DM0565R View Datasheet(PDF) - Fairchild Semiconductor

Part Name

Description

View to exact match

DM0565R

Green Mode Fairchild Power Switch (FPS)

Fairchild Semiconductor 

Pin Definitions

FSDM0565R

Pin Number

1

2

3

4

5

6

Pin Name

Drain

GND

Vcc

Vfb

N.C

Vstr

Pin Function Description

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

FPSTM.

-

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.

Pin Configuration

TO-220F-6L

6.Vstr

5.N.C.

4.Vfb

3.Vcc

2.GND

1.Drain

Figure 3. Pin Configuration (Top View)

3

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