| 摘要 |
PURPOSE: A low-cost back converter of a plurality of outputs is easily form by adding a single inductor, a single pulse-width modulator integrated circuit, and two MOSFETs, and using an additional MOSFET and one or more capacitors for each voltage output. CONSTITUTION: The input of a converter(10) is connected to a MOSFET(16) and an inductor(18) via a MOSFET(14). The indoor(18) is connected to a charge storage element such as a capacitor(24), etc., via the first MOSFET(22). Additionally, a MOSFET(22) is connected to a first voltage output(28). The MOSFETs(14,16,22) are controlled by a pulse width modulator(26). Moreover, a MOSFET(30) is connected between the inductor(18) and the MOSFET(22) and is connected to a capacitor(32) and a second voltage output(36). The second output(36) is connected to a pulse width modulator(34) which controls the MOSFET(30). In addition, the pulse modulators(26,34) are formed by a single integrated circuit arranged on a single semiconductor chip.
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