MEL7136ASPG

General Description

The MEL7136A is a constant current regulator for driving LEDs with low quiescent current and low dropout voltage.

The current is adjustable from 10mA to1A with an external resistor. The MEL7136B is only a controller, and must

be connected to an external NMOS. MEL7136B is an external transistor, is suitable for applications requiring a high

output current. The output current of ME7136B can be adjusted by external DC control voltage or PWM control.

Only one external resistor is required to achieve a constant current LED driver. Soft start, thermal protection and

low voltage protection are also provided. The driver pin EXT is provided for current and voltage extension. Adding

an external NMOS or NPN transistor to this pin can extend current and voltage range.

Features

l MEL7136B is only a controller, and must be connected to an external NMOS.

lThe output current of ME7136B is adjustable

l Sink current:10mA to1A adjustable with an external resistor

l Current and voltage range extendable by adding an external NMOS or NPN transistor

l Power supply voltage: MEL7136A/B：2.7~18V MEL7136C：2~18V

l Low drop out voltage: 50mV@1A

l Low quiescent current: 80uA

l Thermal Shutdown protection:165℃

l Soft start

l Low voltage protection: MEL7136A/B：2.4V MEL7136C：1.7V

Typical Application

l Power Led driver and controller

Package

l MEL7136A: 5-pin SOT89-5 8-pin ESOP8

l MEL7136B: 5-pin SOT23-5

l MEL7136C: 5-pin SOT89-5