TS1451 Datasheet, PDF (1/7 Pages) Taiwan Semiconductor Company, Ltd – Dual Channel PWM Controller

SOP-16
DIP-16
TS1451
Dual Channel PWM Controller
Supply Voltage Range 3.6 V to 40V
Output Driving Current 20mA
Oscillator Frequency up to 500KHz
General Description
The TS1451 integrates dual channel PWM control circuit into a single chip, mainly designs for power supply regulator.
All the functions included an on-chip 2.5V reference output, two error amplifiers, and adjustable oscillator, two
dead-time comparators, under voltage lock out, short circuit protection, and dual common-emitter output transistor
circuit.
Recommend the output CE transistors as pre-driver for driving extremely. the dead time control can provide from 0% to
100%. Switching frequency can be adjustable by trimming RT and CT. During low Vcc situation, the under voltage lock
out makes sure that the output are off until the internal circuit is operational normally.
The TS1451 is offered in SOP-16 and DIP-16 package.
Features
Pin Assignments
— Dual PWM Power Control Circuitry
— Operating Voltage Can be up to 50V
— Adjustable Dead Time Control (DTC)
— Under Voltage Lock Out protection (UVLO)
— Short Circuit Protection (SCP)
— Variable Oscillator Frequency up to 500KHz
— 2.5V Voltage Reference Output
Applications
— Backlight Inverter
— DC to DC Converters in Computers
Ordering Information
Part No.
TS1451CD
TS1451CS
Operating Temp. Package
0 ~ +70 ^oC
DIP-16
SOP-16
Pin Descriptions
Name
CT
RT
EA+
EA-
FB
DTC
Out
Gnd
Vcc
SCP
Ref
Descriptions
Timing Capacitor
Timing Resistor
Error Amplifier Input (+)
Error Amplifier Input (-)
Feedback Loop Compensation
Dead Time Control
Pre-Driver Output
Ground
Supply Voltage
Short Circuit Protection
Voltage Reference
TS1451
1-7
2003/12 rev. A