FSDM07652RB Fairchild Semiconductor, FSDM07652RB Datasheet - Page 3

• Manufacturer Part Number: FSDM07652RB
• Description: SMPS Power Switch, Built-in Soft Start Improved (Green)
• Manufacturer: Fairchild Semiconductor

Pin Definitions
Pin Configuration
Pin Number
1
2
3
4
5
6
Pin Name
Drain
GND
Vstr
Vcc
N.C
Vfb
This pin is the high voltage power Sense FET drain. It is designed to drive the
transformer directly.
This pin is the control ground and the Sense FET source.
This pin is the positive supply voltage input. During start up, the power is sup-
plied by an internal high voltage current source that is connected to the Vstr pin.
When Vcc reaches 12V, the internal high voltage current source is disabled and
the power is supplied from the auxiliary transformer winding.
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 6.0V, the over load protection is activated resulting in shutdown of the
FPS
-
This pin is connected directly to the high voltage DC link. At startup, the internal
high voltage current source supplies internal bias and charges the external ca-
pacitor that is connected to the Vcc pin. Once Vcc reaches 12V, the internal cur-
rent source is disabled.
Figure 3. Pin Configuration (Top View)
TM
.
TO-220F-6L
Pin Function Description
6.Vstr
5.N.C.
4.Vfb
3.Vcc
2.GND
1.Drain
FSDM07652RB
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