General Description
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.
Pin Configurations
Figure1 Pin Configuration of TD1741(Top View)
Features
⚫ Vin: 6V to 40V, UVLO=5.5V+0.5V
⚫ Vout: 1.2V to Vin*98%; 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
