SM6704A datasheet(1/1 Pages) SAMHOP

Teilenummer	SM6704A

Bauteilbeschribung	4-Channel Constant Current LED Driver

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Hersteller	SAMHOP [SamHop Microelectronics Corp.]

Direct Link	http://www.samhop.com.tw

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4-Channel Constant Current LED Driver

GENERAL DESCRIPTION

SM6704A

FEATURES

● 4-Channel constant sink current

● Constant output current invariant to load

voltage change

● Maximum output current per channel up to

180mA

● Output current adjusted through an external

resistor

● Excellent output current accuracy :

- Between channels: ±3% , and

- Between ICs: ±6% (Max.)

● Protected functions:

- Over temperature (150℃ shutdown IC)

- String short circuit detection

● Low dropout current source (0.6V at 180mA)

● LED output voltage up to 50V

● Supply voltage range from 9V to 50V

● Package SOP-8 with thermal pad

● High-Flux LED and architectural lighting

● LCD backlight , LED signs and displays

● Automotive interior lighting

APPLICATIONS

TYPICAL APPLICATION CIRCUIT

www.samhop.com.tw

1

Rev. 1.0 @ 2010 /06

The SM6704A is a 4-channel constant current LED

driver that has a wide range of output current from

20mA to 180mA per channel and through an

external resistor (Rext) to set the maximum sink

current which gives users flexibility in controlling the

light intensity of LEDs. In addition, users can

precisely adjust LED brightness from 0% to 100%

via OE control pin using popular pulse width

modulation (PWM) signal. Low output voltage drop

operation of 0.6V at 180mA allows for more power

efficient designs across wider supply voltage range,

the 4 LED pins are compatible with high voltage up

to 50V supporting applications with long strings of

LEDs. Additionally, to ensure the system reliability,

the SM6704A is contained with LED string short

circuit detection and thermal shutdown function to

protect IC from over temperature 150℃. Also, the

thermal pad enhances the power dissipation. As a

result, a large amount of current can be handled

safely in one package.

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