Datasheet > HT7A6322

HT7A6322

更新时间： 2024-03-03 10:10:56

品牌	Logo	应用领域
台湾合泰/盛群 - HOLTEK		/
页数	文件大小	规格书
10页	1130K
描述
Low Power Primary Switcher for Off Line SMPS

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HT7A6322 数据手册

HT7A6322

Block Diagram

VCC

60kHz

Oscillator

Regulator

On/Off

Internal Supply

UVLO

OTP

Detector

PWM

Latch

8V/14.5V

38V

0.23V

LEB

Over Voltage

Latch

R_FB2

R_FB1

VSS

Pin Assignment

VSS

VCC

HT7A6322

8 SOP-A

HT7A6322

8 DIP-A

Pin Description

Pin No.

Pin Name

Description

Power MOSFET source and circuit ground reference.

8SOP

8DIP

1, 2

VSS

Feedback input. The useful voltage range extends from 0V to 1V, and

defines the peak drain MOSFET current. The current limitation, which

corresponds to the maximum drain current, is obtained when the FB pin is

shorted to the VSS pin.

Control circuit power supply. Also provides a charging current during start

up due to a high voltage current source connected to SW. For this purpose,

a hysteresis comparator monitors the V_CCvoltage and provides two

thresholds:

V_CCON: Voltage value (typically 14.5V) at which the device starts switching

and turns off the start up current source.

VCC

V_CCOFF: Voltage value (typically 8V) at which the device stops switching and

turns on the start up current source.

Power MOSFET drain. Also used by the internal high voltage current

source during the start up phase to charge the external V_CCcapacitor.

5, 6, 7, 8

Rev. 1.20

January 18, 2018

123 4 5 6 7...10

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