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TD1741 40Vin 2 Outputs Buck Controller

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

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