TD1742 Datasheet | Techcode

Description TD1742‐2COT is a DC/DC Buck Controller with 2 current sense pins suitable for many multi‐output applications. It is designed to allow for operating a wide supply voltage range from 7.5V to 40V. It has both high‐side and low‐side drivers allowing synchronous configuration using two external power‐NMOS. It can operate in both Constant Current (CC) and Constant Voltage (CV) modes. TD1742‐2COT operates as a DC/DC Buck Controller providing a wide range of outputs at Constant Voltage (CV) from 1.20V to 28V and the output current as high as 10A or above. It has a Constant Current(CC) mode so that output current can be set externally and at a accuracy of +/‐7%. The current mode control that makes feedback control have good line and load regulation with flexible external design. There are 2 independent current limit control pins in addition to the CC setting for added flexibility of driving 2 separate loads. Each of the current limits can be set by a sense resistor at 100m V across it. At the same time, output peak current limit is working during normal operation. Pin Configurations Features - Vin: 7.5V to 40V - Vout: 3V to 28V; typical at 5V - CC/CV Mode Control - Burst/PFM Mode for Increased Light Load Efficiency - Hiccup mode 1‐2S when SCP/OVP occur - Protection NMOS peak current limit: accuracy：~20% Output short protection: reduce input current to less than 20m A(RMS) OVP(output Over‐Voltage Protection) Output FB short protection Temperature shut down(OTP). - Adjustable Output Cable Resistance pensation - Duty: 0~98%(Toff_min=100ns, Deadtime=25~35ns) - Switching Frequency: 150KHz(+/‐25k) - Integrated MOSFET Driver. - OVP: When Vfb>140%- VREF, open discharge switch ( Vout1/2). Discharge current> 50m A - QFN‐16 Package Applications - Car Charger - High‐Brightness Lighting - General‐Purpose DC/DC Controller Figure1 Pin Configuration of TD1742(Top View) December, 12, 2018. Techcode Semiconductor Limited 1 .techcodesemi. Techcode® 40Vin 2 Outputs COT Buck...