ZHCSJ97B September 2009 – January 2019 TPS60151
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
8.4.3 Over-current Protection and Short-Circuit Protection
The TPS60151 has internal short circuit protection to protect the IC when the output is over loaded or shorted to ground. Figure 8 illustrates the protection circuit. IP is directly related to IOUT and the maximum IP is clamped by IR3*k*n. The TPS60151 ensures a current limit of 500 mA or less which is mandated by the HDMI electrical specification. To further avoid damage when output is shorted to ground, the short circuit protection circuitry senses the output voltage and adjusts Vbias down to clamp the maximum output current to a lower value –80 mA (typical).
Figure 8. Current Limit 
Figure 9. Maximum Output Current Capability and Short Circuit Protection