Power Good signal control circuit of dual-output power supply and electronic equipment

Abstract

The invention discloses a dual output power supply Power Good signal control circuit and an electronic device, and belongs to the field of power supply control, the dual output power supply Power Good signal control circuit comprises a first input end connected with a first power supply of the dual output power supply, a second input end connected with a second power supply of the dual output power supply, and a third input end connected with a second power supply of the dual output power supply; the second input end is connected with a second path of power supply of the double-path output power supply; the P.G signal generation circuit is used for generating a P.G signal according to the states of the first path of power supply and the second path of power supply, and the level state of the P.G signal indicates whether the P.G signal is a normal signal or not; and the output end is used for outputting the P.G signal to a power supply monitoring system. According to the invention, the power supply module can be identified by monitoring the P.G signal; therefore, timely maintenance is facilitated, it is ensured that the two-way backup power supply module has a backup function forever, and the situation that a display screen cannot display in an important display scene due to power supply faults is avoided.

Description

technical field [0001] The invention belongs to the field of power supply control, and more specifically relates to a dual-channel output power supply Power Good signal control circuit and electronic equipment. Background technique [0002] The Power Good signal is referred to as P.G or P.OK signal. When the switching power supply is started, if the input voltage is within the rated range and the DC output voltage of each channel reaches the allowable value, then after a certain time delay, the P.G circuit will send out a "power normal" signal (P.OK is high level). When the power input is abnormal or the output voltage is abnormal, the power supply will send out a "power failure" signal (P.OK is low level). If the P.G signal cannot be detected on the computer or server, it will cause failure to boot. Monitoring or related control can be done by detecting the P.G signal. [0003] The traditional P.G signal detection is applied in the PC industry. At the same time, the det...

AI Technical Summary

Problems solved by technology

[0003] The traditional P.G signal detection is applied in the PC industry. At the same time, the detection method is to detect the input and detect the 5VSB signal; the existing technology is only suitable for the application in the field of PC. The output is abnormal, and the P.G fault signal cannot be output

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