TI 公司的TPS61165时能管理多个高亮度LED的升压DC/DC转换器，集成了40V, 1.2A的电流开关，工作在1.2MHz固定开关频率，输入电压3伏到18伏，输出电压可高达38伏，可支持多达3个大功率LED。

TI BOOST CONVERTER MANAGES MULTIPLE HIGH-BRIGHTNESS LEDS
DC/DC Converter with Integrated 40-V, 1.2-A Current Switch Supports Up to Three High-Power LEDs
With a 40-V rated integrated switch FET, the TPS61165 is a boost converter that drives up to 10 LEDs in series. The boost converter runs at a 1.2-MHz fixed switching frequency with 1.2-A switch current limit, and allows for the use of a high brightness LED in general lighting.

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 using the 1 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 TPS61165 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 TPS61165 to prevent the output from exceeding the absolute maximum ratings during open LED conditions.