描述 Description

The AL5802LP combines a high gain NPN transistor with a pre-biased

NPN transistor to make a simple small footprint LED driver. The LED

current is set by an external resistor connected from REXT pin (2) to

GND pin (3), and the internal high gain transistor develops approximately

0.6V across the external resistor. The AL5802LP open-collector output

can operate from 0.8V to 30V enabling it to operate from 5V to 24V

power supplies without additional components. PWM dimming of the

LED current can be achieved by either driving the BIAS pin (6) with a low

impedance voltage source, or drivingthe EN pin (4) with an external open-
collector NPN transistor or open-drain N-channel MOSFET. The

AL5802LP is available in a U-DFN1616 Type F package and is ideal for

driving 10mA to 120mA LED currents.

特性 Features

Reference Voltage VRSET = 0.65V

-40 to +125°C Temperature Range

0.8V to 30V Open-Collector Output

Negative Temperature Co-Efficient – Automatically Reduces the LED Current at High Temperatures

Low Thermal Impedance, Small Footprint DFN1616 Package with
Exposed Pads

Totally Lead-Free & Fully RoHS Compliant

Halogen and Antimony Free. “Green” Device

應用 Application

LED signage, general illumination, emergency lighting