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SP6682 Datasheet(PDF) 1 Page - Exar Corporation |
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SP6682 Datasheet(HTML) 1 Page - Exar Corporation |
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1 / 13 page  S SP P6 66 68 82 2 H Hiig gh h E Effffiic ciie en nc cy y W Wh hiitte e L LE ED D C Ch ha arrg ge e P Pu um mp p R Re eg gu ulla atto orr February 2009 Rev. 2.0.0 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 SP6682 is a current regulated charge pump ideal for converting a Li-Ion battery input for driving white LEDs used in backlighting color displays or cell phone camera flash applications. The charge pump automatically switches between x1.5 and x2 modes based on the program-mable VMODE voltage, providing improved efficiency over traditional methods using charge pump doubler followed by LDO. This input voltage threshold can be externally programmed by a resistor divider network for optimized efficiency at specific output voltages and currents. The SP6682 operates with an internal 600kHz clock, which reduces switching noise and improves VOUT ripple. Output current or voltage can be accurately regulated by modulating the switcher between the charge pump and output capacitor. In shutdown mode, the IC disconnects the output from the input and draws less than 1.5μA current. The SP6682 is offered in a 10-pin MSOP package, and a small 10-Pin DFN Package. APPLICATIONS • Mobile Phones & PDAs • 3.3V to 5V Conversion • Palmtop Computers • Color LCD Modules FEATURES • 200mA Output Current • Low Profile Inductorless Regulator − 600KHz Oscillator − x1.5 and x2 Conversion Modes • 2.7V to 5.5V Input Voltage Range • Fast Turn-on Time 175µs • 1mA Quiescent Current • Adjustable Output Current and Voltage • PWM Dimming Control • True Shutdown Disconnect • Soft Start • 10-pin MSOP and 10-pin DFN Packages TYPICAL APPLICATION DIAGRAM Fig. 1: SP6682 LCD Backlighting Application Diagram |
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Similar Description - SP6682 |
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