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US 9,431,894 B2Granted
Inductance variation based compensation in boost converter
AssigneeNXP B.V.
InventorsDong Li, Chan Yoke Cheong
Life of this patent
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Abstract
Aspects of the present disclosure are directed to method, circuits, and apparatuses for power conversion. In an example embodiment, an apparatus includes a boost converter having a current loop affected by at least one compensation correction parameter and variation in an inductance of the current loop. The apparatus also includes a power factor correction means, including a circuit, configured and arranged to adaptively modify the compensation correction parameter based on variation in the inductance of the current loop.
Claims10
A method comprising:
- using a boost converter having a current loop, an inductor in the current loop and a switching circuit, with the boost converter being affected by at least one compensation correction parameter and variation in an inductance of the current loop and with the switching circuit being configured and arranged to close in response to pulses of a control signal, the switching circuit increasing current through the inductor when closed;
- using a power factor correction circuit, adaptively modifying the compensation correction parameter based on variation in the inductance of the current loop and adjusting a gain of a feedback signal based on variation in the inductance of the inductor to maintain a substantially constant cross-over frequency of the boost converter;
- and,
- adjusting a pulse width of the pulses of the control signal based on the feedback signal.
1 more element
An apparatus, including
- a boost converter having a current loop affected by at least one compensation correction parameter and variation in an inductance of the current loop;
- and
- power factor correction circuit configured and arranged to adaptively modify the compensation correction parameter based on variation in the inductance of the current loop;
- a pulse width modulator configured modulate a width of pulses in a control signal based on a feedback signal, wherein
- the boost converter includes an inductor in the current loop and a switching circuit configured and arranged to increase current through the inductor when closed;
- the switching circuit is configured and arranged to close in response to the pulses of the control signal;
- and
- the power factor correction circuit is configured and arranged to adjust a gain of the feedback signal based on variation in the inductance of the inductor and to maintain a substantially constant cross-over frequency of the boost converter when inductance exhibited by the inductor is increased.
5 more elements
A method comprising:
- using a boost converter having a current loop, an inductor in the current loop and a switching circuit, with the boost converter being affected by at least one compensation correction parameter and variation in an inductance of the current loop and with the switching circuit being configured and arranged to close in response to pulses of a control signal, the switching circuit increasing current through the inductor when closed;
- and
- using a power factor correction circuit, adaptively modifying the compensation correction parameter based on variation in the inductance of the current loop and adjusting a gain of a feedback signal based on variation in the inductance of the inductor to prevent a cross-over frequency of the boost converter from reducing when inductance exhibited by the inductor is increased.
Dependencies are inferred from the claim text.