TL494 SMD PWM Controller IC for Switching Power Supplies
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Prices updated: 12 Oct 2026
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About this product
The TL494 is a fixed-frequency pulse-width modulation (PWM) control circuit used to build switching DC-DC converters, inverters and switch-mode power supplies. This SMD version suits compact boards, and the chip includes an oscillator, two error amplifiers and two output transistors.
Specifications
- Function
- PWM control circuit
- Supply voltage
- 7 V to 40 V
- Output current
- 200 mA per output
- Oscillator frequency
- Up to 300 kHz
- Pins
- 16
- Package
- SMD (typically SOIC-16)
Frequently asked questions
What supply voltage can power the TL494?
The TL494 datasheet specifies a supply range of 7 V to 40 V. Confirm the exact figures in the datasheet for your variant before finalizing a design.
How do I set the switching frequency?
The frequency is set by an external resistor on the RT pin and capacitor on the CT pin, following the formula in the datasheet. Choose values that give your target frequency.
