ZHCSNA2 October 2021 TPS563212
PRODUCTION DATA
- 1 特性
- 2 應(yīng)用
- 3 說明
- 4 Revision History
- 5 Pin Configuration and Functions
- 6 Specifications
-
7 Detailed Description
- 7.1 Overview
- 7.2 Functional Block Diagram
- 7.3
Feature Description
- 7.3.1 Advanced Emulated Current Mode Control
- 7.3.2 Mode Selection and PG/SS Pin Function Configuration
- 7.3.3 Power Good (PG)
- 7.3.4 Soft Start and Pre-Biased Soft Start
- 7.3.5 Output Discharge Through PG/SS Pin
- 7.3.6 Precise Enable and Adjusting Undervoltage Lockout
- 7.3.7 Overcurrent Limit and Undervoltage Protection
- 7.3.8 Overvoltage Protection
- 7.3.9 Thermal Shutdown
- 7.4 Device Functional Modes
- 8 Application and Implementation
- 9 Power Supply Recommendations
- 10Layout
- 11Device and Documentation Support
- 12Mechanical, Packaging, and Orderable Information
封裝選項(xiàng)
機(jī)械數(shù)據(jù) (封裝 | 引腳)
- DRL|8
散熱焊盤機(jī)械數(shù)據(jù) (封裝 | 引腳)
訂購信息
7.3.5 Output Discharge Through PG/SS Pin
If the PG function is selected, the device pulls the PG/SS pin low when the device is shut down by one of the following:
- EN
- OVP
- UVP
- UVLO
- Thermal shutdown
In those cases, the user can connect PG/SS to VOUT through a resistor to discharge VOUT (see Figure 7-2). The discharge rate can be adjusted by R3, which is also used to pull up the PG/SS pin in normal operation. The minimum supply voltage required for the discharge function to remain active is typically 2.5 V. For reliability, keep the maximum current into the PG/SS pin less than 1.8 mA. Given an output voltage, the minimum resistance of R3 can be calculated in Equation 11.
