JPS552381A - Dc-dc converter - Google Patents

Dc-dc converter

Info

Publication number
JPS552381A
JPS552381A JP4648779A JP4648779A JPS552381A JP S552381 A JPS552381 A JP S552381A JP 4648779 A JP4648779 A JP 4648779A JP 4648779 A JP4648779 A JP 4648779A JP S552381 A JPS552381 A JP S552381A
Authority
JP
Japan
Prior art keywords
noise
switching
radiator
terms
shield case
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.)
Granted
Application number
JP4648779A
Other languages
Japanese (ja)
Other versions
JPS5543356B2 (en
Inventor
Shiyouichi Ishii
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 Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura Electric Co Ltd
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 Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP4648779A priority Critical patent/JPS552381A/en
Publication of JPS552381A publication Critical patent/JPS552381A/en
Publication of JPS5543356B2 publication Critical patent/JPS5543356B2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Dc-Dc Converters (AREA)

Abstract

PURPOSE: To prevent radiation of a switching noise by connecting a radiator for the switching transistor to the AC input line in terms of DC.
CONSTITUTION: The radiator 22 for the switching transistor is connected to the AC input line 24 in terms of DC, the output transformer T is provided with a shielding electrode 32 which is for electrostatic shielding across the primary and secondary sides and is connected to the radiator 22 in terms of DC. A noise voltage produced in the switching transistors Q1, Q2 develops across the AC line and the shield case 23 through the group of capacities in Figure. Ca to Cd of these capacities form only a short circuit to the noise source 33, only Cf is concerned with the transfer of noise. However, the noise can be reduced by making the capacity of Ce greater than Cf. Thus the leakage of switching noise to the outside of the shield case 23 is remarkably reduced.
COPYRIGHT: (C)1980,JPO&Japio
JP4648779A 1979-04-16 1979-04-16 Dc-dc converter Granted JPS552381A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4648779A JPS552381A (en) 1979-04-16 1979-04-16 Dc-dc converter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4648779A JPS552381A (en) 1979-04-16 1979-04-16 Dc-dc converter

Publications (2)

Publication Number Publication Date
JPS552381A true JPS552381A (en) 1980-01-09
JPS5543356B2 JPS5543356B2 (en) 1980-11-06

Family

ID=12748560

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4648779A Granted JPS552381A (en) 1979-04-16 1979-04-16 Dc-dc converter

Country Status (1)

Country Link
JP (1) JPS552381A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5880719A (en) * 1981-11-09 1983-05-14 Sharp Corp Noise preventing circuit for switching regulator

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5880719A (en) * 1981-11-09 1983-05-14 Sharp Corp Noise preventing circuit for switching regulator

Also Published As

Publication number Publication date
JPS5543356B2 (en) 1980-11-06

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