JPH0410588U

JPH0410588U -

Info

Publication number: JPH0410588U
Application number: JP4883590U
Authority: JP
Priority date: 1990-05-10
Filing date: 1990-05-10
Publication date: 1992-01-29

Description

[Brief explanation of drawings]

第１図はこの考案の実施例を示すブロツク図、
第２図は上記実施例の電流検出部を示す回路図、
第３図電流検出部の他の実施例を示す回路図であ
る。１……交流電源、２……スイツチング電源装置
、３……電子装置、４……１次側整流平滑回路、
５……スイツチング部、６……スイツチング制御
部、７……高周波トランス、８……２次側整流平
滑回路、９……電流検出部、９１……基準電源、
９２……増幅器、９３……定電圧ダイオード。 Figure 1 is a block diagram showing an embodiment of this invention.
FIG. 2 is a circuit diagram showing the current detection section of the above embodiment;
FIG. 3 is a circuit diagram showing another embodiment of the current detection section. 1... AC power supply, 2... Switching power supply device, 3... Electronic device, 4... Primary side rectification smoothing circuit,
5...Switching section, 6...Switching control section, 7...High frequency transformer, 8...Secondary side rectification and smoothing circuit, 9...Current detection section, 91...Reference power supply,
92... Amplifier, 93... Constant voltage diode.

Claims

[Scope of Claim for Utility Model Registration] In a switching power supply device that supplies DC output power to a load side through the operation of a switching means, a current detection means for detecting a load current and comparing it with a predetermined reference value; A switching power supply device comprising switching control means for switching the switching operation of the switching means from continuous operation to intermittent operation when the means detects that the load current has become smaller than a reference value.