TITL494CNSR
Overview
The TL494CNSR is a versatile pulse-width-modulation (PWM) control circuit designed for power-supply control across various topologies including buck, boost, and push-pull. It integrates all the functions required for a complete PWM control circuit, including an on-chip 5-V reference regulator, two error amplifiers, and an adjustable dead-time control comparator. The device features uncommitted output transistors capable of sourcing or sinking up to 200mA, allowing for flexible configuration in single-ended or push-pull output modes.
Why Choose This Part
The architecture includes internal circuitry that prohibits double pulses at either output, ensuring high reliability in switching power stages. Its variable dead-time control allows engineers to prevent simultaneous conduction in bridge configurations, while the wide 7V to 40V input range accommodates diverse industrial and consumer power sources.
Applications
Key Specifications
Getting Started
To begin development, set the oscillation frequency using an external resistor and capacitor on pins 5 and 6, and configure the output control pin (pin 13) for either parallel or push-pull operation. Prototyping is typically done on custom PCBs or breadboards using the 16-pin SO package, ensuring proper heat sinking if sourcing the full 200mA from the output transistors.
TL494 Family
Comparing specs that differ across variants. The current part is highlighted.
