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LM3646 Datasheet(PDF) 3 Page - Texas Instruments |
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LM3646 Datasheet(HTML) 3 Page - Texas Instruments |
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3 / 40 page  Top View A B C D E Bottom View E D C B A 1 2 3 4 1 2 3 4 LM3646 www.ti.com SNVS962A – DECEMBER 2013 – REVISED NOVEMBER 2014 5 Pin Configuration and Functions DSBGA Package 20 Pins Pin Functions PIN TYPE DESCRIPTION NUMBER COUNT NAME A1, B1 2 GND - Ground. A2, B2 2 SW O Drain Connection for Internal NMOS and Synchronous PMOS Switches. A3, B3, C3 3 OUT O Step-Up DC/DC Converter Output. Connect a 10-µF ceramic capacitor between this pin and GND. A4,B4 2 LED1 O High-Side Current Source Output for Flash LED. Both bumps must be connected for proper operation. C1 1 AGND - Analog Ground. C2 1 TORCH I Active High Hardware Torch Enable. Drive TORCH high to turn on Torch/Movie Mode. Used for External PWM mode. Has an internal pull-down resistor of 200 k Ω between TORCH and GND. C4, D4 2 LED2 O High-Side Current Source Output for Flash LED. Both bumps must be connected for proper operation. D1 1 IN I Input Voltage Connection. Connect IN to the input supply, and bypass to GND with a 10-µF or larger ceramic capacitor. D2 1 SCL I Serial Clock Input. D3 1 ENABLE I Active High Enable Pin. High = Standby, Low = Shutdown/Reset. Has an internal pull-down resistor of 200 k Ω between ENABLE and GND. E1 1 TEMP O Threshold Detector for LED Temperature Sensing and Current Scale Back. E2 1 SDA I/O Serial Data Input/Output. E3 1 STROBE I Active High Hardware Flash Enable. Drive STROBE high to turn on Flash LEDs. STROBE overrides TORCH. Has an internal pull-down resistor of 200 k Ω between STROBE and GND. E4 1 TX I Configurable Dual Polarity Power Amplifier Synchronization Input. Has an internal pull-down resistor of 200 k Ω between TX and GND. Copyright © 2013–2014, Texas Instruments Incorporated Submit Documentation Feedback 3 Product Folder Links: LM3646 |
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