Power supply apparatuses for preventing latch-up of charge pump and methods thereof

摘要

A power supply apparatus and a power supply method are disclosed. The power supply apparatus may include an internal power supply including a first voltage generator configured to generate a first voltage based on a pulse width modulation control signal, a charge pump configured to receive the first voltage and generate a second voltage, and an inrush current controller configured to be connected between the charge pump and the internal power supply and configured to generate the pulse width modulation control signal based on a target signal and a selection reference voltage.

主权项

1. A power supply apparatus comprising:
an internal power supply including a first voltage generator configured to generate a first voltage based on a pulse width modulation control signal; a charge pump configured to receive the first voltage and generate a second voltage; and an inrush current controller configured to be connected between the charge pump and the internal power supply and configured to generate the pulse width modulation control signal based on a target signal and a selection reference voltage, the inrush current controller including,
a reference voltage generator configured to output the selection reference voltage in response to a reference voltage selection signal, the reference voltage generator including,
a first generation circuit configured to divide a supply voltage using a plurality of resistors and generate a plurality of primary reference voltages based on dividing the supply voltage, anda selection circuit configured to output one of the primary reference voltages as the selection reference voltage in response to the reference voltage selection signal.