TPS61161 - 采用 2mm x 2mm QFN 封装的具有数字和 PWM 亮度控制的白光 LED 驱动器

TPS61161是TI德州仪器公司的一款背光产品，TPS61161是采用 2mm x 2mm QFN 封装的具有数字和 PWM 亮度控制的白光 LED 驱动器，本站介绍了TPS61161的封装应用图解、特点和优点、功能等，并给出了与TPS61161相关的TI元器件型号供参考。

TPS61161 - 采用 2mm x 2mm QFN 封装的具有数字和 PWM 亮度控制的白光 LED 驱动器 - 背光 - LED驱动器 - 德州仪器

产品特性

2.7-V to 18-V Input Voltage Range
26-V Open LED Protection (TPS61160)
38-V Open LED Protection (TPS61161)
200-mV Reference Voltage With ±2% Accuracy
Flexible Digital and PWM Brightness Control
Built-in Soft Start
Up to 90% Efficiency

产品应用

Cellular Phones
Portable Media Players
Ultra Mobile Devices
GPS Receivers
White LED Backlighting for Media Form Factor Display

产品说明

With a 40-V rated integrated switch FET, the TPS61160 and TPS61161 are boost converters that drive LEDs in series. The boost converters run at 600-kHz fixed switching frequency to reduce output ripple, improve conversion efficiency, and allow 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 200 mV, as shown in the Typical Application. During the operation, the LED current can be controlled using the one-wire digital interface (EasyScale™ protocol) through the CTRL pin. Alternatively, a pulse width modulation (PWM) signal can be applied to the CTRL pin through which the duty cycle determines the feedback reference voltage. In either digital or PWM mode, the TPS61160 and TPS61161 do not burst the LED current; therefore, they do not generate audible noises on the output capacitor. For maximum protection, the device features integrated open LED protection that disable the TPS61160 and/or TPS61161 to prevent the output voltage from exceeding the device's absolute maximum voltage ratings during open LED conditions.

The TPS61160 and TPS61161 are available in a space-saving, 2-mm × 2-mm SON package with thermal pad.

产品器件信息

PART NUMBER	PACKAGE	OPEN LED PROTECTION
TPS61160	SON (6)	TPS61160 use 26 V (typical)
TPS61161	SON (6)	TPS61161 use 38 V (typical)

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