WS3255D8P Datasheet, PDF (2/9 Pages) Shenzhen Winsemi Microelectronics Co., Ltd – High Precision Primary-Side Off-line PWM Power Switch

WS3255 Product Description
Typical Application Circuit
AC
N_S
N_P
V_O
C_O
VCC ^GND
COMP ^{G ND}
IN V G ra in
CS
G ra in
R_S ^{W S3 2 5 5}
N_{A U X}
Pin Definition and Device Marking
WS3255 is available in DIP8 package:
1
VCC
2
COMP
3
IN V
4
CS
D IP 8
8 _GND
7
GND
6
D R A IN
5
D R A IN
WS3255D8P
A1a
2C
D: DIP8 P: no Pb
A:wafer information;
1:Ver.; a: Package Code
2C:Y+M(2=2012 C=12 Month
(1,2…A=10,B=11,C=12)
Pin Function Description
Pin
Name
Pin
Number
VCC
1
2
COMP
INV
3
4
CS
5/6
DRAIN
GND
7/8
Pin Type
Function Description
Power
Loop
Compensation
Feedback Input
Current
Monitoring
Power transistor
drain
GND
Power supply
Loop Compensation for CV Stability
The voltage feedback from auxiliary winding. Connected to resistor
divider from auxiliary winding reflecting output voltage. PWM duty
cycle is determined by EA output and current sense signal at pin4.
Current sense input.
This pin connects directly to the primary lead of the transformer.
Ground
WIN SEM I M ICROELECTRON ICS
WIN SEM I M ICROELECTRON ICS
WIN SEM I M ICROELECTRON ICS
www.winsemi.com Tel : [phone] Fax : [phone]
WIN SEM I M ICROELECTRON ICS
WIN SEM I M ICROELECTRON ICS
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