High-side switch control circuit based on PTC heater
By using a high-side switch control circuit based on a PTC heater, combined with a comparator circuit and a high-side switch circuit, the problems of high cost and unsuitability for low-voltage, high-current environments in existing technologies are solved, enabling safe and reliable operation and extended lifespan of the heater in vehicle environments.
CN224385703UActive Publication Date: 2026-06-19SHENZHEN SHARING ELECTRONICS
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Patent Information
- Application Number
- CN202521070979.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-05-27
- Publication Date
- 2026-06-19
- Estimated Expiration
- 2035-05-27
AI Technical Summary
Technical Problem
Existing auxiliary heating control circuits for automotive cockpits are costly, bulky, and unsuitable for low-voltage, high-current environments, thus failing to meet the needs of onboard heaters.
Method used
A high-side switch control circuit based on a PTC heater is adopted, including a comparator circuit and a high-side switch circuit. The comparator and high-side switch chip realize precise control of the heating process and multiple protection functions, reduce software dependence, and use capacitor filtering to reduce interference.
Benefits of technology
It achieves safe and reliable operation in low-voltage, high-current environments, reduces costs, improves stability and service life, and is suitable for complex vehicle environments.
✦ Generated by Eureka AI based on patent content.
Abstract
The utility model provides a high-side switch control circuit based on a PTC heater. The high-side switch control circuit comprises a comparison circuit and a high-side switch circuit. The comparison circuit comprises a first resistor, a second resistor, a third resistor, a third capacitor and a comparator, one end of the first resistor is electrically connected with one end of the second resistor and the normal phase input end of the comparator, and the other end of the second resistor is grounded; one end of the third resistor is electrically connected with one end of the third capacitor and the inverted input end of the comparator; the output end of the comparator is electrically connected with the input end of the high-side switching circuit. According to the circuit provided by the embodiment of the invention, through cooperative work of the comparison circuit and the high-side switching circuit, accurate control and multiple protection functions of the heating process are realized, software control is not needed, and thus the use cost is reduced. The comparison circuit accurately judges the heating signal and outputs a control signal; the device has the advantages of simple structure, high reliability, good stability, long service life and the like.
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