User Guide

79
S-301
BD9781HFP (IC810: 1U-3695)
BD9002HFP (IC811: 1U-3695)
SN74LVC1G373 (IC111: 1U-3693)
1234567
BD9781HVFP
5
3
4
1
2
7
6
5~35V
V IN
INV
Vre f
OSC
FB
RT
CURRENT LIMIT
ERROR AMP
PWM
SW
EN/SYNC
RESET
COMPARATOR
SOFT
START
24KΩ
10KΩ
150KΩ
390KΩ
4700μF
220μF
33μH
330μF
1μF
0.1μF
LATCH
Vref SYNC
ON/OFF
L:OFF
H:ON
TSD
V IN
GND
VO
DRIVER
1234567
BD9002HVFP
5
7
4
1
2
3
V IN
INV
Vre f
OSC
FB
SS
RT
CURRENT LIMIT
ERROR AMP
PWM
SW
RESET
COMPARATOR
LATCH
Vre f
UVLO
TSD
V IN
GND
DRIVER
6
1
2
3
6
5
4
LE
GND
D
OE
V
CC
Q
logic diagram (positive logic)
OE
6
1
3
4
LE
D
C
D
Q