TLD5045EJ数据手册集成电路（IC）的LED驱动器规格书PDF

描述 Description

The TLD5045 is a highly integrated smart LED buck controller with built in protection functions. The main function of this device is to drive single or multiple series connected LEDs efficiently from a voltage source higher than the LED forward voltage by regulating a constant LED current. The constant current regulation is especially beneficial for LED color accuracy and long LED lifetime. The built in freewheeling diode and switching transistor with current sense requires less external components and saves system costs. High flexibility is achieved by placing low power resistors to adjust output currents up to 700mA and the regulator switching frequency (typ. 200kHz). An integrated PWM dimming engine provides a LED dimming function by placing a simple RC network to GND. This feature is dedicated for decentralized light modules without microcontroller involvement. In addition to that an integrated status pull down transistor can be used to simulate a minimum current flow for decentralized modules to avoid a wrong open load detection by a highside switch located in the body control module (BCM).

特性 Features

• Highly integrated BUCK DC/DC converter
• Constant Current Generation
• Wide Input Voltage Range from 5V to 40V
• Peak Current Regulation
• Very low current consumption (<2uA) in Sleep Mode
• Integrated power transistor with low saturation voltage
• Integrated fast freewheeling diode
• Integrated load current sense resistor
• Integrated status pull down transistor
• Overtemperature Protection
• Switching frequency (typ. 200kHz) ad justable via external RC network
• External PWM Dimming Input
• Integrated PWM Dimming Engine
• Analog Dimming (output current adjustable via external low power resistor and possibility to connect PTC resistor for LED protection during overtemperature conditions)
• Stable switching frequency due to fix OFF-time concept with VREC (supply voltage) feedforward
• Under- and Overvoltage shutdown with hysteresis
• Small thermally enhanced exposed heatslug SMD package
• Automotive AEC Qualified
• Green Product (RoHS) Compliant

优势:

应用 Application

• Automotive LED driven Exterior: Lighting: Brake, Tail, CHMSL, Daytime Running Light, Position Light
• Automotive LED driven Interior Lighting: Reading Light, Dome Light, Display Backlighting

简介

TLD5045EJ属于集成电路（IC）的LED驱动器。由制造生产的TLD5045EJLED 驱动器器件属于 LED 驱动器电源管理集成电路 (PMIC) 系列，可通过标称固定电压的电源为负载（通常为发光二极管）提供电流，并且电流可控。它与用于电压调节的类似产品的主要区别在于，这类器件提供较低的反馈电压（以提高系统能效），而且通常可对器件工作点进行外部控制，可在照明应用中用于实现调光功能。