FSDM0465RB Ver la hoja de datos (PDF) - Fairchild Semiconductor

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componentes Descripción

Fabricante

FSDM0465RB

Green Mode Fairchild Power Switch (FPS™)

Fairchild Semiconductor 

Pin Description

FSDM0465RB

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 SenseFET drain. It is designed to drive the

transformer directly.

This pin is the control ground and the SenseFET 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 Assignments

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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