Datasheet > SC441A_10

SC441A_10

更新时间： 2024-09-16 06:10:15

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商升特 - SEMTECH		驱动
页数	文件大小	规格书
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描述
High Efficiency Integrated Driver for 4-Strings of 150mA LEDs

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SC441A_10 数据手册

SC441A

High Eﬃciency Integrated Driver for

4-Strings of 150mA LEDs

POWER MANAGEMENT

Features

Description

Wide input voltage range from 4.5V to 21V

36V maximum output voltage

Drives up to 40 WLEDs in 4 strings

Programmable LED current for up to 150mA per

string

+/- 2% string-to-string current matching

Up to 90% eﬃciency

Wide 0.2% to 100% PWM dimming range

The SC441A is a high-eﬃciency multiple string WLED driv-

er with an integrated boost converter. It operates over a

wide input range from 4.5V to 21V with a maximum out-

put voltage of 36V and a 3.0A internal power switch. It

can drive up to forty WLEDs in 4 strings with current up

to 150mA per string. The string-to-string current match-

ing is 2% typical, 3% maximum. The overall eﬃciency is

greater than 90% due to the low current sense voltage

and a low-impedance internal power switch. The wide

PWM dimming range boasts a ratio of 500: 1.

Possible analog dimming

Integrated 3.0A power switch

700KHz switching frequency for small size

Adjustable OVP for cost-eﬀective output cap selection

Open/short LED protection

Thermal protection with auto-recovery

Thermally enhanced TSSOP-20 EDP package

Fully WEEE and RoHS compliant

The 700KHz switching frequency enables the user to op-

timize the external component sizes for eﬃciency. When

there are fewer than 10 LEDs in each string, users can ad-

just the output voltage protection yielding an allowable

reduction in associated costs, size and voltage ratings of

the output capacitor.

AEC-Q100 Grade 3 qualiﬁed

The SC441A also features comprehensive open and short-

circuit LED protection functions. It disables the corre-

sponding strings with LED open or LED short conditions

while maintaining normal operation of other, unaﬀected

LED strings. This feature allows LCD panels to remain view-

able even under LED failure, wire disconnect, or short-cir-

cuit conditions. The internal thermal shutdown protects

the IC from overheating at abnormal conditions.

Applications

Medium-sized LCD panel

Notebook Display

Automotive Car Navigation Display

Sub-Notebook and Tablet Computer Displays

Portable Media Players

The SC441A is available in a thermally-enhanced TSSOP-

20 EDP package.

Typical Application Circuit

Vin (4.5V -21V)

VIN

VOUT

4 Strings

OVPIN

FFLAG

PWM

OVPRTN

SC441A

IO1-4

IO1- 4

COMP

IOSET

AGND

IOGND

PGND

EDP

www.semtech.com

January 18, 2010

中文翻译

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与SC441A_10相关器件

型号	品牌	获取价格	描述	数据表
SC441AEVB	SEMTECH	获取价格	High Efficiency Integrated Driver for 4-Strings of 150mA LEDs
SC441ATETRT	SEMTECH	获取价格	High Efficiency Integrated Driver for 4-Strings of 150mA LEDs
SC441C	SEMTECH	获取价格	High Efficiency Integrated Driver for 4-Strings of 150mA LEDs
SC441CTETRT	SEMTECH	获取价格	LED Driver, PDSO20,
SC441D	SEMTECH	获取价格	High Efficiency Integrated Driver for 4-Strings of 150mA LEDs
SC441DEVB	SEMTECH	获取价格	High Efficiency Integrated Driver for 4-Strings of 150mA LEDs
SC441DTETRT	SEMTECH	获取价格	High Efficiency Integrated Driver for 4-Strings of 150mA LEDs
SC442	SEMTECH	获取价格	10-Channel, Integrated, High Efficiency 120 White LED Driver
SC443	SEMTECH	获取价格	High Efficiency Integrated Boost Driver for 3-Strings of 30mA LEDs
SC4431	SEMTECH	获取价格	SHUNT REGULATOR WITH OPEN COLLECTOR OR OUTPUT

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