Texas Instruments TL1454A Dual-Channel Pulse-Width-Modulation (PWM) Control Circuit TL1454ACPW

The TL1454ACPW is a dual-channel pulse-width modulation (PWM) control circuit designed for low-power DC/DC converters. It operates within a supply voltage range of 3.6 V to 20 V and features an oscillator frequency adjustable from 50 kHz to 2 MHz. Each channel includes its own error amplifier, PWM comparator, dead-time control comparator, and MOSFET driver, allowing for versatile applications in devices such as LCD displays and notebook computers. The device supports direct driving of n-channel MOSFETs for step-up or flyback converters on one channel, while the second channel is configured for p-channel MOSFETs in step-down or inverting converters. The adjustable dead-time control ranges from 0% to 100% duty cycle, and a soft start feature can be implemented with an external capacitor. The TL1454ACPW also includes a common voltage reference, oscillator, undervoltage lockout, and short-circuit protection for enhanced reliability in various applications.