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How is the tl494 a PWM control circuit?
The TL494 is a fixed-frequencypulse-width-modulation(PWM) control circuit. Modulation of output pulses is accomplished by comparing the sawtooth waveform created by the internal oscillator on the timing capacitor (CT) to either of two control signals.
What kind of IC is a tl494?
TL494 is a PWM controller IC used for power electronics circuits. It comprises of on-chip two error amplifiers an oscillator with adjustable frequency feature, an output flip-flop having pulse steering control, and an output control circuit with feedback.
Is the tl494 a push pull or single ended output?
The TL494 device provides for push-pull or single-ended output operation, which can be selected through the output-control function. The architecture of this device prohibits the possibility of either output being pulsed twice during push-pull operation. The TL494C device is characterized for operation from 0°C to 70°C.
When was Texas Instruments tl494 power supply made?
TL494 was designed and launched by Texas Instruments in the early 1980s. It was widely accepted by the market immediately after it was launched, especially on the ATX half-bridge power supply of PCs. Until today, a considerable proportion of PC power supplies are still based on the TL494 chip. NO.
What kind of oscillator does the tl494 have?
The TL494 device contains two error amplifiers, an on-chip adjustable oscillator, a dead-time control (DTC) comparator, a pulse-steering control flip-flop, a 5-V, 5%-precision regulator, and output-control circuits. The error amplifiers exhibit a common-mode voltage range from –0.3 V to VCC – 2 V.
Can a PWM controller control a power switch?
So if you are looking for an IC to produce PWM signals for controlling a power switch based on the current flowing through the circuit, then this IC might be the right choice for you. A test circuit from the TL494 datasheet is shown below.