8-Channel LED Driver

The ISL97636 is an integrated power LED driver that controls 8 channels of LED current for LCD backlight applications. The ISL97636 is capable of driving typically 72 (8x9) pieces of 3.5V/30mA or 80 (8x10) pieces of 3.2V/20mA LEDs. The ISL97636’s contains 8 channels of voltage controlled current sources with typical currents matching of ±1, which compensate for the non-uniformity effect of forward voltages variance in the LED stacks. To minimize the voltage headroom and power loss in the typical multi-strings operation, the ISL97636 features a dynamic headroom control that monitors the highest LED forward voltage string and uses its feedback signal for output regulation.

Features

? 8 Channels

? 6V to 24V Input

? 34.5V Output Max

? Drive Maximally 72 (3.5V/30mA each) or 80 (3.2V/20mA each) LEDs

? Current Matching ±1 Typ

? Dynamic Headroom Control

? PWM Signal up to 20kHz Dimming

? Protections

- String Open Circuit Detection

- String Short Circuit Detection with Selectable Thresholds

- Over-Temperature Protection

- Overvoltage Protection

- Optional Input Overcurrent Protection w/Disconnect SW

? 1.2MHz Switching Frequency

? 24 Ld 4mmx4mm QFN Package

? Pb-Free (RoHS compliant)

Applications

? Notebook Displays LED Backlighting

? LCD Monitor LED Backlighting

? Automotive Displays LED Backlighting

? Automotive or Traffic Lighting

ISL97636屬于集成電路（IC） > LED 驅(qū)動器。瑞薩科技有限公司制造生產(chǎn)的ISL97636LED 驅(qū)動器器件屬于 LED 驅(qū)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(diào)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(diào)光功能。