Output current monitor circuit for switching regulator
First Claim
1. A circuit providing switching regulation with an improved current monitor comprising:
- an output stage configured to provide switching comprising a first and second transistor;
a sense circuit configured to provide signal sensing from the first transistor in said output stage;
a sampling switch circuit configured to provide sample signals from said sense circuit, wherein the sampling switch circuit is configured to provide a first and second signal to said integrator;
an integrator circuit configured to provide sample signals from said sampling switch circuit;
a comparator configured to provide signals from said integrator circuit; and
a digital-to-analog converter (DAC) configured to provide feedback signal from said comparator.
1 Assignment
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Accused Products
Abstract
A circuit and method for providing switching regulation with an improved current monitor comprising a pulse width modulation (PWM) controller configured to provide an output signal voltage, an output stage configured to provide switching comprising a first and second transistor, and first inverter, a sense circuit configured to provide signal sensing from said output stage, a sampling switch circuit configured to provide sample signals from said sense circuit, a differential integrator circuit configured to provide sample signals from said sampling switch circuit, a comparator configured to provide signals from said integrator circuit, a control logic circuit configured to provide signals from said comparator, a current digital-to-analog converter (DAC) configured to provide feedback signal from said control logic circuit, and, a digital filter configured to provide output current information.
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Citations
22 Claims
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1. A circuit providing switching regulation with an improved current monitor comprising:
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an output stage configured to provide switching comprising a first and second transistor; a sense circuit configured to provide signal sensing from the first transistor in said output stage; a sampling switch circuit configured to provide sample signals from said sense circuit, wherein the sampling switch circuit is configured to provide a first and second signal to said integrator; an integrator circuit configured to provide sample signals from said sampling switch circuit; a comparator configured to provide signals from said integrator circuit; and a digital-to-analog converter (DAC) configured to provide feedback signal from said comparator. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. A method of providing an improved current monitor in a switching regulator comprising the steps of:
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(a) providing a circuit comprising an output stage, a sense circuit, a sampling switch circuit, wherein said sampling switch circuit is configured to provide a first and second signal to an integrator circuit, said integrator circuit, a comparator, a DAC, and a feedback loop (b) initiating a NMOS signal to said NMOS of said output stage; (c) sensing a signal to a sense NMOS circuit providing a first and second, sense signals; (d) receiving said first and second sense signals to said sampling switch circuit; (e) integrating said first and second sense signals to said integration circuit; (f) comparing said integrated signal with said comparator signal; (g) processing said comparator signal; (h) feeding a feedback signal to said DAC; and (i) estimating the average output current. - View Dependent Claims (20, 21, 22)
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Specification