APPARATUS AND METHODS FOR BOOST REGULATORS WITH DYNAMIC REGULATION BAND

摘要

Apparatus and methods for boost regulators with dynamic regulation band are disclosed. In certain configurations, a boost regulator system includes a boost regulator, a current source, and a light emitting element, such as a flash LED, that is controlled using a current generated by the current source. The boost regulator generates an output voltage that is used to power the current source. The boost regulator operates with a regulation band that changes based on a current level of the light emitting element.

主权项

1. A boost regulator system comprising:
a controllable light source including a first current source and a first light emitting element electrically connected in series with the first current source, the first current source configured to generate a current that controls an amount of light emitted from the first light emitting element; and a boost regulator configured to receive an input voltage and to generate an output voltage that powers the first current source, the boost regulator including a regulation band control circuit that controls a size of a regulation band of the boost regulator based on a current level of the first light emitting element.