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Power supply circuit with PFC inductance and TV set comprising said power supply circuit

A power supply circuit and TV technology, applied in TV, color TV, color TV parts, etc., can solve problems such as startup noise and poor system reliability, achieve the effect of eliminating startup noise, reducing production costs, and widening application fields

Active Publication Date: 2008-01-16
HISENSE +1
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0003] In order to solve the problem of starting noise and poor system reliability when the main control power supply controls other power supplies in the prior art by using a relay, the present invention provides a new type of power supply circuit with an active PFC inductor, through The simple circuit structure realizes the effective control of the main control power supply to other power supplies without using relays, which not only eliminates the starting noise, but also reduces the production cost and improves the reliability of the product

Method used

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  • Power supply circuit with PFC inductance and TV set comprising said power supply circuit

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Embodiment Construction

[0011] The present invention will be further described in detail below in conjunction with the drawings and specific embodiments.

[0012] In Figure 1, TI is a PFC energy storage inductor. One end is connected to an AC power source via a rectifier bridge, and the other end is connected to a subsequent circuit, usually without a secondary winding. Even if the secondary winding is added in some circuits with PFC inductors, it is mainly for sampling, such as the sampling circuit composed of the T-1 winding and the second resistor R1, the third resistor R2 and the capacitor C1 in Figure 1. In order to realize the function to be completed by the present invention, a secondary winding T-2 is added to the secondary of the PFC inductor T1. One end of the secondary winding T-2 is directly connected to the T-1 winding on the one hand, and on the other hand is connected to the T-1 winding through the series-connected second resistor R1, the third resistor R2 and the capacitor C1; the seconda...

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Abstract

The invention discloses a power circuit with PFC inductor and a television with the circuit, which comprises: adding secondary winding to the inductor and matching with corresponding control circuit to drive the power supply end of secondary power chip, setting its current protection end and controlling the power chip to cut off automatically. The invention has the advantages of realizing a plurality of power supplies work in one system simultaneously, of avoiding using relay with one power supply working as main control power supply.

Description

Technical field [0001] The present invention relates to an improvement of a power supply circuit, in particular, to an improvement of a power supply circuit with a source power factor correction PFC inductor. Background technique [0002] In the existing power circuit system, when multiple power sources coexist, there must be a problem that the main control power source needs to control other power sources. The usual method is to add a relay to cut off the high-voltage input, so as to realize the forced stop of other power sources. The use of this circuit structure is costly, and secondly, there will be a sound when the relay is started. Moreover, if a relay has been added to the standby circuit to control other circuits, there will be two relays in a power system. The situation not only increases the noise at startup, but also reduces the reliability of the system, which is not conducive to the widespread promotion and application of the product. Therefore, how to allow the main...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M1/14H04N5/63
Inventor 辛晓光刘广学
Owner HISENSE
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