TD1741 is a Synchronous Buck Controller with two current sense pins suitable for many multi‐output applications. It is designed to allow for operating a wide supply voltage range from 6V to 40V. It has both high‐side and low‐side drivers allowing synchronous configuration using two external power‐NMOS。 This IC can operate in both Constant Current (CC) and Constant Voltage (CV) modes. TD1741 operates as a Buck Controller providing a wide range of outputs at Constant Voltage (CV) from 6V to 40V 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 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: 6V to 40V, UVLO=5.5V+0.5V
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
Duty: 0~98% (Toff_min=100ns, Dead‐time=25~35ns)
Switching Frequency: 125k+25k
Integrated MOSFET Drivers
QFN12L Package
Applications
Car Charger
High‐Brightness Lighting
General‐Purpose DC/DC Controller
