SLUS829G August 2008 – February 2020 UCC2897A
PRODUCTION DATA.
- 1 Features
- 2 Applications
- 3 Description
- 4 Revision History
- 5 Device Options
- 6 Pin Configuration and Functions
- 7 Specifications
-
8 Detailed Description
- 8.1 Overview
- 8.2 Functional Block Diagram
- 8.3 Feature Description
- 8.4 Device Functional Modes
- 9 Application and Implementation
- 10Power Supply Recommendations
- 11Layout
- 12Device and Documentation Support
- 13Mechanical, Packaging, and Orderable Information
封裝選項
機械數據 (封裝 | 引腳)
散熱焊盤機械數據 (封裝 | 引腳)
- RGP|20
訂購信息
8.3.4 Line Overvoltage Protection
When the line-overvoltage protection is triggered in the UCC2897A controller, the gate-drive signals are immediately disabled. At the same time, the slow discharge of CSS initiates. While the soft-start capacitor discharges the gate-drive signals remain disabled. Once VSS = 0.5 V and the overvoltage disappears from the input of the power supply, operation resumes through a regular soft start of the converter as it is demonstrated in Figure 21. The pulses of OUT and AUX stop if one of three conditions is met:
- VDD reaches UVLO off
- VSS reaches below 2.5 V
- FB voltage is below 2.5 V
Figure 21. Line Overvoltage Sequence, P-Channel