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Features

• Precision Fixed Operating Frequency (100/67/50kHz)

• Low Start-up Current (Typ. 100uA)

• Pulse by Pulse Current Limiting

• Over Load Protection

• Over Voltage Protection (Min. 25V)

• Internal Thermal Shutdown Function

• Under Voltage Lockout

• Internal High Voltage Sense FET

• Auto-Restart Mode

Description

The Power Switch product family is specially designed for

an off-line SMPS with minimal external components. The

Power Switch consist of high voltage power SenseFET and

current mode PWM IC. Included PWM controller features

integrated fixed oscillator, under voltage lock out, leading edge

blanking, optimized gate turn-on/turn-off driver, thermal shut

down protection, over voltage protection, and temperature

compensated precision current sources for loop

compensation and fault protection circuitry-compared to

solution. The Power Switch can reduce total component count,

design size, weight and at the same time increase efficiency,

productivity, and system reliability. It has a basic platform

well suited for cost-effective design in either a flyback

converter or a forward converter.

TO-220F-4L

8-DIP

TO220-5L

1

1

1

1. Drain

2. GND

3. Vcc

4. FB

5. S/S

1.6.7.8. Drain

2. GND

3. Vcc

4. FB

5. NC

1. GND

2. Drain

3. Vcc

4. FB

uA

Internal Block Diagram

32V

5

µA

5V

2.5R

1R

1mA

0.1V

+

−

OVER VOLTAGE S/D

+

−

7.5V

27V

Thermal S/D

S

R

Q

Power on reset

+

−

L.E.B

S

R

Q

OSC

5V

Vref

Internal

bias

Good

logic

SFET

DRAIN

GND

FB

Soft Start

9V

*

* KA5H0265RC

KA5x02xx-SERIES

KA5H0265RC, KA5M0265R, KA5L0265R,

KA5H02659RN/KA5M02659RN, KA5H0280R,

KA5M0280R

Power Switch