PWM controller with single-cycle response
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United States of America Patent
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Feb 11, 2003
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N/A
app pub date -
Dec 27, 2001
filing date -
Mar 16, 2001
priority date (Note) -
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Abstract
A single-cycle response pulse width modulator comprising a single error integrating amplifier. The error integrator output is compared to zero to set a flip-flop. A linear ramp voltage is compared to the reference voltage to reset the flip-flop. The linear ramp voltage is generated by a voltage-controlled current source coupled to the supply voltage and charging a capacitor. The flip-flop when reset discharges the capacitor. Corrective circuits compensate for delay times in components to maintain substantially constant switching frequency and low distortion in the output voltage. The controller is capable of outputting a predictive triggering signal for associated class-N amplifiers.
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