FSGM0465RB Fairchild Semiconductor, FSGM0465RB Datasheet - Page 3

• Manufacturer Part Number: FSGM0465RB
• Description: The FSGM0465RB is an integrated Pulse Width Modulation (PWM) controller and SenseFET specifically designed for offline Switch-Mode Power Supplies (SMPS) with minimal external components
• Manufacturer: Fairchild Semiconductor

© 2009 Fairchild Semiconductor Corporation
FSGM0465RB • Rev. 1.0.2
Pin Configuration
Pin Definitions
Pin #
1
2
3
4
5
6
Name
Drain
GND
N.C.
V
V
FB
STR
CC
SenseFET Drain. High-voltage power SenseFET drain connection.
Ground. This pin is the control ground and the SenseFET source.
Power Supply. This pin is the positive supply input, which provides the internal operating
current for both startup and steady-state operation.
Feedback. This pin is internally connected to the inverting input of the PWM comparator.
The collector of an opto-coupler is typically tied to this pin. For stable operation, a capacitor
should be placed between this pin and GND. If the voltage of this pin reaches 6V, the
overload protection triggers, which shuts down the FPS.
No Connection.
Startup. This pin is connected directly, or through a resistor, to the high-voltage DC link.
At startup, the internal high-voltage current source supplies internal bias and charges the
external capacitor connected to the V
source (I
CH
) is disabled.
Figure 3. Pin Configuration (Top View)
3
CC
pin. Once V
Description
CC
reaches 12V, the internal current
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