General Description
TD8655 is a DC/DC Buck Synchronous with four current limit
pins suitable for many multi‐output applications. It is
designed to allow for operating a wide supply voltage range
from 9V 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.
TD8655 operates as a DC‐DC Buck Controller providing a wide
range of outputs at Constant Current (CV) from 1.2V 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 and external compensation makes
feedback control have good line and load regulation with
flexible external design.
There are four independent current limit control pins for four
separate loads. Each of the current limit can be set by a
resistor(RCS) at 108mV across it. Of course, output peak
current limit is working during normal operation
Pin Configurations
Figure1 Pin Configuration of TD8655(Top View)
Features
Vin: 8.5V to 40V
Vout: 1.2V to 28V; typical at 5V
CC/CV Mode Control
PFM Mode for Increased Light Load Efficiency
4 outputs current precision OCP: Adjustable
Current‐Limit Protection
Burst mode when OCP/SCP occur
Protection
NMOS peak current limit: accuracy：~30%
Output short protection: reduce input current to
less than 20mA(RMS)
Temperature shut down(OTP)
Adjustable Output Cable Resistance Compensation
Duty: 0~95%
Switching Frequency: 100kHz to 300KHz
Integrated MOSFET Drivers
QFN20 Package
Applications
Car Charger
High‐Brightness Lighting
General‐Purpose DC/DC Controller
