FSFM261 Fairchild Semiconductor, FSFM261 Datasheet - Page 3

• Manufacturer Part Number: FSFM261
• Description: The FSFM260N/261N/300N is an integrated Pulse Width Modulator (PWM) and SenseFET specifically designed for high-performance offline Switch Mode Power Supplies (SMPS) with minimal external components
• Manufacturer: Fairchild Semiconductor

FSFM260N / FSFM261N / FSFM300N • Rev. 1.0.1
© 2009 Fairchild Semiconductor Corporation
Application Diagram
Internal Block Diagram
I
FB
LIM
3
4
V
CC
V
I
CC
delay
V
V
OVP
SD
V
CC
TSD
V
I
FB
BURL
AC
IN
/V
BURH
2.5R
I
LIM
R
Normal
Figure 1. Typical Flyback Application
FB
Burst
Figure 2. Internal Block Diagram
LPF
PWM
Soft-
Start
V
V
CC
CC
PWM
good
V
STR
GND
3
Drain
250ns
LEB
OSC
S
R
Q
Q
S
R
Q
Q
V
5
str
V
ref
FSFM260 Rev. 00
V
CC
good
V
O
driver
Gate
V
V
OCP
8V/12V
2
CC
V
CC
FSFM260 Rev.00
6
Drain
7
8
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1
GND