Output stage circuit and reversed polarity protection circuit for high-side switch chip

• Main Authors: SUN WEIFENG, DONG QIANHENG, REN JINTAO, YANG SONGTAO, ZHENG YIFEI, SHI LONGXING
• Format: Patent
• Language: Chinese; English
• Published: 26.07.2024
• Subjects: BASIC ELECTRONIC CIRCUITRY; ELECTRICITY; PULSE TECHNIQUE

The invention provides an output stage circuit and a reversed polarity protection circuit for a high-side switch chip, and the output stage circuit comprises a main power tube, a drive circuit, a first clamping protection circuit, and a reversed polarity protection circuit. The reversed polarity protection circuit comprises a first reversed polarity protection circuit which is connected between a power supply end and a grounding end and is used for detecting power supply voltage between the power supply end and the grounding end and generating a control signal according to the power supply voltage; and the second reversed polarity protection circuit is respectively connected with the power supply end, the grounding end and the chip output end and is used for detecting the power supply voltage between the power supply end and the grounding end and providing a low-resistance path between the power supply end and the chip output end according to the power supply voltage. When the power supply voltage between the