The invention relates to an output self-starting circuit for a high-voltage backup power supply and an automobile. The output self-starting circuit comprises a high-voltage backup power supply switching circuit and a starting circuit. Wherein the high-voltage backup power supply switch circuit comprises a PMOS (P-channel Metal Oxide Semiconductor) tube Q1, a source electrode of the PMOS tube Q1 is connected with an input 15VBACK of the high-voltage backup power supply, a drain electrode of the PMOS tube Q1 is connected with an output + 15V of the high-voltage backup power supply, and a grid electrode of the PMOS tube Q1 is connected with the starting circuit. The starting circuit comprises a first starting circuit and a second starting circuit, and the first starting circuit and the second starting circuit are respectively connected with the high-voltage backup power switch circuit; the first starting circuit is used for controlling on and off of the PMOS transistor Q1 through the single-chip microcomputer. And the second starting circuit is used for automatically starting the output of the high-voltage backup power supply when the 12V input voltage VBAT + is under-voltage. According to the invention, when the input of the external 12V low-voltage power supply is powered down, the high-voltage backup power supply can be automatically turned on and quickly output, so that the system is prevented from being powered down, and a function safety state can be entered.
本发明涉及一种用于高压备份电源的输出自启动电路及汽车,包括高压备份电源开关电路和启动电路。其中,高压备份电源开关电路包括PMOS管Q1,PMOS管Q1的源极与高压备份电源的输入15V_BACK连接,PMOS管Q1的漏极与高压备份电源的输出+15V连接,PMOS管Q1的栅极与启动电路连接。启动电路包括第一启动电路和第二启动电路,第一启动电路和第二启动电路分别与高压备份电源开关电路连接;第一启动电路用于通过单片机控制PMOS管Q1的开通与关断;第二启动电路用于在12V输入电压VBAT+欠压时自动启动高压备份电源输出。本发明解决电机控制在外部12V低压电源输入掉电时,高压备份电源能够自开启、快速输出,以防止系统掉电,并能够进入功能安全状态。
Output self-starting circuit for high-voltage backup power supply and automobile
一种用于高压备份电源的输出自启动电路及汽车
2024-11-05
Patent
Electronic Resource
Chinese
IPC: | H02J CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER , Schaltungsanordnungen oder Systeme für die Abgabe oder Verteilung elektrischer Leistung / B60R Fahrzeuge, Fahrzeugausstattung oder Fahrzeugteile, soweit nicht anderweitig vorgesehen , VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR / G01R Messen elektrischer Größen , MEASURING ELECTRIC VARIABLES / H02H EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS , Schutzschaltungsanordnungen / H02M APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS , Anlagen zur Umformung von Wechselstrom in Wechselstrom, von Wechselstrom in Gleichstrom oder umgekehrt, oder von Gleichstrom in Gleichstrom und zur Verwendung in Netzen oder ähnlichen Stromversorgungssystemen |
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