Apparatus for protecting power amp module
First Claim
1. A power amp module protecting apparatus of a mobile wireless phone comprising:
- means for supplying driving power for a power amp module;
a controller for generating a switching control signal;
switching means responsive to said switching control signal for passing said driving power to said power amp module;
overcurrent detecting means, connected between said switching means and said power amp module, for detecting overcurrent supplied by said means for supplying driving power, said overcurrent detecting means generating a high level detecting signal in response to detection of said overcurrent;
said switching means stopping the passing of said driving power to said power amp module in response to said high level detecting signal; and
said controller stopping the generation of said switching control signal in response to said high level detecting signal.
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Accused Products
Abstract
A power amp module protecting apparatus of a mobile wireless phone having: a power supply unit for supplying driving power to a power amp module; a switching unit, connected between the power supply unit and an overcurrent detector, for performing a switching action in accordance with a logic level of a switching control signal output from a controller and a logic level of an overcurrent detecting signal from the overcurrent detector; the overcurrent detector, connected between the switching unit and the power amp module, for outputting an overcurrent detecting signal having a high logic level in response to the detection of an overcurrent from the power supply unit; and the controller for outputting the switching control signal to switch on the switching unit when no overcurrent is detected, for maintaining the switching unit in an off state in response continued receipt of the overcurrent detecting signal of high logic level output from the overcurrent detector and outputting the switching control signal to switch on the switching unit, from a switched-off state, within a predetermined time.
27 Citations
10 Claims
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1. A power amp module protecting apparatus of a mobile wireless phone comprising:
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means for supplying driving power for a power amp module; a controller for generating a switching control signal; switching means responsive to said switching control signal for passing said driving power to said power amp module; overcurrent detecting means, connected between said switching means and said power amp module, for detecting overcurrent supplied by said means for supplying driving power, said overcurrent detecting means generating a high level detecting signal in response to detection of said overcurrent; said switching means stopping the passing of said driving power to said power amp module in response to said high level detecting signal; and said controller stopping the generation of said switching control signal in response to said high level detecting signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method for protecting a power amp module from overcurrent in a mobile wireless phone, said method comprising the steps of:
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generating a first control signal; controlling a switching unit in response to said first control signal for passing a drive signal to said power amp module; detecting an overcurrent in said drive signal passed by said switching unit; directly turning off said switching unit to prevent passing said drive signal to said power amp module in response to detection of said overcurrent; stopping said step of generating said first control signal when said overcurrent is detected; regenerating, after said stopping step, said first control signal after a predetermined period of time.
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Specification