be avoided.
This power supply might become unstable by the noise coming
from poor wiring.
(2) When the remote sensing function is in use
GND
+S Load
-S
+VOUT
Wire as close as possible
Fig.4.3 Connection when the remote sensing is in use
¡Twisted-pair wire or shield wire should be used for sensing wire.
¡Thick wire should be used for wiring between the power supply
and a load.
Line drop should be less than 0.5V.
Voltage between +VOUT and GND should remain within the out-
put voltage adjustment range.
¡If the sensing patterns are short, heavy-current is drawn and the
pattern may be damaged.
The pattern disconnection can be prevented by installing the pro-
tection parts as close as a load.
4.5 Adjustable voltage range
¡Output voltage is adjustable by the external resistor.
¡The temperature cofficiect could become worse, depending on the
type of a resistor.
Resistor.....Metal film type, coefficient of less than ±100ppm/C
¡When TRM is opened, output voltage is adjusted to the minimum.
¡RTRM is calculated in the following expressions.
BRFS30 BRFS40 BRFS50/50L/60/100
RTRM =[kW]
8
VOUT㧙0.8
RTRM =[kW]
12
VOUT㧙0.6
RTRM =[kW]
14
VOUT㧙0.7
DC-DC Converters PCB Mount type Instruction Manual
BRFS-10
BRFS

Table 4.2 Calculation result of Table 4.3 Calculation result of
BRFS30 BRFS40
No VOUT RTRM No VOUT RTRM
1 0.8 OPEN 1 0.6 OPEN
2 1.0 40.0kW2 1.0 30.0kW
3 1.2 20.0kW3 1.2 20.0kW
4 1.5 11.429kW4 1.5 13.3kW
5 1.8 8.0kW5 1.8 10.0kW
6 2.5 4.706kW
7 3.3 3.2kW
Table 4.4 Calculation result of
BRFS50/50L/60/100
No VOUT RTRM
1 0.7 OPEN
2 1.0 46.6kW
3 1.2 28.0kW
4 1.5 17.5kW
5 1.8 12.7kW
+VOUT
GND
TRM
R
TRM
+VOUT
GND
+TRM
R
TRM
-TRM
LoadLoad
Fig.4.4 Connecting BRFS30/40 Fig.4.5 Connecting BRFS50/50L/60/100
4.6 Softstart/Start-up sequence
¡The adjustment of the rise time is possible by connecting CSEQ.
GND
BRFS
SEQ
RC
OFF ON CSEQ
Fig.4.6 Example of soft start circuit
¡When the voltage is applied to the terminal SEQ, the output volt-
age tracks this voltage until the output reaches the set-point volt-
age. SEQ terminal voltage vs output voltage is calculated the fol-
lowing formula.
Avoid SEQ terminal voltage is set below the set voltage output by
Rtrm, the output voltage does not rise to set output voltage. Maxi-
mum applicable voltage of terminal SEQ is Vin.When the function
is not used, open terminal SEQ.
CSEQ [mF] = (0.284 ÷ Vo[V]
- 0.06) × T[ms]
(0.6V [Vo [2.0V)
CSEQ [mF] = (0.284 ÷ Vo[V]
- 0.047) × T[ms]
(2.0V < Vo [3.63V only BRFS30)
SEQ
VOUT
Setting VOUT
Fig.4.7 SEQ > Vout setting
VOUT
Setting
SEQ
VOUT
Fig.4.8 SEQ < Vout setting (not recommended)
¡With the voltage to input into SEQ pin, you can control a start se-
quence of plural BRFS.
(a) The same time
R A
+VOUT A +VOUT B
BRFS A BRFS B
SEQ
GND GND
RCRC
+VOUT A
+VOUT B
VRCA
V
t
(b) The same voltage
+VOUT A +VOUT B
BRFS A BRFS B
SEQ
GND GND
V
RCRC
t
+VOUT A
+VOUT B
VRCA
R A
DC-DC Converters PCB Mount type Instruction Manual
BRFS-11
BRFS

