Quick starting power supply for power chip

A fast-start, power chip technology, used in electric light sources, light sources, electrical components, etc.

Active Publication Date: 2010-08-11
灿芯创智微电子技术(北京)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the slow start characteristic of the internal power supply, it cannot supply power immediately after power-on

Method used

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  • Quick starting power supply for power chip
  • Quick starting power supply for power chip

Examples

Experimental program
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Effect test

Embodiment Construction

[0015] based on the following figure 1 , specify the preferred embodiment of the present invention:

[0016] Such as figure 1 Shown is the circuit diagram of the quick start power supply for the power chip;

[0017] The gate bias transistor MP7 and PMOS (P-channel metal oxide semiconductor) transistors MP8, MP9, MP10 form a bias current circuit, and the gate bias transistor MP7 and PMOS transistors MP8, MP9, MP10 are all composed of a reference voltage circuit The PTAT current generated by (Bandgap) provides bias current, and the reference voltage circuit is directly powered by DC high voltage VHV, which can start quickly so as to provide PTAT current during power-on;

[0018] A number of PMOS transistors MP1~MPX connected in series with the gate and drain ends short-circuited form an initial voltage circuit. The initial voltage circuit is supplied with current by MP8 in the bias current circuit, and generates an initial voltage V1 that is input to the voltage modulation cir...

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PUM

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Abstract

The invention relates to a quick starting power supply for a power chip, which comprises a bias current circuit, an initial voltage circuit, a voltage modulation circuit, a current mirror circuit and a logic control circuit which are in circuit connection with each other. Since quick starting voltage is introduced in the power chip, when power is on, the logic inside the power chip can be correctly realized. Under the starting and normal working states, a composite power supply can automatically switch between the quick starting voltage and output voltage of an internal circuit. With the ability of quick starting when power is on, the composite power supply can correctly initialize the power chip before the power-on reset signals are in high level, and after the power-on reset signals arein high level, the composite power supply can stably supply power to the logic circuit and the control circuit in the power chip.

Description

technical field [0001] The invention relates to a quick-start power supply for a power chip, in particular to a quick-start power supply for an AC-DC energy-saving lamp power chip. Background technique [0002] In the AC-DC energy-saving lamp power chip, the 220V AC input is the only power source. After rectification and filtering circuits, a high DC voltage (VHV) is used to drive chips and energy-saving lamps. Inside the chip, all logic and control circuits are made of low-voltage CMOS (Complementary Metal Oxide Semiconductor). Therefore, there will be an internal power supply (Linear Regulator) in the chip to convert the externally input DC high voltage (VHV) into a DC low voltage (VREG) for powering logic and control circuits. To stabilize the loop of the internal power supply and reduce transient voltage fluctuations, a large external capacitor is connected at the output of the internal power supply. Due to the presence of this large capacitor, the feedback loop of th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H05B41/282
Inventor 职春星李应天胡永华徐滔惠国瑜
Owner 灿芯创智微电子技术(北京)有限公司
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