Power direction

TL494 was designed by Texas Instruments in the early 1980s And launched, it was widely accepted by the market immediately after its launch, especially on the ATX half-bridge power supply of [PC](https://baike.baidu.com/item/PC%E6%9C%BA). To this day, a considerable proportion of PC power supplies are still based on the TL494 chip. Over the years, as the cheapest double-ended PWM chip, TL494 has been used in double-ended topologies such as [push-pull](https://baike.baidu.com/item/%E6%8E%A8%E6%8C%BD) and There are many applications in half bridges. Due to its lower [operating frequency](https://baike.baidu.com/item/%E5%B7%A5%E4%BD%9C%E9%A2%91%E7%8E%87) and single-ended Output port characteristics, it often cooperates with power [bipolar transistor](https://baike.baidu.com/item/%E5%8F%8C%E6%9E%81%E6%80%A7%E6%99% B6%E4%BD%93%E7%AE%A1) (BJT) is used. If used with power MOSFET, an external circuit is required.