Rohm BD7695FJ User manual

Power Factor Correction
Boundary Current Mode Method
BD7695FJ Reference Board

Notice
www.rohm.com HVB01E
© 2018 ROHM Co., Ltd. All rights reserved.
＜
High Voltage Safety Precautions
＞
◇
Read all safety precautions before use
Please note that this document covers only the BD7695FJ evaluation board
(BD7695FJ-EVK-001) and its functions. For additional information, please refer to the
datasheet.
To ensure safe operation, please carefully read all precautions before
handling the evaluation board
Depending on the configuration of the board and voltages used,
Potentially lethal voltages may be generated.
Therefore, please make sure to read and observe all safety precautions described in
the red box below.
Before Use
[1] Verify that the parts/components are not damaged or missing (i.e. due to the drops).
[2] Check that there are no conductive foreign objects on the board.
[3] Be careful when performing soldering on the module and/or evaluation board to ensure that solder
splash does not occur.
[4] Check that there is no condensation or water droplets on the circuit board.
During Use
[5] Be careful to not allow conductive objects to come into contact with the board.
[6] Brief accidental contact or even bringing your hand close to the board may result in
discharge and lead to severe injury or death.
Therefore, DO NOT touch the board with your bare hands or bring them too close to the board.
In addition, as mentioned above please exercise extreme caution when using conductive tools such as
tweezers and screwdrivers.
[7] If used under conditions beyond its rated voltage, it may cause defects such as short-circuit or,
depending on the circumstances, explosion or other permanent damages.
[8] Be sure to wear insulated gloves when handling is required during operation.
After Use
[9] The ROHM Evaluation Board contains the circuits which store the high voltage. Since it stores the
charges even after the connected power circuits are cut, please discharge the electricity after using
it, and please deal with it after confirming such electric discharge.
[10] Protect against electric shocks by wearing insulated gloves when handling.
This evaluation board is intended for use only in research and development facilities and
should by handled only by qualified personnel familiar with all safety and operating
procedures.
We recommend carrying out operation in a safe environment that includes the use of high
voltage signage at all entrances, safety interlocks, and protective glasses.

1/14
© 2022 ROHM Co., Ltd.
No. 65UG030E Rev.001
Oct.2022
User’s Guide
PFC (power Factor Correction) IC
PFC BCM (Boundary Current Mode) Method
Output 200 W 400 V
BD7695FJ Reference Board
BD7695FJ-EVK-001
The BD7695FJ-EVK-001 reference board outputs 400 V voltage from the input of 90 Vac to 264 Vac. The output current supplies up
to 0.5 A. The BD7695FJ which is BCM method PFC controller IC is used.
The BD7695FJ supplies the system which is suitable for all of products that requires PFC.
BCM is used for PFC part, and Zero Current Detection reduces both switching loss and noise.
THD is less than 8 %.
Electronics Characteristics
Not guarantee the characteristics, is representative value.
Unless otherwise noted; V
IN
= 230 Vac, I
OUT
= 0.5 A, Ta = 25 °C
Parameter Min Typ Max Units Conditions
Input Voltage Range V
IN
90 230 264 Vac
Input Frequency f
LINE
47 50/60 63 Hz
Output Voltage V
OUT
376 395 415 V
Maximam Output Power P
OUT
- - 200 W I
OUT
= 0.5 A
Output Current Range
(Note 1)
I
OUT
0.0 - 0.5 A
Total Harmonic Distortion(THD) THD 4.8 8 %
PF(Power Factor) PF 0.93 0.99 - - AC230 V I
OUT
= 0.5 A
Efficiency η 92 97.4. - %
Output Ripple Voltage
(Note 2)
V
R
- 10.8 20 Vpp AC90 V I
OUT
= 0.5 A
Hold Time T
HOLD
20 ms V
OUT
min 280 V
Operating Temperature Range T
OP
-10 +25 +65 °C
(Note 1) Cool the component surface temperature with FAN, etc., if necessary, and the load application time so that the temperature does not exceed 105
℃
.
(Note 2) Not include spike noise

