Product Introduction

Product parameters

Funtion：Multi-function High Brightness LED Driver IC

Opration Mode：Linear

Vout Range：0V-5.5V

Vin Range：2.85V - 6V

Max Output Current：1.5A

Operating Current：310uA

Solar Panel charge：No

Chip Temperature Regulation：Yes

Package：eSOP8

Dimming：Yes

Chip Enable：Yes

On-chip Power MOSFET：Yes

General Description

The CN5728 is a current regulation integrated circuit operating from an input voltage of 2.85V to 6V, the constant output current can be set up to 1.5A with an external resistor. The CN5728 is ideal to be used to drive LED. The on-chip power transistor and current sense block greatly reduce the external component count.

The chip also integrates the mode selection circuit, oscillator and state registers, which can control the LED to operate in one of the following four modes: Off, High Brightness(HB), Low Brightness(LB), Flashing and off.

The CN5728 adopts the temperature regulation instead of temperature protection function, the temperature regulation can make the LED being turned on continuously in case of high ambient temperature or high voltage drop.

The other features include the chip enable and button de-bounce functions.

CN5728 is available in thermally-enhanced 8-pin small outline package (SOP8).

Applications

l Flashlight

l High-brightness LED driver

l LED headlights

l Emergency lights and lighting

Features

l Operating Voltage Range: 2.85V to 6V

l Four Operating Modes:
HB, LB, Flash and Off

l On-chip Power Transistor

l Low dropout voltage: 0.4V @ 1.5A