POWER SUPPLY CIRCUITRY AND ADAPTIVE TRANSIENT CONTROL

摘要

A control circuitry can be configured to receive an error signal indicating a difference between an output voltage of the power supply and a desired setpoint for the output voltage. According to one configuration, depending on the error signal, the control circuitry initiates switching between operating the control circuitry in a pulse width modulation mode and operating the control circuitry in a pulse frequency modulation mode to produce an output voltage. Operation of the control circuitry in the pulse frequency modulation mode during a transient condition, such as when a dynamic load instantaneously requires a different amount of current, enables the power supply to satisfy current consumption by the dynamic load. Subsequent to the transient condition, the control circuitry switches back to operation in the pulse width modulation mode.

主权项

1. A power supply to generate an output voltage, the power supply comprising:
a monitor circuit operable to produce an error signal indicating a difference between the output voltage and a desired setpoint; first control circuitry operable to generate period setting information based on the error signal; second control circuitry operable to generate pulse width setting information based on the error signal; and a mode control circuit operable to control the first control circuitry and the second control circuitry to switch between a frequency modulation control mode and a pulse width modulation control mode.