IS32LT3174中文资料A single channel linear programmable LED driver features an ON/OFF input pin to toggle the channel between the OFF condition and the source condition数据手册Lumissil规格书

描述 Description

The IS32LT3174 is a linear programmable current regulator consisting of one output channel capable of up to 200mA. It features an ON/OFF input pin to toggle the channel between the OFF condition and the source condition.

A single external resistor programs the current level for the channel, while a separate, single resistor programs the fade in and fade out rate for channel.

The device integrates a 63 steps fade in and fade out algorithm (Gamma correction) which causes the output LED current to gradually ramp up to the full source value after the channel’s control pin is pulsed. The same controller causes the LED current to gradually ramp down to zero if the channel’s input control pin is pulsed while the output channel is on. The LED current output can be controlled by a momentary contact switch or logic level signal.

The IS32LT3174 is targeted at the automotive market with end applications to include map and dome lighting as well as exterior accent lighting. For 12V automotive applications the low dropout driver can support 1 to 3 LEDs per channel. It is offered in a small thermally enhanced SOP-8-EP package.

特性 Features

• Output current can source up to 200mA
• On/off control for channel ▪Input is debounced
• Programmable current via a single external resistor
• Programmable fade in, fade out via external resistor ▪ Pull down resistor value sets fade speed ▪ Gamma corrected fade in/out algorithm
• Fault Protection: ▪ LED string shorted to GND ▪ ISET pin short to GND ▪ Over temperature
• SOP-8-EP package
• Automotive Grade - AEC-Q100
• Operating temperature range from -40°C ~ +125°C

应用 Application

• Automotive Interior: ▪ Map light ▪ Dome lighting ▪ Puddle lamp in doors ▪ Glove box ▪ Vanity mirror

简介

IS32LT3174属于集成电路（IC）的LED驱动器。由制造生产的IS32LT3174LED 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。