General Description
EC1489 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.
EC1489 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: 3V to 28V; 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