2/14
© 2022 ROHM Co., Ltd.
No. 65UG030E Rev.001
Oct.2022
User’s Guide
BD7695FJ-EVK-001
Operation Procedure
1. Operation Equipment
1. AC power supply 90 to 264 Vac, over 200 W
2. Electronic load capacity 0.5 A which supports input voltage 500 V
3. Multi meter
4. Power meter
2. Connect Method
1. AC power supply presetting range 90 to 264 Vac, Output switch is OFF.
2. Electronic load setting under 0.5 A, Load switch is OFF.
3. The reference board connects to measuring equipments and power supplies as in Figure. 1.
4. AC power supply switch is ON.
5. Check that output voltage is 400 V.
6. Electronic load switch is ON.
7. Operate with enough caution against electric shock because of non-isolated output voltage 400 V.
Figure 1. Connection Circuit

3/14
© 2022 ROHM Co., Ltd.
No. 65UG030E Rev.001
Oct.2022
User’s Guide
BD7695FJ-EVK-001
Derating
Maximum output power Po of the reference board is 200 W. The derating curve is shown in Figure. 2.
If ambient temperature is over 40 °C, Consider the load current time and air-cool with FAN so that the component
surface temperature does not exceed 105 ℃.
Figure 2. Temperature derating curve

4/14
© 2022 ROHM Co., Ltd.
No. 65UG030E Rev.001
Oct.2022
User’s Guide
BD7695FJ-EVK-001
Schematics
V
IN
= 90 to 264 Vac, V
OUT
= 400 V
Figure 3. BD7695FJ-EVK-001 Schematics

5/14
© 2022 ROHM Co., Ltd.
No. 65UG030E Rev.001
Oct.2022
User’s Guide
BD7695FJ-EVK-001
Bill of Materials
Materials may be changed without notifying.
Item Specifications Parts name Manufacture
C1 220 nF, 310 Vac 890334025027CS WURTH ELECTRONIK
C2,C3,C4 470 nF, 310 Vac 890334025039CS WURTH ELECTRONIK
C5 220 µF, 450 V LGN2W221MELA40 NICHICON
C6,C7,C9,C10,C12,C19
- NON MOUNTED
C8 1 μ,25V TMK107B7105KA-T Taiyou yuden
C11 220 pF, 2k V 885342209008_ WURTH ELECTRONIK
C13,C14 2200 pF, 300 V DE1E3RA222MJ4BP01F MURATA
C15 0.1 µF, 630 Vdc 890324023023CS WURTH ELECTRONIK
C16 0.01 µF, 50 V 885012206089 WURTH ELECTRONIK
C18 22 µF, 50 V 860080672001 WURTH ELECTRONIK
CN1 3pin B03P-NV(LF)(SN) JST
CN2 3pin 691137910003 WURTH ELECTRONIK
D1 FRD, 10 A, 600 V RFNL10TJ6S ROHM
D3 3 A, 1k V 1N5408G ROHM
D4,D6 FRD, 0.5 A, 200 V RF05VAM2S ROHM
DA1 600 V, 10 A GBU10J-U1 WILLAS Corp
F1 310 Vac, 3.15 A 36913150000
FL1 35 mH / 3.5 A 7748040435 WURTH ELECTRONIK
FL2 20 mH/ 3 A 744825320 WURTH ELECTRONIK
HEAT1,HEAT3 11.5 K/W 30PBE30-30B MARUSAN ELECTRONICS
HEAT2 22.9 k/W IC-1625-STL SANKYO THRMOTECH
IC1 BD7695FJ ROHM
L1 230 µH 7.4A PFC3819QM-231K07D-50 TDK
L2 90 µH 7447013 WURTH ELECTRONIK
LF3 60 µH LF1246Y ALPHA TRANS
Q1 600 V, 24 A R6024KNX ROHM
R1,R5,R6 750 kΩ KTR18EZPF7503 ROHM
R2 680 kΩ KTR18EZPF6803 ROHM
R3 9.1 kΩ MCR03EZPFX9101 ROHM
R7,R8 10 kΩ MCR03EZPJ103 ROHM
R9,R12 220 Ω ESR18EZPJ221 ROHM
R10 100 Ω ESR18EZPJ101 ROHM
R11 10 Ω ESR18EZPJ100 ROHM
R13 15 kΩ ESR18EZPJ153 ROHM
R15,R16 220 mΩ LTR50EZPZFLR220 ROHM
R17 10 Ω/2 W PCF2C100K KOA
R20,R21,R22 130 kΩ ESR18EZPJ134 ROHM
R23,R24 270 kΩ ESR18EZPJ274 ROHM
R25 47 kΩ ESR18EZPJ473 ROHM
SCREW1,SCREW2,SCREW3
P-4 3MC 3x8 YAWATANEJI
TH1 2 Ω, 4 A 2D2-13LD SEMITEC
ZNR1,R4,R14,R18 - NON MOUNTED
PCB PCB0237B

