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XRP7618 Datasheet(PDF) 1 Page - Exar Corporation |
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XRP7618 Datasheet(HTML) 1 Page - Exar Corporation |
1 / 7 page X XR RP P7 76 61 18 8 8 8--C Ch ha an nn ne ell C Co on ns stta an ntt C Cu urrrre en ntt L Liin ne ea arr L LE ED D D Drriiv ve err W Wiitth h S Sm ma arrtt T Ta allk kTTM M August 2011 Rev. 2.2.0 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 XRP7618 is an 8-channel, high voltage, constant-current sink LED driver capable of sinking up to 100mA current per channel. With outputs rated at 30V, the XRP7618 can control strings of multiple LEDs with better than ±1.5% channel to channel current matching. LED channel current is programmed via an external resistor within a 10mA to 100mA range. Dimming is supported up to 25kHz or through an analog signal. Featuring Exar’s Smart TalkTM technology, when combined with a boost converter, XRP7618 maximizes the overall system efficiency by dynamically reporting the minimum LED voltage necessary to maintain current regulation mode. STANDARD CONFIGURATION The XRP7618EVB evaluation board is configured to operate under the following conditions and parameters: Input voltage range VCC: .............................. 4.2V – 5.5V Input voltage range VLED:....................................... <30V Number of LED strings: .....................................16 (2x8) LED current per string: 3 selectable pre-set levels ............. 20mA-60mA-100mA Adj. Level .......................................... 10mA to 100mA E EV VA ALLU UA AT TIIO ON N B BO OA AR RD D M MA AN NU UA ALL FEATURES 8 Constant-Current Channels Adjustable up to 100mA per Channel Channel Paralleling for higher Current ±1.5% Current Matching Accuracy Up to 30V LED Channel Voltage Range 5V Biasing Voltage and Control Smart TalkTM Power Optimization Parallel Operations Support PWM and Analog Dimming UVLO, Open LED & Over Temperature protection 20-pin TSSOP (EP) Package EVALUATION BOARD SCHEMATICS Fig. 1: XRP7618 Evaluation Board Schematics |
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Similar Description - XRP7618 |
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