ZHCSI48B September 2017 – June 2018 TPS560430
UNLESS OTHERWISE NOTED, this document contains PRODUCTION DATA.
- 1 特性
- 2 应用
- 3 说明
- 4 修订历史记录
- 5 Device Comparison Table
- 6 Pin Configuration and Functions
- 7 Specifications
- 8 Detailed Description
- 9 Application and Implementation
- 10Power Supply Recommendations
- 11Layout
- 12器件和文档支持
- 13机械、封装和可订购信息
8.3.3 Enable
The voltage on the EN pin controls the ON or OFF operation of TPS560430. A voltage of less than 0.95 V shuts down the device, while a voltage of more than 1.36 V is required to start the regulator. The EN pin is an input and cannot be left open or floating. The simplest way to enable the operation of the TPS560430 is to connect the EN to VIN. This allows self-start-up of the TPS560430 when VIN is within the operating range.
Many applications will benefit from the employment of an enable divider RENT and RENB (Figure 15) to establish a precision system UVLO level for the converter. System UVLO can be used for supplies operating from utility power as well as battery power. It can be used for sequencing, ensuring reliable operation, or supply protection, such as a battery discharge level. An external logic signal can also be used to drive EN input for system sequencing and protection. Kindly note that, the EN pin voltage should never be higher than VIN + 0.3 V. It is not recommended to apply EN voltage when VIN is 0 V.
Figure 15. System UVLO by Enable Divider