6/14
© 2022 ROHM Co., Ltd.
No. 65UG030E Rev.001
Oct.2022
User’s Guide
BD7695FJ-EVK-001
PCB
Size: 200 mm x 112 mm
Figure 4. Top Silkscreen (Top view)
Figure 5. Bottom Layout (Top view)

7/14
© 2022 ROHM Co., Ltd.
No. 65UG030E Rev.001
Oct.2022
User’s Guide
BD7695FJ-EVK-001
BD7695FJ Overview
Feature
 Boundary Conduction Mode PFC
 Low THD Circuit Incorparation
 VCC Under Voltage Lock Out Function
 ZCD by Auxiliary Winding
 Static OVP by The VS Pin
 Error Amplifier Input Short Protection
 Stable MOSFET Gate Driving
 Soft Start Function
Key Specification
 Operating Power Supply Voltage Range 12.0 V to 38.0 V
 Circuit Current 0.58 mA ( Typ.)
 Operating Temperature Range -40 °C to +105 °C
Package W(Typ) x D(Typ) x H(Max)
SOP-J8 4.90 mm x 6.00 mm x 1.65 mm
Pitch 1.27 mm
Table 1. BD7695FJ PIN description
Pin No. Pin Name I/O Function ESD Diode
VCC GND
1 VS I Feedback input pin - ○
2 EO O Error amp output pin - ○
3 MULT I Multiplier input pin - ○
4 CS I Over current protection pin - ○
5 ZCD I Zero current detection pin - ○
6 GND - GND pin ○ -
7 OUT O External MOSFET driver pin - ○
8 VCC I Power supply pin - ○
Figure 6. Block Diagram

8/14
© 2022 ROHM Co., Ltd.
No. 65UG030E Rev.001
Oct.2022
User’s Guide
BD7695FJ-EVK-001
Performance Data
Load Regulation
Figure 7. Load Regulation (V
oUT
vs P
OUT
) Figure 8. Line Regulation (V
OUT
vs V
IN
)
Figure 9. Tatal Harmonic Distortion (THD vs V
IN
) Figure 10. Power Factor (PF vs V
IN
)
380.00
385.00
390.00
395.00
400.00
405.00
410.00
415.00
420.00
80 180 280
VOUT (V)
VIN(V
)
VOUT vs VIN
Po=200W
0.00
2.00
4.00
6.00
8.00
10.00
12.00
14.00
16.00
18.00
20.00
80 180 280
THD (%)
VIN(V
)
THD vs VIN
100W
150W
200W
0.5
0.55
0.6
0.65
0.7
0.75
0.8
0.85
0.9
0.95
1
80 180 280
PF
V
IN
(V
)
PF vs V
IN
200Ｗ