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LM3556 Datasheet(PDF) 2 Page - Texas Instruments |
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LM3556 Datasheet(HTML) 2 Page - Texas Instruments |
2 / 31 page Top View A1 A2 B1 B2 B3 Top View A3 C2 C1 C3 D2 D3 A4 B4 C4 D4 D1 Pin 1A LM3556 SNVS796C – AUGUST 2011 – REVISED APRIL 2013 www.ti.com This integrated circuit can be damaged by ESD. Texas Instruments recommends that all integrated circuits be handled with appropriate precautions. Failure to observe proper handling and installation procedures can cause damage. ESD damage can range from subtle performance degradation to complete device failure. Precision integrated circuits may be more susceptible to damage because very small parametric changes could cause the device not to meet its published specifications. CONNECTION DIAGRAM Figure 1. 16-Bump DSBGA Package YFQ16ACA PIN DESCRIPTIONS Pin Name Description High-Side Current Source Output for Flash LED. Both bumps must be connected for proper A1, B1 LED operation. Step-Up DC/DC Converter Output. Connect a 10 µF ceramic capacitor between this pin and B2, A2 OUT GND. B3, A3 SW Drain Connection for Internal NMOS and Synchronous PMOS Switches. A4, B4 GND Ground C1 TEMP Threshold Detector for LED Temperature Sensing and Current Scale Back. Active High Hardware Torch Enable. Drive TORCH high to turn on Torch/Movie Mode. Used C2 TORCH for External PWM mode. Has an internal pulldown resistor of 300 k Ω between TORCH and GND. Active High Hardware Flash Enable. Drive STROBE high to turn on Flash pulse. STROBE C3 STROBE overrides TORCH. Has an internal pulldown resistor of 300 k Ω between STROBE and GND. Input Voltage Connection. Connect IN to the input supply, and bypass to GND with a 10 µF or C4 IN larger ceramic capacitor. Configurable Dual Polarity Power Amplifier Synchronization Input. Has an internal pulldown D1 TX resistor of 300 k Ω between TX and GND. D2 SDA Serial Data Input/Output. D3 SCL Serial Clock Input. Active High Enable Pin. High = Standby, Low = Shutdown/Reset. There is no internal D4 ENABLE pulldown resistor on this pin. 2 Submit Documentation Feedback Copyright © 2011–2013, Texas Instruments Incorporated Product Folder Links: LM3556 |
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