Texas Instruments TL494
The TL494 device incorporates all the functions required in the construction of a pulse-widthmodulation (PWM) control circuit on a single chip. Designed primarily for power-supply control, this device offers the flexibility to tailor the power-supply control circuitry to a specific application. 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 5V, 5%-precision regulator, and output-control circuits.| Part No. | TL494 |
|---|---|
| Datasheet | TL494 Download |
| Manufacturer |  Texas Instruments |
| Description | Pulse-Width-Modulation Controller |
| Buy | Stock & Price |
FEATURES
● Complete PWM power-control circuitry● Uncommitted outputs for 200mA sink or source current
● Output control selects single-ended or push-pull operation
● Internal circuitry prohibits double pulse at either output
● Variable dead time provides control over total range
● Internal regulator provides a stable 5V reference supply with 5% tolerance
● Circuit architecture allows easy synchronization 2
APPLICATIONS
● Desktop PCs● Microwave ovens
● Power supplies: AC/DC, isolated, with or without PFC
● Server PSUs
● Solar micro-inverters
● Washing machines: low-end and high-end
● E-bikes
● Power: telecom/server AC/DC supplies: dual controller: analog
● Smoke detectors
● Solar power inverters 3
DESCRIPTION
The error amplifiers exhibit a common-mode voltage range from –0.3V to VCC – 2V. The dead-time control comparator has a fixed offset that provides approximately 5% dead time. The on-chip oscillator can be bypassed by terminating RT to the reference output and providing a sawtooth input to CT, or it can drive the common circuits in synchronous multiple-rail power supplies.
