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XRP7620IH-F Datasheet(PDF) 1 Page - Exar Corporation

Part # XRP7620IH-F
Description  4-Channel Adjustable Current I2C Controlled LED Driver
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Manufacturer  EXAR [Exar Corporation]
Direct Link  http://www.exar.com
Logo EXAR - Exar Corporation

XRP7620IH-F Datasheet(HTML) 1 Page - Exar Corporation

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June 2009
Rev. 1.0.0
Exar Corporation
www.exar.com
48720 Kato Road, Fremont CA 94538, USA
Tel. +1 510 668-7000 – Fax. +1 510 668-7001
GENERAL DESCRIPTION
The XRP7620 is a multi purpose 4-channel
independently adjustable current sink driver.
Optimized
for
LED
backlighting
and
RGBW/RGBA color mixing applications, the
XRP7620 can also be used as a generic
software programmable current sink I/O
expander.
Supporting an industry standard 2-wire I2C
serial interface, the XRP7620 provides full
independent control of each channel and can
be programmed up to a current of 31.5mA in
steps of 0.5mA. Uniform display brightness is
ensured through better than 3% channel to
channel current matching.
Five internal registers are provided to set
operational
configuration
and
individual
channel current programmation. A specific
shutdown mode allows the device to retain the
previously loaded configuration – operational
and current programming – in order to be
reused upon the next enabling.
The XRP7620 is designed to operate from a
single cell lithium-ion battery or fixed 3.3V or
5.0V power rails and is available in a RoHS
compliant, “green”/halogen free space saving
8-pin 2mmx3mm DFN package.
APPLICATIONS
• LCD Display & Keypad Backlighting
• Color Coded Indicator Lighting
• RGBW/RGBA Color Mixing
• Cell Phones & Handheld Devices
• Generic Current Sink I/O Expander
FEATURES
• 4-Channel LED Current Sink Driver
• Individual Channel Current Control
− Up to 31.5mA per channel / 0.5mA Steps
− 100mV Channel Dropout Voltage
• I2C Serial Interface
• 2.7V - 5.5V Input Voltage Range
• 3% Channel Current Matching
• Register Retention in Shutdown
• Shutdown Current <1µA
• Thermal and UVLO Built-in Protection
• RoHS Compliant, “Green”/Halogen
Free 2x3mm 8-Pin DFN package
TYPICAL APPLICATION DIAGRAM
Fig. 1: XRP7620 Application Diagram


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