(c) The time lag
+VOUT A +VOUT B
BRFS A BRFS B
RC
GND GND
SEQ
RC
+VOUT A
+VOUT B
V
RC
A
V
t
Fig.4.9 Example of sequence control
¡If this function is unnecessary, please make SEQ pin open.
4.7 Power good
¡By using PGOOD, it is possible to monitor power supply whether
normal operation or abnormal operation.
¡PGOOD circuit is designed as shown in Fig.4.10.
Sink current of PGOOD is 10mA max.
PGOOD 5V
GND
Fig.4.10 Internal PGOOD circuit
¡Voltage of PGOOD pin become low when over current protection
circuit is work, or output voltage is different from a set point more
than ±12.5%.
¡If this function is unnecessary, please make PGOOD pin open.
4.8 Sequence
¡Fig.4.11 is a sequence chart of each function of BRFS.
PGOOD
OUTPUT
INPUT
RC RC:ONRC:OFF
6.3ms(typ)
Start up
voltage Power supply start
over current
1.2s(typ) 6.3ms(max)
Fig.4.11 Sequence chart of BRFS
5 Series and Parallel Operation
5.1 Series operation
¡Series operation is not possible.
5.2 Parallel operation
¡Parallel operation is possible BRFS50/50L/60/100 (BRFS30/40 is
not possible)
¡BRFS40 has a parallel operation “P”.
¡In parallel operation, wiring as Fig.5.1
¡Make the +S and -S of the slave power supply unconected.
¡To improve the load sharing of each unit, use the same length and
same wire size from each unit to the load.
¡As variance of output current drew from each power supply is
maximum 10%, the total output current must not exceed the value
determined by the following equation.
(Output current at parallel operation)
=(the rated current per unit)×(number of unit)×0.9
BRFS
Master
BRFS
BRFS
+VIN
+VIN
+VIN
GND
+VOUT
+VOUT
+VOUT
VOUT
Adjustment
VI VNOUT
+TRM
-TRM
+TRM
-TRM
+TRM
-TRM
SHARE
GND
SHARE
GND
SHARE
Rtrm
Rtrm
Rtrm
Slave
Slave
100 W or less
+S
-S
+S
-S
+S
-S
Fig.5.1 Example of wiring method in parallel operation
¡Make power supply from the same input power supply.
¡Total number of units should be no more than 5 pieces.
¡PGOOD of slave power supply output the operating conditions.
When power supply is in operation, PGOOD output high level.
At the time of stop, it output low level.
¡Please connect each other’s SEQ pins if you use SEQ pin.
¡Voltage drop from a power supply to the sensing point should be
less than 0.2V for stable control.
¡Only use RC pin of the master power supply, RC pin of the slave
power supply should be short to GND.Or let RC pin’s of the master
power supply and the slave power supply short, and please use it.
¡If this function is unnecessary, please make SHARE pin open.
¡In parallel operation, please use a single model together. When it
is necessary to use different model together, please contact us.
DC-DC Converters PCB Mount type Instruction Manual
BRFS-12
BRFS

6 Implementation-Mounting Method
6.1 Mounting method
¡The unit can be mounted in any direction. When two or more pow-
er supplies are used side by side, position them with proper inter-
vals to allow enough air ventilation. The temperature around each
power supply should not exceed the temperature range shown in
derating curve.
6.2 Automatic Mounting
¡To mount BRFS series automatically, use the coil area near the
center of the PCB as an adsorption point. Please see the External
View for details of the adsorption point.
6.3 Soldering
¡Fig.6.1 shows condition for reflow of BRFS series. Please make
sure that the temperature of pin shown in Fig.6.2 do not exceed
the temperatures shown in Fig.6.1.
¡While soldering, having vibration or impact on the unit should be
avoided, because of solder melting.
time(s)
Ty1
Ty2
Tp
Tx
AABBC
(
C)
,,
A 1.0 - 5.0C/ s
A’ Ty1 : 160 10C
Ty2 : 180 10C
Ty1 - Ty2 : 120s max
B 1.0 - 5.0C/ s
B’ Tp : Max245C10s max
Tx : 220Cor more : 70s max
C 1.0 - 5.0C/ s
Fig.6.1 Recommended reflow soldering condition
SHARE SHARE
+VIN +VIN
+VOUT
+VIN
(a) BRFS30/40 (b) BRFS50/50L/60 (c) BRFS100
Fig.6.2 Measurement point of temperature
¡Please do not do the implementation except the reflow.
¡Because some parts drops, please do not do reflow of the back
side.
6.4 Cleaning
¡When cleaning is necessary, clean under the following conditions.
Method : Varnishing, ultrasonic wave and vapor
Cleaning agents : IPA (Solvent type)
Total time : 2 minutes or less
¡Do not apply pressure to the lead and name plate with a brush or
scratch it during the cleaning.
¡After cleaning, dry them enough.
6.5 Storage method
¡To stock unpacked products in your inventory, it is recommended
to keep them under controlled condition, 5-30C, 60%RH and use
them within a year.
¡24-hour baking is recommended at 125C, if unpacked products
were kept under uncontrolled condition, which is 30C, 60%RH or
higher.
Original reels are not heat-resistant. Please move them to heat-
resistant trays in preparation to bake.
To check moisture condition in the pack, silica gel packet has
some moisture condition indicator particles.
Indicated blue means good. Pink means alarm to bake it.
¡The reels will be deformed and the power supply might be dam-
aged, if the vacuum pressure is too much to reseal.
DC-DC Converters PCB Mount type Instruction Manual
BRFS-13
BRFS

