Datasheet > HT7L4091V110

HT7L4091V110

更新时间： 2022-07-03 15:42:00

品牌	Logo	应用领域
其他 - ETC		/
页数	文件大小	规格书
26页	1145K
描述
Universal Step-Down PWM Control For High Brightness LED Lighting Control

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HT7L4091V110 数据手册

HT7L4091

Universal Step-Down PWM Control

For High Brightness LED Lighting Control

Features

Input supply AC voltage range: 100V~240V

●

Ultra Low Power-on Start-up current < 30μA

Integrated 25V Zener diode internally connected to VIN pin

5V LDO output voltage with 6mA driving current for external components

Frequency jitter function for enhanced EMI performance

Efﬁciency > 85%

Under Voltage Lockout Function - UVLO

Current mode operation with cycle-by-cycle current limiting

Over Temperature Protection Function

High-current FET Drive Output

Linear and PWM Dimming Function

Enhanced Short Circuit Protection Function

Applications

AC/DC and DC/DC Power control For High Power LED Lighting

●

RGB back lighting LED driver

Flat Panel Displays Back Lighting

General Purpose Constant Current Source

Signage and Decorative LED lighting

Battery Chargers

General Description

The HT7L4091 device provides a low-cost solution for active current mode PWM controls of High

Intensity LED drive systems supplied by either AC or DC line power lines. The device operates

in constant off-time mode which is suitable for buck LED drivers. The low start-up and operating

currents provides flexible power requirements for high efficiency or low cost applications. The

switch frequency off-time can be programmed using an external resistor. The peak current mode

control achieves good output current regulation without requiring loop compensations for a wide

range of input voltages.

Included in the device is a PWM dimming input which can accept an external control signal with a

duty ratio from 0 to 100%. The output current can be programmed from 0 to 250mA by applying an

external control voltage on the linear dimming control input.

The device includes a frequency jitter function which helps to reduce EMI power supply emissions.

from damage should the LEDs be short circuited. .

The device requires a minimum number of external standard components and is available in an 8-pin

NSOP package for small area PCB applications.

Ordering Information

Part Number.

Function Description

Fꢂequency Jitteꢂ Function Enaꢁled

HT7L4091

HT7L4091-1

Fꢂequency Jitteꢂ Function Disaꢁled

Rev. 1.10

�oveꢀꢁeꢂ 01ꢃ ꢄ011

1 2 345 6 7...26

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