pt4207 China Resources Powtech (Shanghai) Co., Ltd, pt4207 Datasheet - Page 2

• Manufacturer Part Number: pt4207
• Description: Universal High Brightness Led Driver
• Manufacturer: China Resources Powtech (Shanghai) Co., Ltd

PIN ASSIGNMENT
PIN DESCRIPTIONS
China Resources Powtech (Shanghai) Limited
PT4207_DSB Rev EN_0.2
AC IN
No,
1
2
3
4
5
6
7
8
SOURCE
GATE
Name
GND
VDD
DIM
EXT
Toff
CS
BD
FUSE
Dim signal input. This pin can accept either a 0.5V~2.5V analog dim signal or a PWM dim
signal
Off time setting pin, off time is programmed by a resistor from this pin to GND
Ground connection
LED current sense input, connect a resistor from CS to GND to set peak LED current
Internal low side switch drain output, connect this pin to the source of high side MOSFET.
High side MOSFET gate bias pin, must connect a bypass capacitor from this pin to GND
Power supply input pin, must be locally bypassed
Low side extended MOSFET drive pin. Floating this pin if use internal switch, if external
low side switch is used, connect this pin to the gate of external low-side MOSFET.
D2
Use external low side power switch, for >350mA applacation
D3
400V
68µF
400V
68µF
C1
C2
D4
10uF
C3
WWW.CRPOWTECH.COM
Universal High Brightness LED Driver
7
2
3
1
100K
R1
VDD
GND
Toff
DIM
SOURCE
Description
GATE
EXT
CS
6
5
8
4
4.7µF
1M
R3
C4
Q1
Q2
SBD
D5
0.71
R2
LED(s)
2mH
L1
PT4207
4.7uF
C5
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