POWER SUPPLY CIRCUIT, ELECTRONIC APPARATUS AND STEP-UP CONTROL METHOD

To provide a power supply circuit, an electronic apparatus, and a step-up control method capable of performing more stable and efficient voltage step-up.SOLUTION: A power supply circuit (60) includes: an oscillation circuit (631) for performing an oscillation operation according to input of an input voltage (Vin) and outputting an oscillation signal; a plurality of changeover parts (610) for a Dickson type charge pump circuit; capacitors (621 to 624); a first signal generation part (632) for generating a first clock signal for changing voltage at one ends of the capacitors; a first voltage detection part (641) for detecting the input voltage; and a second signal generation part (633) for generating a second clock signal for causing changeover an operation for turning on/off of the changeover parts in synchronizing with the first clock signal by input of a battery voltage (Vbat) different from the input voltage.SELECTED DRAWING: Figure 2 【課題】より安定して効率よく昇圧が可能な電源回路、電子機器及び昇圧制御方法を提供する。【解決手段】電源回路（６０）は、入力電圧（Ｖｉｎ）の入力に応じて発振動作し、発振信号を出力する発振回路（６３１）と、ディクソン型チャージポンプ回路に係る複数個の切替部（６１０）、キャパシタ（６２１～６２４）及びキャパシタの一端の電圧変化に係る第１のクロック信号を生成する第１信号生成部（６３２）と、入力電圧を検出する第１電圧検出部（６４１）と、入力電圧とは異なるバッテリ電圧（Ｖｂａｔ）の入力により第１のクロック信号と同期して切替部の開閉に係る切替動作を行わせる第２のクロック信号を生成する第２信号生成部（６３３）と、を備える。【選択図】図２