Overheat protection circuit of intelligent device and intelligent device
By integrating operational amplifier units to compare reference voltages to control switching units, the PCB footprint and cost of overheat protection circuits in smart devices are reduced, achieving efficient temperature regulation and load control.
CN224537775UActive Publication Date: 2026-07-21SHENZHEN FENDA SMART HOME CO LTD
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Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHENZHEN FENDA SMART HOME CO LTD
- Filing Date
- 2025-06-13
- Publication Date
- 2026-07-21
AI Technical Summary
Technical Problem
Existing overheat protection circuits for smart devices suffer from high costs and large PCB board footprint.
Method used
The first and second integrated operational amplifier units are used to compare the voltage division value of the reference voltage by the temperature detection unit with the voltage division threshold, and output level signals to control the switching unit to realize the control of the load operation status. The two operational amplifier chips are integrated together to reduce the PCB board footprint and cost.
Benefits of technology
It improves comparison accuracy, reduces PCB board footprint and cost, and solves the shortcomings of existing overheat protection circuits.
✦ Generated by Eureka AI based on patent content.
Smart Images
Figure CN224537775U_ABST
Abstract
The utility model discloses an overheat protection circuit and intelligent equipment of intelligent equipment, and the circuit includes reference voltage unit, first integrated operational amplifier unit, second integrated operational amplifier unit, temperature detection unit, output protection unit, switch unit, temperature detection unit is electric connection with first integrated operational amplifier unit, second integrated operational amplifier unit respectively, and reference voltage unit is electric connection with temperature detection unit, first integrated operational amplifier unit, second integrated operational amplifier unit respectively, the output of first integrated operational amplifier unit, second integrated operational amplifier unit is electric connection with output protection unit, and the output of output protection unit is electric connection with switch unit, through adopting first integrated operational amplifier unit, second integrated operational amplifier unit compares the voltage division value of temperature detection unit to reference voltage with voltage division threshold value respectively, and then controls the load operating state, improves the comparison accuracy, and reduces the occupation and cost to PCB board.
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