ZHCSHI4D January 2018 – December 2019 TPS25221
PRODUCTION DATA.
- 1 特性
- 2 應用
- 3 說明
- 4 修訂歷史記錄
- 5 Device Comparison Table
- 6 Pin Configuration and Functions
- 7 Specifications
- 8 Parameter Measurement Information
- 9 Detailed Description
- 10Application and Implementation
- 11Power Supply Recommendations
- 12Layout
- 13器件和文檔支持
- 14機械、封裝和可訂購信息
封裝選項
機械數(shù)據(jù) (封裝 | 引腳)
散熱焊盤機械數(shù)據(jù) (封裝 | 引腳)
- DRV|6
訂購信息
10.2.2 Auto-Retry Functionality
Some applications require that an over-current condition disables the part momentarily during a fault condition and re-enables after a pre-set time. This auto-retry functionality can be implemented with an external resistor and capacitor. During a fault condition, FAULT pulls low disabling the part. The part is disabled when EN is pulled low, and FAULT goes high impedance allowing CRETRY to begin charging. The part re-enables when the voltage on EN reaches the turn-on threshold, and the auto-retry time is determined by the resistor-capacitor time constant. The device continues to cycle in this manner until the fault condition is removed.
Figure 27. Auto-Retry Functionality Some applications require auto-retry functionality and the ability to enable or disable with an external logic signal. Figure 28 shows how an external logic signal can drive EN through RFAULT and maintain auto-retry functionality. The resistor-capacitor time constant determines the auto-retry time-out period.
Figure 28. Auto-Retry Functionality With External EN Signal