描述 Description

The TLD5085EJ is a smart LED buck converter with an integrated power-switch, capable of driving up to 1.8A load current with excellent line and load regulation. The main function of this device is to step-down the input voltage and regulating a constant LED current. The constant current regulation is especially beneficial for LED color accuracy and longer lifetime. The TLD5085EJ also has a PWM input which can be used for LED dimming. The switching frequency of 370kHz allows to use small and inexpensive passive components. An Enable function is implemented to reduce the shut-down current consumption to typ. 0.1μA. This IC is suited for use in the harsh automotive environments and provides protection functions such as current limitation and overtemperature shutdown. The integrated soft-start feature avoids a current and voltage over shot at the output during start-up of the device.

特性 Features

·Wide Input Voltage Range from 4.75V to 45V
·Constant Current or Constant Voltage Regulation
·Drives LEDs in Buck Topology
·Very low shutdown current consumption (typ. 0.1μA)
·370 kHz switching frequency
·PWM Dimming
·Integrated power-switch (output current up to 1.8A)
·Internal Soft-Start function
·± 2% output current tolerance (± 4% for full load current range)
·Small thermally enhanced exposed heatslug package
·Over Temperature Shutdown
·AEC Qualified
·Green Product (RoHS Compliant)

應用 Application

·Automotive Lighting (Reading Light, Dome Light, Dashboard Backlighting)
·High Power LED Applications
·Constant Current and Voltage Source

簡介

TLD5085EJ屬于集成電路（IC）的LED驅動器。由制造生產(chǎn)的TLD5085EJLED 驅動器器件屬于 LED 驅動器電源管理集成電路 (PMIC) 系列，可通過標稱固定電壓的電源為負載（通常為發(fā)光二極管）提供電流，并且電流可控。它與用于電壓調節(jié)的類似產(chǎn)品的主要區(qū)別在于，這類器件提供較低的反饋電壓（以提高系統(tǒng)能效），而且通?？蓪ζ骷ぷ鼽c進行外部控制，可在照明應用中用于實現(xiàn)調光功能。