UTCTL1451 Datasheet, PDF (1/5 Pages) Unisonic Technologies – DUAL PULSE-WIDTH-MODULATION CONTROL CIRCUITS

UTCTL1451 LINEAR INTEGRATED CIRCUIT
DUAL PULSE-WIDTH-MODULATION
CONTROL CIRCUITS
DESCRIPTION
The UTC TL1451 incorporates on a single monolithic chip
all the functions required in the construction of two pulse-
width-modulation (PWM) control circuits. Designed primarily
for power supply control, the TL1451 contains an on-chip 2.5V
regulator, two error amplifiers, an adjustable oscillator, two
dead-time comparators, undervoltage lockout circuitry, and
dual common –emitter output transistor circuits.
SOP-16
FEATURES
*Complete PWM Power control Circuitry
*Completely Synchronized Operation
*Internal Undervoltage Lockout Protection
*Wide Supply Voltage Range
*Internal Short-Circuit Protection
*Oscillator Frequency …500kHz Max
*Variable Dead Time Provides Control Over Total Range
*Internal Regulator Provides a Stable 2.5V Reference Supply
PIN CONFIGURATIONS
DIP-16
CT ₁
RT ²
ERROR _{1 IN+ 3}
AMPLIFIER
1
1 IN- ₄
1 FEEDBACK ⁵
1 DTC 6
1 OUT 7
GND ⁸
16 REF
15 ^SCP
14 2 IN+
13 2 IN-
ERROR
AMPLIFIER
2
12 _{2 FEEDBACK}
11 2 DTC
10 2 OUT
9
Vcc
UTC UNISONIC TECHNOLOGIES CO., LTD. 1
QW-R103-011,A