Electric power device
A technology for a power supply device and a transmission device, which is applied to circuit devices, DC network circuit devices, electrical components, etc., can solve the problems of increasing current consumption and current consumption, and achieve the effect of reducing current consumption and power consumption.
Inactive Publication Date: 2009-04-08
MITSUMI ELECTRIC CO LTD
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- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Since the detection current If becomes larger, the current consumption on the secondary coil L12 side of the transformer 13 becomes larger.
In particular, on the side of the secondary coil L12 of the transformer 13, since the conversion efficiency of the transformer 13 is required, the current consumption becomes larger than that on the side of the primary coil L11 of the transformer 13.
Method used
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Embodiment Construction
[0028] FIG. 1 is a circuit structure diagram of an embodiment of the power supply device of the present invention. In this figure, the same components as in FIG. 3 are denoted by the same symbols, and their descriptions are omitted.
[0029] In the power supply device 100 of this embodiment, a current amplifier circuit 101 is provided between the photocoupler and the intermittent oscillation circuit.
[0030] The current amplifying circuit 101 is composed of a transistor Q10 and a resistor R10, together with the phototransistor Qp constituting the optocoupler 17 constitutes an amplifying circuit with a Darlington connection structure.
[0031] The transistor Q10 is composed of an NPN transistor. The voltage generated by the rectifying and smoothing circuit composed of diode D1 and capacitor C5 is applied to the collector of transistor Q10. The resistor R10 is connected between the base and the emitter of the transistor Q10. The linearity in the small current range of the cu...
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To reduce power consumption as the entire device, especially that under no load, with a power supply along with an electronic component, in which an output voltage is kept constant by controlling oscillation waveform according to a load. There are provided a transformer, a detecting means which detects an output voltage outputted from a secondary coil side of the transformer and generates a detection signal, transmission means which transmit the detection signal generated by the detecting means to a primary coil side of the transformer, and control means that control a voltage applied to the primary coil side of the transformer based on the output signal of the transmission means. The transmission coefficient of detection signal is so set in the transmission means that the output signal is kept within a signal range required for the control means and that the signal range of the detection signal is requisite minimum.
Description
technical field [0001] The present invention relates to a power supply device and an electronic component, in particular to a power supply device and an electronic component that control a vibration waveform along with a load to maintain a constant output voltage. Background technique [0002] FIG. 3 shows a circuit configuration diagram of an example of a conventional power supply device. [0003] The conventional power supply device 1 constitutes an RCC (Ringing Choke Converter) type switching regulator. [0004] It is composed of a bridge diode circuit 11, a smoothing circuit 12, a transformer 13, a control circuit 14, a rectifying and smoothing circuit 15, a detection circuit part 16, an optical coupler 17, and a switch transistor Q1. [0005] The input AC voltage / current is supplied to the bridge diode circuit 11 via R1. The bridge diode circuit 11 rectifies the input AC voltage / current. The voltage / current rectified by the bridge diode circuit 11 is supplied to the ...
Claims
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IPC IPC(8): H02J1/00H02M3/28
Inventor 村上幸司山中祐司
Owner MITSUMI ELECTRIC CO LTD