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XRP7620IH-F Datasheet(PDF) 1 Page - Exar Corporation |
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XRP7620IH-F Datasheet(HTML) 1 Page - Exar Corporation |
1 / 11 page X XR RP P7 76 62 20 0 4 4--C Ch ha an nn ne ell A Ad djju us stta ab blle e C Cu urrrre en ntt II2 2C C C Co on nttrro olllle ed d L LE ED D D Drriiv ve err 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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