Qualified for Automotive Applications
Complete PWM Power Control Circuitry
Completely Synchronized Operation
Internal Undervoltage Lockout Protection
Wide Supply Voltage Range
Internal Short-Circuit Protection
Oscillator Frequency . . . 500 kHz Max
Variable Dead Time Provides Control Over
Total Range
Internal Regulator Provides a Stable 2.5-V
Reference Supply
Available in Q-Temp Automotive
HighRel Automotive Applications
Configuration Control / Print Support
Qualification to Automotive Standards

description
The TL1451A 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 TL1451A
contains an on-chip 2.5-V regulator, two error amplifiers, an adjustable oscillator, two dead-time comparators,
undervoltage lockout circuitry, and dual common-emitter output transistor circuits.
The uncommitted output transistors provide common-emitter output capability for each controller. The internal
amplifiers exhibit a common-mode voltage range from 1.04 V to 1.45 V. The dead-time control (DTC)
comparator has no offset unless externally altered and can provide 0% to 100% dead time. The on-chip
oscillator can be operated by terminating RT and CT. During low VCC conditions, the undervoltage lockout
control circuit feature locks the outputs off until the internal circuitry is operational.
The TL1451A is characterized for operation from −40°C to 125°C.