JPS61171487U

JPS61171487U -

Info

Publication number: JPS61171487U
Application number: JP5339185U
Authority: JP
Priority date: 1985-04-10
Filing date: 1985-04-10
Publication date: 1986-10-24

Description

[Brief explanation of the drawing]

第１図は本考案の１実施例構成図、第２図は第
１図図示本考案の１実施例構成の動作を説明する
動作説明図を示す。図中、１は外部機器、２は制御ＩＣ、２―１，
２―２は差動増幅器、２―３，２―４はダイオー
ド、３はスイツチング回路、４は昇圧トランス、
５は分圧回路、６は負荷、ＲＩは電流検出抵抗器
、Ｒ_１ないしＲ_１０は抵抗器、Ｄ_１およびＤ_２は
ダイオードを表す。 FIG. 1 is a configuration diagram of one embodiment of the present invention, and FIG. 2 is an operational explanatory diagram illustrating the operation of the configuration of one embodiment of the present invention shown in FIG. 1. In the figure, 1 is an external device, 2 is a control IC, 2-1,
2-2 is a differential amplifier, 2-3 and 2-4 are diodes, 3 is a switching circuit, 4 is a step-up transformer,
5 represents a voltage dividing circuit, 6 represents a load, RI represents a current detection resistor, R ₁ to R ₁₀ represent resistors, and D ₁ and D ₂ represent diodes.

Claims

[Claims for Utility Model Registration] (1) In a high voltage power supply device having a function of starting the device based on an external control signal, a switching signal generation circuit that generates a switching signal with a predetermined duty to generate high voltage; , a switching circuit that applies on/off controlled voltage to a step-up transformer using a signal generated by the switching signal generation circuit; a rectifier circuit that rectifies the voltage boosted by the step-up transformer; a current detection circuit that detects a current flowing when a high voltage rectified by the circuit is applied to a load;
and a first negative feedback circuit that negatively feeds back the voltage detected by the current detection circuit to the switching signal generation circuit, the control being negatively fed back from the first negative feedback circuit to the switching signal generation circuit. A high voltage power supply device characterized in that the output voltage is controlled on and off by supplying the external control signal in an overlapping manner with respect to the signal. (2) a voltage divider circuit that divides the high voltage rectified by the rectifier circuit; and a second negative feedback circuit that negatively feeds back the voltage divided by the voltage divider circuit to the switching signal generation circuit. and configured to negatively feed back the signal from the second negative feedback circuit in a manner that overlaps with the control signal that is negatively fed back from the first negative feedback circuit to the switching signal generation circuit to prevent overvoltage. A high voltage power supply device according to claim (1) of the utility model registration claim.