UCC21520DW Bootstrap Power Supply for High-Side Gate Drivers原理

Other Parts Discussed in Thread: UCC21520

http://www.ti.com.cn/cn/lit/ug/tidubx1b/tidubx1b.pdf  的4.3.6,4.3.6.1,4.3.6.2,4.3.6.3部分是否有一个详细原理图和介绍?