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PDF SM6704A Data sheet ( Hoja de datos )

Número de pieza SM6704A
Descripción 4-Channel Constant Current LED Driver
Fabricantes SamHop 
Logotipo SamHop Logotipo



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No Preview Available ! SM6704A Hoja de datos, Descripción, Manual

4-Channel Constant Current LED Driver
SM6704A
GENERAL DESCRIPTION
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.
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 (150shutdown 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
APPLICATIONS
High-Flux LED and architectural lighting
LCD backlight , LED signs and displays
Automotive interior lighting
TYPICAL APPLICATION CIRCUIT
www.samhop.com.tw
1
Rev. 1.0 @ 2010 /06

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