FSCM0765R

3

Pin Definitions

Pin Configuration

Figure 3. Pin Configuration (Top View)Absolute Maximum Ratings

Pin Number

Pin Name

Pin Function Description

1Drain

This pin is the high voltage power SenseFET drain. It is designed to drive the

transformer directly.

2

GND

This pin is the control ground and the SenseFET source.

This pin is the positive supply voltage input. Initially, During start up, the power is

supplied through the startup resistor from DC link. When Vcc reaches 12V, the

power is supplied from the auxiliary transformer winding.

4

Feedback (FB)

This pin is internally connected to the inverting input of the PWM comparator.

The collector of an optocoupler 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 not connected.

6I_limit

This pin is for the pulse by pulse current limit level programming. By using a

resistor to GND on this pin, the current limit level can be changed. If this pin is

left floating, the typical current limit will be 3.0A.

1 : Drain

2 : GND

6 : I_limit

4 : FB

3 : Vcc

5 : N.C.

D2-PAK-6L

1. Drain

2. GND

3. Vcc

4. FB

6. I_limit

5. N.C.

TO-220-6L

FSCM0765RJ

FSCM0765RG

I2-PAK-6L

FSCM0765RI

1 : Drain

2 : GND

6 : I_limit

4 : FB

3 : Vcc

5 : N.C.