FSGM300N View Datasheet(PDF) - Fairchild Semiconductor
Part Name
Description
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FSGM300N Datasheet PDF : 16 Pages
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Pin Configuration
Figure 3. Pin Configuration (Top View)
Pin Definitions
Pin #
1
2
3
4
5
6, 7, 8
Name
GND
VCC
FB
NC
VSTR
Drain
Description
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 VCC pin. Once VCC reaches 12V, the internal current
source (ICH) is disabled.
SenseFET Drain. High-voltage power SenseFET drain connection.
© 2009 Fairchild Semiconductor Corporation
FSGM300N • Rev. 1.0.3
3
www.fairchildsemi.com
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