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TPS61161DRVR

製品説明
仕様・特性

TPS61160A TPS61161A SLVS937A – MARCH 2009 – REVISED JULY 2011 www.ti.com White LED Driver With PWM Brightness Control in 2mm x 2mm QFN Package Check for Samples: TPS61160A, TPS61161A FEATURES 1 • • • • • • • DESCRIPTION 2.7V to 18V Input Voltage Range 26V Open LED Protection for TPS61160A 38V Open LED Protection for TPS61161A 200mV Reference Voltage With ±2% Accuracy PWM Interface for Brightness Control Built-in Soft Start Up to 90% Efficiency 2mm × 2mm × 0.8mm 6-pin QFN Package With Thermal Pad With a 40-V rated integrated switch FET, the TPS61160A/61A is a boost converter that drives LEDs in series. The boost converter runs at 600kHz fixed switching frequency to reduce output ripple, improve conversion efficiency, and allows for the use of small external components. The default white LED current is set with the external sensor resistor Rset, and the feedback voltage is regulated to 200mV, as shown in the typical application. During the operation, the LED current can be controlled by a pulse width modulation (PWM) signal applied to the CTRL pin through which the duty cycle determines the feedback reference voltage. In PWM dimming mode, the TPS61160A/61A does not burst the LED current; therefore, it does not generate audible noises on the output capacitor. For maximum protection, the device features integrated open LED protection that disables the TPS61160A/61A to prevent the output from exceeding the absolute maximum ratings during open LED conditions. APPLICATIONS • • • • • Cellular Phones Portable Media Players Ultra Mobile Devices GPS Receivers White LED Backlighting for Media Form Factor Display The TPS61160A/61A is available in a space-saving, 2mm × 2mm QFN package with thermal pad. L1 22 mH VI 3 V to 18 V C1 1 mF TPS61161A VIN ON/OFF DIMMING CONTROL 38V MAX C2 1 mF SW CTRL D1 FB COMP GND C3 220 nF L1: TDK VLCF5020T-220MR75-1 C1: Murata GRM188R61E105K C2: Murata GRM21BR71H105K D1: ONsemi MBR0540T1 Rset 10 W 20 mA Figure 1. Typical Application of TPS61161A 1 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. PRODUCTION DATA information is current as of publication date. Products conform to specifications per the terms of the Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters. Copyright © 2009–2011, Texas Instruments Incorporated

ブランド

TI

会社名

Texas Instruments Incorporated

本社国名

U.S.A

事業概要

世界25ヶ国以上に製造・販売拠点を有する国際的な半導体企業であり、デジタル情報家電、ワイヤレス、ブロードバンド市場に欠かせないデジタル信号処理を行うDSPと、それに関連するアナログIC、マイクロコントローラを主力製品としている。

供給状況

 
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