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Isolated Power Converter with Output Voltage Protection

A power converter, isolated technology, applied in the direction of output power conversion device, high-efficiency power electronic conversion, emergency protection circuit device, etc.

Active Publication Date: 2021-10-08
NXP BV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] These and other issues have presented challenges to the efficiency of converter and voltage protection implementations for a variety of applications

Method used

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  • Isolated Power Converter with Output Voltage Protection
  • Isolated Power Converter with Output Voltage Protection
  • Isolated Power Converter with Output Voltage Protection

Examples

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Embodiment Construction

[0022] Aspects of the present disclosure are believed to be applicable to many different types of devices, systems and methods involving circuitry on the secondary side of an isolated power converter that The switch draws power when a supply voltage from the primary side is present at the secondary side, and uses the drawn power to cause the load switch to operate in an off mode in response to the sudden disconnection of the secondary side from the supply voltage. In certain embodiments, aspects of the present disclosure have been shown to be beneficial when used in the context of a charger configured to deliver power to a load (e.g., a cell phone) that has a response to the charger The secondary side of the charger is disconnected from the supply voltage of the primary side of the charger and the circuitry that limits the output voltage delivered to the load. In some embodiments, circuitry on the secondary side (eg, an optocoupler) draws power, and in the absence of a supply ...

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PUM

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Abstract

The present invention provides an apparatus for delivering power to a load comprising an isolated power converter converting input power on a primary side to output power and a supply voltage at a node on a secondary side. On the secondary side, a load switch is located on the current path to the load. Secondary-side control circuitry controls the load switch to operate in an on-mode in which current is provided to the load and switches the load switch in response to a fault condition corresponding to an effective snap-off of the supply voltage. switching to an off mode in which the current path to the load is blocked.

Description

technical field [0001] Aspects of the present disclosure relate to isolated power conversion circuits (eg, isolated power converters such as flyback converters) in which AC / DC power is converted across galvanic isolation to DC power. Background technique [0002] In various instances, demands are increasing on the amount of power delivered by converters to circuitry. For example, mobile phones have consumer demand for faster charging. High voltage can be used to deliver fast charging to the battery pack. The voltage delivered to the circuitry must also be compatible with the converter, such as a charger for a mobile phone. Many chargers operate starting at 5 volts (V) and negotiate the voltage to a higher voltage, eg, 9V, 12V, or 20V. Different standards are used to negotiate voltages, such as Universal Serial Bus Power Delivery (USB-PD) and / or Fast Charging, among others. In the event of a fault condition, the connected circuitry needs to be protected. [0003] These a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M7/217H02M3/335H02H7/12
CPCH02H7/1213H02M3/33561H02M3/33592H02M7/217H02M1/32H02M3/33523H02M1/0032Y02B70/10H02M1/08
Inventor 威廉默斯·辛德里库斯·玛里亚·朗厄斯兰格杰罗恩·克莱彭宁
Owner NXP BV
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