Functional Description

The TLE4309 is an integrated adjustable constant current source for driving loads up to 500 mA. The output current level can be adjusted with an external shunt resistor. Supplying high power LEDs with the TLE4309 ensures constant brightness independent from supply voltage or LED forward voltage spread. Therefore, LED lifetime is extended by protecting from overcurrent and overtemperature

Features

• Adjustable constant current up to 500 mA

• Operating supply voltage range 4.5 V to 24 V

• Maximum supply voltage up to 45 V

• Low dropout voltage

• PWM / ENABLE input

• << 1 µA quiescent current when disabled

• Overtemperature protection

• Short circuit proof

• Reverse polarity protection

• Operating junction temperature range: -40 °C to 150 °C

• Suitable for applications up to 85 °C ambient temperature.

• Green Product (RoHS compliant)

TLE4309G属于集成电路（IC） > LED 驱动器。英飞凌科技公司制造生产的TLE4309GLED 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。