[ f_osc = \frac1R_T \cdot C_T ]
Two built-in transistors that can handle up to 200mA, allowing the chip to drive MOSFETs directly or through a driver stage. Versatile Applications
To design a reliable circuit around the TL494, it is vital to understand what happens inside the silicon. The IC integrates several foundational functional blocks:
If you are working on a custom power supply project, would you like to explore adding using the second error amplifier, or do you need assistance calculating the component values for a different switching frequency ? Share public link tl494 circuit diagram
Keep the timing component traces ( RTcap R sub cap T CTcap C sub cap T
Increase a lower voltage to a higher one (e.g., 12V to 24V).
TL494 Pulse-Width-Modulation Control Circuits datasheet (Rev. I) [ f_osc = \frac1R_T \cdot C_T ] Two
The frequency of the internal oscillator is set using an external resistor ( RTcap R sub cap T ) and capacitor ( CTcap C sub cap T
This block provides an adjustable, non-overlapping dead time to prevent simultaneous conduction in push-pull output topologies.
The is a versatile fixed-frequency Pulse Width Modulation (PWM) controller that has served as the backbone of switch-mode power supplies (SMPS) for decades. Its circuit architecture is designed to handle every stage of power regulation—from frequency generation to error correction—on a single chip. Core Functional Blocks Share public link Keep the timing component traces
Tied directly to the 5V REF (Pin 14) . This enables the internal flip-flop, alternating outputs between Pin 9/8 and Pin 10/11.
Generally connected to ground for maximum duty cycle, but can be used to set a maximum duty cycle constraint. Common TL494 Applications The TL494 is incredibly versatile, often used in: DC-to-DC Converters: Buck, Boost, and Flyback topologies. Switch Mode Power Supplies (SMPS). Battery Chargers. Motor Speed Control. TL494 Equivalents