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Semiconductor integrated circuit and method for operating same

A technology of integrated circuits and semiconductors, applied in electrical components, adjusting electrical variables, instruments, etc., can solve the problems of the performance degradation of the stabilized power supply circuit and the difficulty in realizing the stabilized power supply, and achieve the effect of reducing the increase

Inactive Publication Date: 2015-07-22
RENESAS ELECTRONICS CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As a result, according to this method, it is difficult to realize the constant voltage setting operation performance for suppressing the output voltage variation, which is the original purpose of stabilizing the power supply.
That is, according to this method, even if the fluctuation of the output voltage caused by the increase of the equivalent series resistance (ESR) of the smoothing capacitor can be suppressed, there is a function of suppressing the fluctuation of the output voltage caused by the fluctuation of the input voltage or the fluctuation of the load current as a stabilized The original performance of the power supply circuit is degraded. This fact has been clearly understood by the inventors of the present application prior to the present invention.

Method used

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  • Semiconductor integrated circuit and method for operating same
  • Semiconductor integrated circuit and method for operating same
  • Semiconductor integrated circuit and method for operating same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0129] "Structure of Electronic Device Utilizing Stabilized Power Supply Circuit"

[0130] figure 1 It is a diagram showing the structure of an electronic device using a stabilized power supply circuit 1 using the semiconductor integrated circuit 10 of the first embodiment.

[0131] The electronic device is composed of an unstabilized power supply 2, a stabilized power supply circuit 1, and a load circuit 3. The output voltage (Vin) of the unstabilized power supply 2 can be set to a voltage outside the recommended operating power supply range of the load circuit 3. The high-voltage side terminal (+) of the unstabilized power supply 2 is connected to the input terminal Vin of the stabilized power supply circuit 1, and the low-voltage side terminal (-) of the unstabilized power supply 2 is connected to the ground voltage GND. The stabilized power supply circuit 1 is configured to supply the load circuit 3 with an output voltage Vout generated by converting the input voltage Vin int...

Embodiment approach 2

[0300] Figure 23 It is a diagram showing the structure of an electronic device using a stabilized power supply circuit 1 using the semiconductor integrated circuit 10 of the second embodiment.

[0301] Figure 23 The stabilized power supply circuit 1 using the semiconductor integrated circuit 10 of the second embodiment shown and figure 1 The illustrated stabilization power supply circuit 1 using the semiconductor integrated circuit 10 of the first embodiment is different in that: Figure 23 The stabilized power supply circuit 1 using the semiconductor integrated circuit 10 of the second embodiment is a boost-type stabilized power supply circuit.

[0302] First of all, the first difference is as follows.

[0303] because Figure 23 The stabilized power supply circuit 1 using the semiconductor integrated circuit 10 of the second embodiment operates as a boost-type stabilized power supply circuit. During the on period T ON The smoothing coil L storing magnetic energy is connected betw...

Embodiment approach 3

[0316] Figure 24 It is a diagram showing the structure of an electronic device using a stabilized power supply circuit 1 using the semiconductor integrated circuit 10 of the third embodiment.

[0317] Figure 24 The stabilized power supply circuit 1 using the semiconductor integrated circuit 10 of the third embodiment shown and figure 1 The illustrated stabilization power supply circuit 1 using the semiconductor integrated circuit 10 of the first embodiment is different in that: Figure 24 The stabilized power supply circuit 1 using the semiconductor integrated circuit 10 of the third embodiment is a stabilized power supply circuit of a series regulator type.

[0318] That is, in order to Figure 24 The stabilized power supply circuit 1 using the semiconductor integrated circuit 10 of the third embodiment operates as a series regulator-type stabilized power supply circuit, and passes the error amplifier 11 so that the output voltage Vout becomes constant even if the input voltage V...

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Abstract

A semiconductor integrated circuit that is used for a stabilizing power supply circuit which supplies an output power supply voltage to a parallel connection of a smoothing capacitor and a load, from an input power supply voltage, includes an error amplifier that detects an error of the output power supply voltage, an output control circuit that is connected between the input terminal and the output terminal, a phase compensation circuit that is connected to the error amplifier, and a detection control circuit that is connected to the phase compensation circuit.

Description

Technical field [0001] The present invention relates to a semiconductor integrated circuit used in a stabilized power supply and its operating method, and in particular to preventing instability and abnormality of the stabilized power supply caused by an increase in the equivalent series resistance (ESR) of an electrolytic capacitor at low temperatures Technology to effectively reduce the increase of external components during oscillation. Background technique [0002] As we all know, stabilized power supplies include series regulators and switching regulators. [0003] In a series regulator, an output control circuit is connected in series between the input voltage and the load, and the voltage drop of the output control circuit is controlled by an error amplifier. The error amplifier compares the divided voltage of the output voltage of the load with the reference voltage and controls the output control circuit so that the divided voltage of the output voltage of the load is equ...

Claims

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Application Information

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IPC IPC(8): G05F1/56
CPCH02M3/156G05F1/56G05F1/567H02M1/14H02M1/0025
Inventor 林健太郎林丰
Owner RENESAS ELECTRONICS CORP
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