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LM3646 Folha de dados(PDF) 2 Page - Texas Instruments |
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LM3646 Folha de dados(HTML) 2 Page - Texas Instruments |
2 / 31 page Top View A B C D E Bottom View E D C B A 1 2 3 4 1 2 3 4 LM3646 SNVS962 – DECEMBER 2013 www.ti.com Connection Diagram Figure 1. 20-Bump 2.010 mm x 1.610 mm x 0.6mm DSBGA Package YFQ20AAA PIN DESCRIPTIONS Pin # Pin Name Description Count A1, B1 2 GND Ground. A2, B2 2 SW Drain Connection for Internal NMOS and Synchronous PMOS Switches. A3, B3, C3 3 OUT Step-Up DC/DC Converter Output. Connect a 10 µF ceramic capacitor between this pin and GND. A4,B4 2 LED1 High-Side Current Source Output for Flash LED. Both bumps must be connected for proper operation. C4, D4 2 LED2 High-Side Current Source Output for Flash LED. Both bumps must be connected for proper operation. C1 1 AGND Analog Ground. D1 1 IN Input Voltage Connection. Connect IN to the input supply, and bypass to GND with a 10 µF or larger ceramic capacitor. E2 1 SDA Serial Data Input/Output. D2 1 SCL Serial Clock Input. D3 1 ENABLE Active High Enable Pin. High = Standby, Low = Shutdown/Reset. Has an internal pull-down resistor of 200 k Ω between ENABLE and GND. E3 1 STROBE 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. C2 1 TORCH 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. E4 1 TX Configurable Dual Polarity Power Amplifier Synchronization Input. Has an internal pull-down resistor of 200 k Ω between TX and GND. E1 1 TEMP Threshold Detector for LED Temperature Sensing and Current Scale Back. Table 1. Application Circuit Component List Component Manufacturer Value Part-Number Size (mm) Current/Voltage Rating(Resistance) L TOKO 1 µH 1286AS-H-1R0N 2.0 mm x 1.6 mm x 1.2 mm ISAT = 3.1A (68 mΩ) COUT1,2 Murata 10 µF GRM188R60J106M 1.6 mm x 0.8 mm x 0.8 mm(0603) 6.3V CIN1,2 Murata 10 µF GRM188R60J106M 1.6 mm x 0.8 mm x 0.8 mm(0603) 6.3V 2 Submit Documentation Feedback Copyright © 2013, Texas Instruments Incorporated Product Folder Links: LM3646 |
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