[go: up one dir, main page]

JPS5642816A - Stabilized electric power supply unit - Google Patents

Stabilized electric power supply unit

Info

Publication number
JPS5642816A
JPS5642816A JP11721779A JP11721779A JPS5642816A JP S5642816 A JPS5642816 A JP S5642816A JP 11721779 A JP11721779 A JP 11721779A JP 11721779 A JP11721779 A JP 11721779A JP S5642816 A JPS5642816 A JP S5642816A
Authority
JP
Japan
Prior art keywords
voltage
switching
time duration
feedback
given
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP11721779A
Other languages
Japanese (ja)
Inventor
Katsuyuki Ide
Katsuaki Nakano
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toshiba Electric Equipment Corp
Original Assignee
Toshiba Electric Equipment Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Toshiba Electric Equipment Corp filed Critical Toshiba Electric Equipment Corp
Priority to JP11721779A priority Critical patent/JPS5642816A/en
Publication of JPS5642816A publication Critical patent/JPS5642816A/en
Pending legal-status Critical Current

Links

Landscapes

  • Dc-Dc Converters (AREA)

Abstract

PURPOSE: To maintain the switching loss at a certain level and thus increase the stability of the output, by providing a feedback circuit to give a control to the oscillation frequency of the pulse control circuit.
CONSTITUTION: With increase of the power source voltage Vin, the switching time duration is liable to be reduced by the feedback given from the feedback circuit 20. At the same time, the oscillation frequency of the pulse duration control circuit 16 is reduced by the feedback from the feedback circuit 24. Thus the on/off periods of the transistor 15 are increased. As a result, the off period is increased with no change given to the switching time duration, and a constant level is secured for the output voltage VO. On the contrary, the oscillation frequency increases with reduction of the voltage VIN, and accordingly the period is reduced with no change given to the switching time duration. Thus a constant level is secured for the voltage VO in the same way. In such way, the time duration of switching is always constant in case when a constant voltage function is given to the fluctuation of the voltage VIN, thus maintaining the minimum loss for the swiching. As a result, the stability is more increased for the output voltage, at the same time increasing the efficiency of conversion.
COPYRIGHT: (C)1981,JPO&Japio
JP11721779A 1979-09-14 1979-09-14 Stabilized electric power supply unit Pending JPS5642816A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11721779A JPS5642816A (en) 1979-09-14 1979-09-14 Stabilized electric power supply unit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11721779A JPS5642816A (en) 1979-09-14 1979-09-14 Stabilized electric power supply unit

Publications (1)

Publication Number Publication Date
JPS5642816A true JPS5642816A (en) 1981-04-21

Family

ID=14706286

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11721779A Pending JPS5642816A (en) 1979-09-14 1979-09-14 Stabilized electric power supply unit

Country Status (1)

Country Link
JP (1) JPS5642816A (en)

Similar Documents

Publication Publication Date Title
JPS5292321A (en) Power supply circuit
JPS5528680A (en) Oscillation circuit
JPS55109003A (en) Oscillation circuit
JPS52147753A (en) Switching type dc stabilized power supply
JPS5515056A (en) Electronic watch
JPS5642816A (en) Stabilized electric power supply unit
JPS55150791A (en) Motor driving circuit
JPS55143841A (en) Oscillating circuit
ATE79995T1 (en) SWITCHING POWER SUPPLY.
JPS5333347A (en) Power supply circuit of switching control type
JPS5367848A (en) Output voltage compensating circuit for dc power source
JPS55141973A (en) Control system of switching power supply device
JPS55103079A (en) Switching regulator
JPS6420000A (en) Voltage regulator
JPS5295026A (en) Dc/dc converter
JPS56105516A (en) Direct current regulated power supply
JPS53129948A (en) Automatic gain control unit
JPS54109876A (en) Electronic watch
JPS5734223A (en) Power supply circuit
JPS55114181A (en) Switching power supply
JPS5469945A (en) Oscillator circuit
JPS5523764A (en) Separately-excited dc-dc converter
JPS55125078A (en) Switching power supply
JPS5390813A (en) Chopper-type regulator circuit
JPS5678371A (en) Dc-dc converter circuit