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Power supply with wide input voltage

A technology of power supply and wide input, which is applied in the direction of adjusting electrical variables, control/regulation systems, instruments, etc., and can solve problems such as delay in response to transients, slow charging speed, and small voltage fluctuation range

Inactive Publication Date: 2020-03-27
STATE GRID SHANDONG ELECTRIC POWER +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The LDO circuit voltage range in the current power supply is narrow, and the voltage fluctuation range is small, resulting in slow charging speed and delay in responding to the transient state. The existing technology can no longer meet the needs of people at the present stage. make changes

Method used

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  • Power supply with wide input voltage
  • Power supply with wide input voltage
  • Power supply with wide input voltage

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Embodiment Construction

[0032] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. All other embodiments obtained by persons of ordinary skill in the art based on the present invention without making creative efforts fall within the protection scope of the present invention.

[0033] refer to figure 1 , the reference source circuit is composed of a start-up circuit, a reference core circuit and a pre-regulation circuit;

[0034] The starting circuit includes a field effect transistor M11, a field effect transistor M12, a field effect transistor M10, a field effect transistor M9, a field effect transistor M8, a field effect transistor M7 and a charging capacitor C1, and the drain of the field effect transistor M11 is connected to the field effect tran...

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Abstract

The invention discloses a power supply with wide input voltage. The power supply comprises a reference source circuit. The circuit is composed of a starting circuit, a reference core circuit and a pre-adjusting circuit. The reference core circuit comprises a cascade circuit, a parallel effect transistor circuit, a voltage division circuit and a negative feedback circuit. The negative feedback circuit comprises a field effect transistor M6, a resistor R1, a resistor R2, a resistor R3, a filter capacitor C2, a triode T6, a triode T7 and a triode T3. The pre-voltage-stabilizing circuit of a negative feedback structure enables the input voltage range to be wider and enables the input voltage range to bear larger input voltage fluctuation, and the reference source circuit with the pre-adjustingcircuit not only can provide a stable reference electric foot, but also has power supply noise suppression performance higher than that of a traditional reference. The stability and transient response speed of the low dropout linear voltage stabilizing circuit are improved, and the low dropout linear voltage stabilizing circuit can stably work within a wide temperature range without large capacitance.

Description

technical field [0001] The invention relates to the technical field of power supply, in particular to a power supply with wide input voltage. Background technique [0002] The power supply circuit generally supplies power to the digital circuit module and the analog circuit module at the same time. Among them, the signal amplitude in the digital circuit module varies in a large range and the speed is fast, which will generate a lot of noise and cause interference to the analog circuit module. The low voltage used in the power supply circuit The main reason why the differential linear voltage regulator circuit can achieve these characteristics is that the internal regulator uses a trench field effect transistor instead of a PNP transistor in the usual linear voltage regulator. The trench field effect transistor does not need base current drive, so it is greatly reduces the supply current of the device itself. [0003] The LDO circuit voltage range in the current power supply...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05F1/46G05F1/56
CPCG05F1/468G05F1/56
Inventor 尹爱辉王宝勇于光远李欣秦昌龙王浩赵英杰武晓文
Owner STATE GRID SHANDONG ELECTRIC POWER
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