HV9925

更新时间： 2024-09-30 03:43:11

品牌	Logo	应用领域
超科 - SUPERTEX		驱动
页数	文件大小	规格书
10页	1302K
描述
Programmable-Current LED Lamp Driver IC with PWM Dimming

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中文翻译

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数据手册

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HV9925 数据手册

HV9925

Initial Release

Programmable-Current LED Lamp Driver IC

with PWM Dimming

Features

General Description

 Programmable Output Current to 50mA

 PWM Dimming / Enable

 Universal 85-264VAC Operation

 Fixed OFF-Time Buck Converter

 Internal 500V Power MOSFET

 Over Temperature Protection with Hysteresis

The HV9925 is a pulse width modulated (PWM) high-efﬁciency

LED driver control IC with PWM dimming capabilities. It

allows efﬁcient operation of high brightness LED strings from

voltage sources ranging up to 400VDC. The HV9925 includes

an internal high-voltage switching MOSFET controlled with a

ﬁxed off-time T_OFFof approximately 10µs. The LED string is

driven at constant current, thus providing constant light output

and enhanced reliability. Selecting a value of a current sense

resistor can externally program the output LED current of the

HV9925. The peak current control scheme provides good

regulation of the output current throughout the universal AC

line voltage range of 85 to 264VAC or DC input voltage of

20 to 400V. The HV9925 is designed with a built in thermal

shutdown to prevent excessive power dissipation in the IC.

Applications

 Decorative Lighting

 Low Power Lighting Fixtures

Typical Application Circuit

LED₁

C_IN

C_O

LED_N

BR1

Drain

Enable

PWMD

HV9925

V_DD

R_SENSE

GND

C_DD

R_SENSE

NR021506

12 3 4 5 6 7...10

中文翻译

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