Power supply topology with power limiting feedback loop

A power supply system and maximum power technology, applied in the direction of output power conversion device, DC power input conversion to DC power output, collector, etc., can solve problems such as efficiency reduction

Inactive Publication Date: 2008-03-19
O2 MICRO INT LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since there is no closed-loop control, it is still necessary to use an adapter whose output voltage is much higher than the battery output voltage, and the aforementioned efficiency reduction problem still exists

Method used

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  • Power supply topology with power limiting feedback loop
  • Power supply topology with power limiting feedback loop
  • Power supply topology with power limiting feedback loop

Examples

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Embodiment Construction

[0014] The examples mentioned in the following detailed description are used to illustrate the present invention but not to limit the scope of the present invention to the scope of these examples. The invention is not limited to any particular circuit, voltage value, current value, battery chemistry, or other parameter.

[0015] Figure 1 is a block diagram of one embodiment of the present invention. In general terms, the AC / DC adapter 100 uses a power converter to convert an AC input voltage to a DC output voltage. In one embodiment of the present invention, the power converter is a flyback converter. The adapter's DC output voltage and current are connected to the input of an electronic device 200 comprising an input power rail, represented by line 206, comprising an active system 202 including a rechargeable battery 204 and an adapter controller 300. In one embodiment of the invention, the rechargeable battery 204 is a lithium-ion battery. In other embodiments of the inv...

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Abstract

A supply topology comprising an AC to DC or DC to DC adapter and an electronic device with an active system, a battery, and an adapter controller implements closed-loop control of adapter output voltage to limit power consumption by the electronic device to a value related to maximum adapter power. The adapter couples a signal representing maximum adapter power to a control line connected to the electronic device and the electronic device couples an error signal representing the difference between instantaneous power consumption and adapter maximum power onto the same control line. The adapter adjusts its output voltage in response to the magnitude of the error signal. An adapter controller in the electronic device sets a limit for allocating current to battery charging from the signal representing maximum adapter power, with battery charging current approaching zero as instantaneous power consumption approaches maximum adapter power. The adapter controller adjusts the limit for allocating current to battery charging in response to new values of adapter maximum power associated with alternate adapters connected to the electronic devices.

Description

technical field [0001] The present invention relates to power supply topologies, in particular a power supply circuit having an adapter generating a signal related to available power or maximum power, and electronic equipment configurable to receive such a signal. The present invention is applicable to portable electronic equipment, and is also applicable to other equipment powered by adapters. Background technique [0002] Many electronic devices, such as computers, mobile phones, radios, printers, and personal data assistants (PDAs), use alternating current / direct current (AC / DC) adapters or direct current / direct current (DC / DC) adapters to power the device and charge the device's battery Wait. AC to DC adapters, also known as "AC / DC adapters", "AC adapters" or "adapters", are usually connected to a room electrical outlet and convert 100-240 volts, 50-60 Hz AC power into a DC output for use by electronic devices . DC to DC adapter, also known as "DC / DC adapter", "DC ada...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J7/00H01M10/44H02M3/156
CPCY02B70/3225Y04S20/222Y02E60/12Y02E60/10
Inventor 亚力山德鲁·哈图拉多路·慈奥卡玛利安·尼古拉康斯坦丁·布克
Owner O2 MICRO INT LTD
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