7 Safety Considerations
¡To apply for safety standard approval using this power supply, the
following conditions must be met.
¿
This unit must be used as a component of the end-use equipment.
¿Safety approved fuse must be externally installed on input side.
8 Derating
8.1 BRFS series Derating
¡Make sure the temperatures measurement locations shown from
Fig.8.2 to Fig.8.6 below are on or under the derating curve in
Fig.8.1.
Ambient temperature must be kept at 85Cor under.
Load factor[%]
100
50
Temperature of measurement location[C]
-40
00120
Fig.8.1 Derating curve
Temperature measurement location
Point A Point B
Fig.8.2 Temperature measurement location (BRFS30)
Temperature measurement location
Point A
Fig.8.3 Temperature measurement location (BRFS40)
Point A
Temperature measurement location
Point B
Fig.8.4 Temperature measurement location (BRFS50/50L)
Temperature measurement location
Point A Point B
Fig.8.5 Temperature measurement location (BRFS60)
Temperature measurement location
Point A Point B
Fig.8.6 Temperature measurement location (BRFS100)
DC-DC Converters PCB Mount type Instruction Manual
BRFS-14
BRFS

9 Package Information
¡Please refer to a Fig.9.1 to Fig.9.4 for Package form (Reel).
¡The packed number is 200 (BRFS30/40), 100 (BRFS50/50L/60),
80 (BRFS100).
hModel
BRFS30
BRFS40 10.0 11.5
2±0.15 0.5±0.05
4±0.1
1.5
1.7
56.0±0.3
52.4±0.1
1.75±0.126.2±0.1
h±0.1
20±0.1
R0.75
+0.2
-0
14.2
+0.2 -0
33.7
+0.1
-0
f
1.5
A
B
B
A
B-B cross section
A-A cross section
Fig.9.1 Taping dimensions of BRFS30/40
1.5
0.5±0.05
10±0.1
26.2±0.1
2±0.15
4±0.1
1.7
56.0±0.3
52.4±0.1
1.75±0.1
32±0.1
R0.75
+0.2
-0
23.6
+0.1
-0
f1.5
+0.2 -0
33.7
B-B cross section
A-A cross section
B
A
B
A
Fig.9.2 Taping dimensions of BRFS50/50L/60
A
B
B
A
38.6
1.7
1.5
28.3
10 ± 0.1
R0.75
+0.2
- 0
+0.2 -
0
0.5±0.05
+0.1
-
0
f1.5
36±0.1
2±0.15
4±0.1
26.2±0.1
56.0±0.3
52.4±0.1
1.75±0.1
B-B cross section
A-A cross section
Fig.9.3 Taping dimensions of BRFS100
W2
W1
Hub Diameter
f330±2
f13±0.2
Model Tape Width
[mm]
Hub
Diameter
[mm]
W1
[mm] W2 [mm]
BRFS30/40 56 100 57.4±1.0 61.4±1.0
BRFS50/50L/60 56 150 57.5±1.0 61.5±1.0
BRFS100 56 150 57.5±1.0 61.5±1.0
Fig.9.4 Reel dimensions of BRFS
¡Please refer to specifications for the details of package informa-
tion
DC-DC Converters PCB Mount type Instruction Manual
BRFS-15
BRFS