HT2273

2/10

Current Mode PWM Controller

www.hotchip.com.cn

Ver1.0

Typical Application Circuit

Pin Configuration

Pin Function Description

Pin

Name

Pin

Number

Pin Type

Function Description

GND

1

GND

Ground.

FB

2

Feedback Input

Feedback input pin. The PWM duty cycle is determined by

voltage level into this pin and the current-sense signal at Pin

4. The internal protection circuit will automatically shutdown

when the FB voltage level exceeds a preset threshold

voltage.

RT

3

OTP Setting

Dual function pin. Either connected through a NTC resistor to

ground for over temperature shut down/latch control or

connected through Zener to VCC for adjustable over voltage

protection.

CS

4

Current Monitoring

Current sense input.

VCC

5

Power

Power supply

GATE

6

Gate-driven output

Totem-pole gate driver output for power MOSFET.