XRP7620EVB【PDF 1/4 页】EVAL BOARD FOR XRP7620

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X R P 7 6 2 0

4 - C h a n n e l A d j u s t a b l e C u r r e n t I 2 C C o n t r o l l e d L E D D r i v e r

June 2009

GENERAL DESCRIPTION

The XRP7620EVB Evaluation Board is designed

to demonstrate and evaluate the performance

of the XRP7620 device, a multi purpose 4-

channel independently adjustable current sink

driver.

Optimized for LED backlighting and

RGBW/RGBA color mixing applications, the

XRP7620 supports an industry standard 2-line

I 2 C serial interface providing full independent

control of each channel up to a current of

31.5mA in steps of 500μA.

The XRP7620 operates from 2.7V to 5.5V input

with 100mV dropout voltage and allows a wide

range of forward voltage LEDs.

The evaluation board is a completely

assembled and tested surface mount board

which provides easy probe access points so

that the user can quickly connect LEDs and

measure electrical characteristics. The

Evaluation Board schematic diagram is shown

in Figure 1.

Rev. 1.0.0

E V A L U A T I O N B O A R D M A N U A L

FEATURES

? 4-Channel LED Current Sink Driver

? Individual Channel Current Control

? Up to 31.5mA per channel / 500μA Steps

? 100mV Channel Dropout Voltage

? I 2 C Serial Interface

? 2.7V - 5.5V Input Voltage Range

? 3% Channel Current Matching

? Configuration Retention in Shutdown

? Shutdown Current <1μA

? Thermal and UVLO Built-in Protection

? 2x3mm 8-Pin DFN package

EVALUATION BOARD SCHEMATICS

Fig. 1: XRP7620 Evaluation Board Schematics

Exar Corporation

48720 Kato Road, Fremont CA 94538, USA

www.exar.com

Tel. +1 510 668-7000 – Fax. +1 510 668-7001

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