TPS92641 - 用于精确调光 LED 驱动器的 TPS92640 TPS92641 同步降压控制

TPS92641是TI德州仪器公司的一款LED照明-照明产品，TPS92641是用于精确调光 LED 驱动器的 TPS92640 TPS92641 同步降压控制，本站介绍了TPS92641的封装应用图解、特点和优点、功能等，并给出了与TPS92641相关的TI元器件型号供参考。

TPS92641 - 用于精确调光 LED 驱动器的 TPS92640 TPS92641 同步降压控制 - LED照明-照明 - LED驱动器 - 德州仪器

产品特性

VIN Range from 7 V to 85 V
Wide Dimming Range
- 500:1 Analog Dimming
- 2500:1 Standard PWM Dimming
- 20000:1 Shunt FET PWM Dimming
Adjustable LED Current Sense Voltage
2-Ω, 1-Apeak MOSFET Gate Drivers
Shunt Dimming MOSFET Gate Driver (TPS92641)
Programmable Switching Frequency
Precision Voltage Reference 3 V ±2%
Input UVLO and Output OVP
Low Power Shutdown Mode and Thermal Shutdown

产品应用

LED Driver / Constant Current Regulator
Architectural LED Lighting Drivers
Automotive LED Drivers
General LED Illumination

产品说明

The TPS92640 and TPS92641 devices are high-voltage, synchronous NFET controllers for buck-current regulators. Output current regulation is based on valley current-mode operation using a controlled on-time architecture. This control method eases the design of loop compensation while maintaining nearly constant switching frequency. The TPS92640 and TPS92641 devices include a high-voltage start-up regulator that operates over a wide input range of 7 V to 85 V. The PWM controller is designed for high speed capability, including an oscillator frequency range up to 1 MHz. The deadtime between high side and low side gate driver is optimized to provide very high efficiency over a wide input operating voltage and output power range. The TPS92640 and TPS92641 devices accept both analog and PWM input signals, resulting in exceptional dimming control range. Linear response characteristics between input command and LED current is achieved with true zero LED current using low off-set error amplifier and proprietary PWM dimming logic. Both devices also include precision reference capable of supplying current to low power microcontroller. Protection features include cycle-by-cycle current protection, overvoltage protection, and thermal shutdown. The TPS92641 device includes a shunt FET dimming input and MOSFET driver for high resolution PWM dimming.

产品器件信息

PART NUMBER	PACKAGE	BODY SIZE (NOM)
TPS92640	HTSSOP (14)	4.40 mm × 5.00 mm
TPS92641	HTSSOP (16)	4.40 mm × 5.00 mm

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