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)