![Dd Form 626 Requires Drivers To Provide Dd Form 626 Requires Drivers To Provide](http://mailergreat.weebly.com/uploads/1/2/3/9/123958194/281428925.jpg)
One potential issue with this circuit is that there is only one isolated input channel, and it relies on the high voltage driver to have the needed matching in the timing between channels, and it also relies on the deadtime needed for the applications. The typical approach to implementing the isolated half-bridge gate drive function is to use an optocoupler for isolation, followed by a high voltage gate driver IC, as shown in Figure 1.
![Dd Form 626 Requires Drivers To Provide Dd Form 626 Requires Drivers To Provide](http://heavyslot.weebly.com/uploads/1/2/3/9/123967224/720554673.png)
This reduces the deadtime from one switch of the half bridge turning off before the second switch turns on. The high-and low-side drivers need very close matching of the timing characteristics to allow accurate and efficient switching. The isolated half-bridge driver’s function is to drive the gates of high- and low-side N-channel MOSFETs (or IGBTs) with a low output impedance to reduce the conduction losses, and a fast switching time to reduce the switching losses.
![Dd Form 626 Requires Drivers To Provide Dd Form 626 Requires Drivers To Provide](https://energytank.weebly.com/uploads/1/2/3/9/123922316/649974370.jpg)
These design concepts will be discussed in detail as this article explores the ability of isolated half-bridge gate driver solutions to provide high performance and a small solution size. Isolated half-bridge gate drivers are used in many applications that range from isolated dc-to-dc power supply modules where high power density and efficiency are required, to solar inverters where high isolation voltage and long-term reliability are critical. Design Fundamentals of Implementing an Isolated Half-Bridge Gate Driver