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 100mV across it. At the same time, output peak current limit is working during normal operation.
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 20mA(RMS) OVP(output Over‐Voltage Protection) Output FB short protection Temperature shut down(OTP).
Adjustable Output Cable Resistance Compensation
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> 50mA
