General Description

TD1489 is a Synchronous Buck Circuit with two current sense

pins suitable for many multi-output applications. It is

designed to allow for operating a wide supply voltage range

from 4.7V to 40V.This IC can operate in both Constant

Current (CC) and Constant Voltage (CV) modes.

TD1489 operates as a Buck Circuit providing a wide range of

outputs at Constant Voltage (CV) from 4.7V to 40V and the

output current as high as 6A or above. It has a Constant

Current (CC) mode so that output current can be set

externally and at an accuracy of ±4%.

The current mode control and external compensation makes

feedback control have good line and load regulation with

flexible external design.

Features

 Vin: 4.7V to 40V

 Vout: 1.2V to Vin*97%V; typical at 5V

 Precision CC/CV Mode Control

 Burst/PFM Mode for Increased Light Load

Efficiency

 2 outputs independent Constant Current setting

 Hiccup mode when output voltage below 50%

normal output voltage

 Protection:

NMOS peak current limit: accuracy：~20%

Output short protection: reduce input current to

less than 20mA (RMS)

Output FB OVP (125% VFB), only turn off High side

MOS.

Temperature shutdown (OTP)

 Adjustable Output Cable Resistance Compensation

 Switching Frequency: 125k+25k

 Integrated Power MOSFET

 QFN32L Package

Applications

 Car Charger

 High-Brightness Lighting

 General-Purpose DC/DC Application