TPS92641PWPRTI TI德州仪器 LED照明驱动器

TPS92641PWPR 1 Features 3 Description

The TPS92640 and TPS92641 devices are high1•

VIN Range from 7 V to 85 V

voltage, synchronous NFET controllers for buck•

– 20000:1 Shunt FET PWM Dimming constant switching frequency. The TPS92640 and

TPS92641PWPR • Adjustable LED Current Sense Voltage TPS92641 devices include a high-voltage start-up

TPS92641PWPR • 2-Ω, 1-Apeak MOSFET Gate Drivers regulator that operates over a wide input range of 7 V

to 85 V. The PWM controller is designed for high • Shunt Dimming MOSFET Gate Driver (TPS92641) speed capability, including an oscillator frequency

TPS92641PWPR • Programmable Switching Frequency range up to 1 MHz. The deadtime between high side

• Precision Voltage Reference 3 V ±2% and low side gate driver is optimized to provide very

• Input UVLO and Output OVP high efficiency over a wide input operating voltage

and output power range. The TPS92640 and

• Low Power Shutdown Mode and Thermal TPS92641 devices accept both analog and PWM Shutdown input signals, resulting in exceptional dimming control

range. Linear response characteristics between input

2 Applications command and LED current is achieved with true zero

LED current using low off-set error amplifier and • LED Driver / Constant Current Regulator

proprietary PWM dimming logic. Both devices also

• Architectural LED Lighting Drivers include precision reference capable of supplying

• Automotive LED Drivers current to low power microcontroller. Protection

• General LED features include cycle-by-cycle current protection, Illumination

overvoltage protection, and thermal shutdown. The

TPS92641 device includes a shunt FET dimming

input and MOSFET driver for high resolution PWM

dimming.

1特征3描述

TPS92640和TPS92641设备是high1•

VIN从7伏到85伏不等

电压，buck•这种控制方法简化了

维修时的环路补偿设计

- 20000:1分流场效应晶体管PWM调光恒定开关频率。TPS92640和

•可调LED电流感应电压TPS92641装置包含高压启动

•2-Ω,1-Apeak MOSFET栅极驱动调节器操作的输入范围宽7 V

85 V。PWM控制器是为高并联调光MOSFET门驱动器(TPS92641)速度能力设计的，包括振荡器频率

•可编程开关频率范围可达1 MHz。在高点之间的时间

•精密基准电压3 V±2%,侧浇口驱动程序优化提供非常低

•在宽输入工作电压下，输入UVLO和输出OVP高效

输出功率范围。TPS92640和

•低功耗关机模式和热TPS92641设备同时接受模拟和PWM关机输入信号，导致异常调光控制

的范围内。输入之间的线性响应特性

2应用程序命令和LED电流用真零实现

使用低偏置误差放大器和LED驱动/恒流调节器的LED电流

专有的PWM调光逻辑。两个设备也

•建筑LED照明驱动包括能够提供的精确参考

•汽车LED驱动器电流低功率单片机。保护

•一般的LED功能包括循环电流保护、照明

过压保护和热停机。的

TPS92641装置包括一个分流场效应晶体管调光

输入和MOSFET驱动高分辨率PWM

变暗。