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TPS7510X Datasheet(PDF) 1 Page - Texas Instruments |
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TPS7510X Datasheet(HTML) 1 Page - Texas Instruments |
1 / 15 page www.ti.com FEATURES DESCRIPTION APPLICATIONS V IN ENA D1A D2A D1B D2B ENB V ENA V ENB I SET V BATT TPS7510x A3 A2 A1 C3 C2 C1 B1 B3 B2 TPS7510xYFF 9-BallWCSP (TopView) TPS7510x SBVS080C – SEPTEMBER 2006 – REVISED MARCH 2007 Low Dropout, Two-Bank LED Driver with PWM Brightness Control • Regulated Output Current with 2% The TPS7510x linear low dropout (LDO) matching LED-to-LED Matching LED current source is optimized for low power keypad and navigation pad LED backlighting • Drives up to Four LEDs at 25mA Each in a applications. The device provides a constant current Common Cathode Topology to up to four unmatched LEDs organized in two • 28mV Typical Dropout Voltage Extends banks of two LEDs each in a common-cathode Usable Supply Range in Li-Ion Battery topology. Without an external resistor, the current Applications source defaults to factory-programmable, preset current level with ±0.5% accuracy (typical). An • Brightness Control Using PWM Signals optional external resistor can be used to set initial • Two 2-LED Banks with Independent Enable brightness to user-programmable values with higher and PWM Brightness Control per Bank accuracy. Brightness can be varied from off to full • No Internal Switching Signals—Eliminates EMI brightness by inputting a pulse width modulation (PWM) signal on each Enable pin. Each bank has • Default LED Current Eliminates External independent enable and brightness control, but Components current matching is done to all four channels – Default values from 3mA to 10mA (in 1mA concurrently. The input supply range is ideally suited increments) available using innovative for single-cell Li-Ion battery supplies and the factory EEPROM programming TPS7510x can provide up to 25mA per LED. – Optional external resistor can be used for No internal switching signals are used, eliminating high-accuracy, user-programmable current troublesome electromagnetic interference (EMI). The • Over-Current and Over-Temperature TPS7510x is offered in an ultra-small, 9-ball, 0.4mm Protection ball-pitch wafer chip-scale package (WCSP) and a 3mm × 3mm QFN package, yielding a very compact • Available in Wafer Chip-Scale Package total solution size ideal for mobile handsets and portable backlighting applications. The device is fully specified over TJ = –40°C to +85°C. • Keypad and Display Backlighting • White and Color LEDs • Cellular Handsets • PDAs and Smartphones Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet. All trademarks are the property of their respective owners. PRODUCTION DATA information is current as of publication date. Copyright © 2006–2007, Texas Instruments Incorporated Products conform to specifications per the terms of the Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters. |
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