Power IC with overshoot output prevention

An integrated circuit and anti-overshoot technology, which is applied in the direction of output power conversion devices, electrical components, electronic switches, etc., can solve the problems of large output overshoot, strong electromagnetic radiation and electromagnetic interference, shock oscillation, etc., and achieve open and close Fast speed, strong output drive capability, and low electromagnetic interference

Active Publication Date: 2008-08-27
WUXI CRYSTAL SOURCE MICROELECTRONICS CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There is a large overshoot, which leads to serious shock oscillation, relatively strong electromagnetic radiation and electromagnetic interference, large output overshoot, and easy damage to the switch tube, which reduces the reliability of the system.
Some foreign companies reduce the overshoot by reducing the output driving capability of PFC and PWM, so that the opening and closing speed of the output tube is low, which greatly reduces the conversion efficiency of the system

Method used

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  • Power IC with overshoot output prevention
  • Power IC with overshoot output prevention

Examples

Experimental program
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Embodiment Construction

[0009] The circuit is composed of a control signal input module 1, an output push module 2, an output module 3, an output detection module 4, and a push control module 5.

[0010] A schematic circuit diagram is given here ( figure 2 ), where the regulated voltage values ​​of Zener diodes Z1, Z2, and Z3 are all 5.0V. The resistor R1 is 2.0KΩ, R2 is 20KΩ, R3 is 6KΩ, R4 is 12KΩ, the β of the NPN tube is 100, and the β of the PNP tube is 45.

[0011] The output end of the pulse wave shaper 11 in the control signal input module 1 is respectively connected to the input end of the inverter 21 and the lower pipe pusher 23, the output end of the lower pipe pusher 23 is connected to the input end of the lower output pipe 32, and the upper pipe pusher 23 is connected to the input end of the lower output pipe 32. The output end of the pusher 22 is connected to the input end of the upper output tube 31, and the output ends of the upper output tube 31 and the lower output tube 32 are conn...

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PUM

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Abstract

The overshoot output prevention power supply circuit with power factor correction (PFC) and the pulse width modulation (PWM), relates to the output driving, it belongs to the PFC and the PWM output domain of the environmental protection power. It has many merits such as the little output overshoot (or without the over clash), the little disturb of the electromagnetism radiate, the high system switching efficiency, the stabilization of the output and the high reliability. The output of the outputting module (3) connect the first measuring machine (41), the second output measuring machine (42), the third output measuring machine (43) of the output measuring module (4), the output of the first output measuring machine (41) connects the pushing controlling module (5) to close the process controlling machine(51), the second output measuring machine (42) connects the unlocking process controlling machine(52) of the pushing controlling module (5), the output of the third output measuring(43) connects the unlocking fulfilling controlling machine(53) of the pushing controlling module(5), shutting the output of the process controlling machine(51) connects the below duct driving machine(23) of the output pushing module(2), the output of the unlocking process machine(52) and the unlocking fulfilling controlling machine(53) are connected to connect the above duct driving machine(22) of the output pushing module(2).

Description

technical field [0001] The invention is a power supply integrated circuit with power factor correction (PFC) and pulse width modulation (PWM) output overshoot prevention. It mainly involves the output driving part, and belongs to the field of PFC and PWM output driving of energy-saving and environment-friendly power supply. Background technique [0002] At the present stage, the PFC and PWM output drivers of domestic and foreign power supply integrated circuits do not have this kind of anti-overshoot function. There is a large overshoot, which leads to serious shock oscillation, relatively strong electromagnetic radiation and electromagnetic interference, large output overshoot, and easy damage to the switch tube, which reduces the reliability of the system. Some foreign companies reduce the overshoot by reducing the output driving capability of PFC and PWM, so that the opening and closing speed of the output tube is low, which greatly reduces the conversion efficiency of t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M1/08H03K17/00H03K17/04H03K17/0416H03K17/042
CPCY02P80/10
Inventor 朱伟民雍广虎聂卫东陈东勤张艳丽
Owner WUXI CRYSTAL SOURCE MICROELECTRONICS CO LTD
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