Enabling circuit for avoiding negative voltage transients
First Claim
1. An enabling circuit for enabling a DC—
- DC converter having a capacitor coupled to an output terminal of said DC—
DC converter to be controlled by a control signal, said enabling circuit comprising;
a comparison circuit configured to compare a feedback signal representative of a charge on said capacitor with a signal representative of a reference charge and to provide an output to in response to said comparison to enable said DC—
DC converter to be controlled by said control signal if said charge on said capacitor is less than said reference charge; and
a discharge path configured to discharge said charge on said capacitor if said charge is greater than said reference charge.
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Accused Products
Abstract
An enabling circuit for enabling a DC—DC converter having a capacitor coupled to an output terminal of the DC—DC converter to be controlled by a control signal. The enabling circuit may include a comparison circuit configured to compare a feedback signal representative of a charge on the capacitor with a signal representative of a reference charge and to provide an output to in response to the comparison to enable the DC—DC converter to be controlled by the control signal if the charge on the capacitor is less than the reference charge. The enabling circuit may also include a discharge path configured to discharge the charge on the capacitor if the charge is greater than the reference charge. A related system and method are also provided.
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Citations
16 Claims
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1. An enabling circuit for enabling a DC—
- DC converter having a capacitor coupled to an output terminal of said DC—
DC converter to be controlled by a control signal, said enabling circuit comprising;a comparison circuit configured to compare a feedback signal representative of a charge on said capacitor with a signal representative of a reference charge and to provide an output to in response to said comparison to enable said DC—
DC converter to be controlled by said control signal if said charge on said capacitor is less than said reference charge; anda discharge path configured to discharge said charge on said capacitor if said charge is greater than said reference charge. - View Dependent Claims (2, 3, 4, 5, 6, 16)
- DC converter having a capacitor coupled to an output terminal of said DC—
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7. A system comprising:
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a DC—
DC converter configured to accept an input power level from a power source and provide a regulated output power level to a load, said DC—
DC converter having a capacitor coupled to an output terminal of said DC—
DC converter; andan enabling circuit for enabling said DC—
DC converter to be controlled by a control signal, said enabling circuit comprising;a comparison circuit configured to compare a feedback signal representative of a charge on said capacitor with a signal representative of a reference charge and to provide an output to in response to said comparison to enable said DC—
DC converter to be controlled by said control signal if said charge on said capacitor is less than said reference charge; anda discharge path to discharge said charge on said capacitor if said charge is greater than said reference charge. - View Dependent Claims (8, 9, 10, 11, 12)
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13. A method comprising:
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monitoring a charge on a capacitor of a DC—
DC converter coupled to an output terminal of said DC—
DC converter;comparing said charge to a reference charge; preventing said DC—
DC converter from being controlled by a control signal if said charge is greater than said reference charge; andenabling said DC—
DC converter to be controlled by said control signal if said charge is less than said reference charge. - View Dependent Claims (14, 15)
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Specification