Logic power supply switch control circuit
A technology for power supply switches and control circuits, applied in electronic switches, electrical components, pulse technology, etc., can solve problems such as limiting the selection of ICs in complex power systems, and achieve the effect of expanding the selection of ICs and improving power supply compatibility.
Pending Publication Date: 2020-07-28
XIAMEN PRIMA TECH
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Problems solved by technology
The existing selection method limits the scope of IC selection for engineers when designing complex power supply systems.
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[0020] In order to make the object, technical solution and advantages of the present invention clearer, the embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings.
[0021] see figure 1 As shown, a logic power supply switch control circuit of the present invention includes: a first MOS transistor Q1, a second MOS transistor Q2, a third transistor Q3, a fourth transistor Q4, a fifth transistor Q5, a sixth Transistor Q6 and optocoupler U1; said optocoupler U1 is made up of a light emitting diode and a phototransistor; the base of said sixth triode Q6 is connected with switch control signal STB; said sixth triode Q6 The collector of the light-emitting diode is connected with the cathode of the light-emitting diode, and the anode of the light-emitting diode is connected with the first DC voltage VCCS; the collector of the phototransistor is connected with the second DC voltage Vaux, and the emission of the photo...
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The invention discloses a logic power supply switch control circuit which comprises a first MOS transistor, a second MOS transistor, a third triode, a fourth triode, a fifth triode, a sixth triode andan optical coupler. The sixth triode receives the switch control signal and controls a light emitting diode of the optical coupler; the fifth triode is connected with the phototriode of the optical coupler to control the output of a first output voltage, a second output voltage and a third output voltage; the first MOS transistor is used for receiving a first output voltage and controlling the output of a fifth output voltage through the third triode; and the second MOS transistor is used for receiving the second output voltage and controlling the output of the fourth output voltage through the fourth triode. According to the logic power supply switch control circuit, the IC selection range of engineers during complex power supply system design is expanded, the situation that IC power supply similarities and differences are large and can only be discarded is broken through, and the power supply compatibility of ICs of various manufacturers is effectively improved.
Description
technical field [0001] The invention relates to the technical field of power supply control, in particular to a logic power supply switch control circuit. Background technique [0002] With the multi-functionalization of electronic products, the multi-module circuit work must be compatible with synchronous control to meet the multi-functional requirements of the complete machine product. Therefore, under one control signal, it is necessary to be able to synchronously control the power supply switch control circuit of the module circuits with large differences in power supply, so as to realize the problem of power supply compatibility control between modules. At present, there are more and more power supply modules in many power supply products, such as PFC modules, LLC modules, flyback modules, BUCK modules and so on. While these module power supplies can work synchronously, they also need to meet the standby requirements at the same time. Therefore, many engineers generall...
Claims
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IPC IPC(8): H03K17/94
CPCH03K17/94
Inventor 郭荣辉李亮劲吴海清薛元
Owner XIAMEN PRIMA TECH