Three terminal voltage regulator circuit for power supply
A three-terminal voltage regulator, voltage regulation circuit technology, applied in instruments, regulating electrical variables, control/regulation systems, etc., can solve the problems of low power conversion efficiency and large heat dissipation, and achieve the effect of improving power conversion efficiency
Inactive Publication Date: 2013-09-18
HONG FU JIN PRECISION IND (SHENZHEN) CO LTD +1
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Problems solved by technology
[0004] In view of this, it is necessary to provide a three-terminal voltage regulator circuit for a power supply, which can solve the shortcomings of the three-terminal voltage regulator circuit in the prior art, such as low power conversion efficiency and large heat dissipation
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[0013] The present invention will be further described in detail below in conjunction with the accompanying drawings.
[0014] See also figure 2 , 3 , the power supply three-terminal voltage regulator circuit 20 can be applied to a power supply device for supplying power to electronic equipment (not shown in the figure). The power supply three-terminal voltage regulator circuit 20 includes a power supply voltage input terminal 21 , a power supply voltage output terminal 22 , a three-terminal voltage regulator 23 , a voltage regulation circuit 24 and a charging / discharging circuit 25 . Wherein, the three-terminal voltage regulator 23 includes an input port IN and an output port OUT, the first end 240 of the voltage regulation circuit 24 is connected to the power supply voltage input end 21, and the second end 241 is connected to the input port IN of the three-terminal voltage regulator 23 , the third terminal 242 is connected to the power supply voltage output terminal 22, a...
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The invention relates to a three terminal voltage regulator circuit for a power supply, which comprises a three terminal voltage regulator, a power supply voltage input end, a power supply voltage output end, a voltage regulating circuit and a charging / discharging circuit. An input end of the voltage regulating circuit is connected with the power supply voltage input end; a first output end of the voltage regulating circuit is connected with the three terminal voltage regulator; a second output end of the voltage regulating circuit and the charging / discharging circuit as well as the three terminal voltage regulator are connected to the power supply voltage output end together. When the power supply is switched in, a power supply current flows through the voltage regulating circuit and the three terminal voltage regulator to charge the charging / discharging circuit; the three terminal voltage regulator detects a voltage of the charging / discharging circuit; when the voltage value of the charging / discharging circuit reaches a preset voltage value, the three terminal voltage regulator is switched off and the voltage regulating circuit and the charging / discharging circuit supply power to electronic equipment together. After the three terminal voltage regulator circuit is utilized, the three terminal voltage regulator is controlled to be switched on and off by the voltage of the charging / discharging circuit so as to control the power supply to supply power to the electronic equipment, and thus, the conversion efficiency of the power supply is improved.
Description
technical field [0001] The invention relates to a voltage stabilizer circuit, in particular to a power supply three-terminal voltage stabilizer circuit capable of improving power output efficiency. Background technique [0002] The power supply three-terminal voltage regulator is a voltage conversion device commonly used in electronic circuits. It can convert the DC high voltage into any voltage that is less than the input voltage to Vref (the reference voltage of the power supply three-terminal voltage regulator), thereby converting the excess voltage ( The difference between the input voltage value and the output voltage value) is consumed in itself and dissipated in the form of heat energy. [0003] As people's requirements for energy saving and small and exquisite electronic products increase, portable electronic products have stricter requirements on the temperature rise of the casing. See figure 1 , is the schematic diagram of the existing power three-terminal voltag...
Claims
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IPC IPC(8): G05F1/14
CPCG05F1/563
Inventor 施用松
Owner HONG FU JIN PRECISION IND (SHENZHEN) CO LTD