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Switching power supply voltage regulator

A voltage regulator and switching power supply technology, which is applied in the direction of adjusting electrical variables, control/regulation systems, instruments, etc., can solve problems that affect the performance of electronic products, no response time, abnormal load operation, etc., to avoid abnormal load operation, The effect of extending the on-time

Inactive Publication Date: 2014-12-24
FITIPOWER INTEGRATED TECH INC
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

Therefore, the switching power supply voltage regulator does not have enough response time during the fast load transition, so when the circuit load changes from light load to heavy load, the output voltage of the switching power supply voltage regulator drops too low instantaneously, making the load work abnormally. And then affect the performance of electronic products

Method used

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Embodiment Construction

[0017] see figure 1 , figure 1 It is a schematic diagram of the circuit structure of the switching power supply voltage regulator 100 of the present invention. The switching power supply voltage regulator 100 is connected to a power supply 200 and a load 300 for regulating the power supply voltage Vin output by the power supply 200 and generating a corresponding output voltage Vout to supply power to the load 300 . The switching power supply voltage regulator 100 includes a PWM signal generating circuit 10 , an output circuit 20 and a feedback control circuit 30 . The PWM signal generating circuit 10 is used to generate the PWM signal Spwm. The output circuit 20 correspondingly generates an output voltage Vout according to the PWM signal Spwm output by the PWM signal generating circuit 10 , and provides the output voltage Vout to the load 300 . The feedback control circuit 30 correspondingly controls the conduction time or non-conduction time of the PWM signal Spwm generate...

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Abstract

The invention provides a switching power supply voltage regulator which comprises the components of: a pulse width modulating signal generating circuit, an output circuit and a feedback control circuit. The pulse width modulating signal generating circuit comprises a capacitor and a first comparator. The feedback control circuit comprises a switch and a second comparator. The capacitor receives power supply voltage which is output by a power supply for charging. The first comparator compares the voltage over the capacitor with a first reference voltage for generating the pulse width modulating signal. The output circuit correspondingly generates an output voltage according to the pulse width modulating signal. The switch is used for resetting the voltage over two ends of the capacitor. The second comparator compares the output voltage with a second reference voltage and controls for switching on / off the switch according to the comparison result, thereby adjusting on time or off time of the pulse width modulating signal. The switching power supply voltage regulator can realize stable operation performance of loads.

Description

technical field [0001] The invention relates to a switching power supply voltage regulator. Background technique [0002] Currently, power is usually supplied to a load, such as a central processing unit (CPU), through a switching power supply voltage regulator. Of course, the load current of the circuit is highly dynamic, and the change of load from light load to maximum load is sometimes very rapid. For example, the instantaneous change of the current of the CPU will be within 1 microsecond (μs), which is shorter than the switching cycle of the switching power supply voltage regulator. Therefore, the switching power supply voltage regulator does not have enough response time during the fast load transition, so when the circuit load changes from light load to heavy load, the output voltage of the switching power supply voltage regulator drops too low instantaneously, making the load work abnormally. And then affect the performance of electronic products. Contents of the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M3/156H02M1/08H02M3/06
Inventor 蓝瑞立
Owner FITIPOWER INTEGRATED TECH INC
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