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US 11,152,845 B2Granted
Feed-forward function for voltage mode control
AssigneeMicrochip Technology Incorporated
InventorGheorghe Turcan
Life of this patent
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Abstract
An apparatus includes an input voltage, a comparator configured to generate a pulsed-width modulation signal based upon variation in the input voltage using a reference signal, and a switched mode power supply control circuit configured to control a power supply in voltage mode based at least upon the first pulsed-width modulation signal.
Claims20
An apparatus, comprising:
- an input voltage;
- a first comparator configured to generate a first pulsed-width modulation signal based upon variation in the input voltage using a reference signal and send the first pulsed-width modulation signal to further elements of the apparatus;
- a switched mode power supply (SMPS) control circuit, separate from the first comparator, configured to control a power supply in voltage mode based at least upon the first pulsed-width modulation signal;
- an operational amplifier configured to generate an error signal based on a differential between output of the power supply and a reference voltage;
- a signal generator circuit configured to generate a periodic signal based upon the first pulsed-width modulation signal;
- and
- a second comparator configured to:
- receive the error signal generated by the operational amplifier as a first input;
- receive the periodic signal generated by the signal generator circuit as a second input;
- and
- output a comparison of inputs of the second comparator to the SMPS control circuit.
8 more elements
A microcontroller, comprising:
- an input voltage;
- a first comparator configured to generate a first pulsed-width modulation signal based upon variation in the input voltage using a reference signal and send the first pulsed-width modulation signal to further elements of the apparatus;
- a switched mode power supply (SMPS) control circuit, separate from the first comparator, configured to control a power supply in voltage mode based at least upon the first pulsed-width modulation signal;
- an operational amplifier configured to generate an error signal based on a differential between of the power supply and a reference voltage;
- a signal generator circuit configured to generate a periodic signal based upon the first pulsed-width modulation signal;
- and
- a second comparator configured to:
- receive, at a first input of the second comparator, the error signal generated by the operational amplifier;
- receive, at a second input of the second comparator, the periodic signal generated by the signal generator circuit;
- and
- output a comparison of inputs of the second comparator to the SMPS control circuit.
8 more elements
A method, comprising:
- receiving an input voltage;
- generating a first pulsed-width modulation signal with a first comparator based upon variation in the input voltage using a reference signal;
- with a switched mode power supply (SMPS) control circuit separate from the first comparator, controlling a power supply in voltage mode based at least upon the first pulsed-width modulation signal;
- with an operational amplifier, generating an error signal based on a differential between output of the power supply and a reference voltage;
- with a signal generator circuit, generating a periodic signal based upon the first pulsed-width modulation signal;
- and with a second comparator:
- receiving the generated error signal;
- receiving the periodic signal generated by the signal generator circuit;
- and outputting a comparison of inputs of the second comparator to the (SMPS) control circuit.
6 more elements
Dependencies are inferred from the claim text.