JPH09266629A - Power controller for portable machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To sharply extend the drive time by a battery by sharply reducing the dark current at the time of stand-by during power off. SOLUTION: A power circuit 2A, which outputs the drive voltage of an operated circuit 4, and a regulator 6, which outputs the operation voltage Vd of a power on/off control circuit 3, are connected to a battery 1, and the operation and the nonoperation of the power circuit 2A are controlled by the on/off signal S outputted by this control circuit 3.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a power supply control device for a mobile device such as a mobile phone or a wireless device, which uses a power supply circuit such as a switching power supply, a DC / DC converter or the like or a power supply circuit controlled by an ON / OFF signal.

[0002]

2. Description of the Related Art FIG. 2 is a connection diagram showing a configuration of an example of a conventional device. In FIG. 2, reference numeral 1 is a battery that is attached to and detached from the portable device main body 2, 2 is a power supply circuit such as a switching power supply and a DC / DC converter connected to the battery 1, and 3 is a voltage output from the power supply circuit 2 which is an operating voltage Vd. A power source on / off control circuit, 5 is a power switch, 4 is an operated circuit driven by the voltage output from the power circuit 2 as a drive voltage Vc, 7 is a supply of the drive voltage Vc to the operated circuit 4, It is a control switching element that stops supply, and is turned on / off by an on / off signal S output from the power on / off control circuit 3.

In this conventional example, the power supply circuit 2 is operated by the battery 1, and the power supply on / off control circuit 3 is operated by the operating voltage Vd output from the power supply circuit 2. The control switching element 7 is turned on / off by the ON / OFF signal S output from the control circuit 3, whereby the drive voltage Vc output from the power supply circuit 2 is intermittently supplied to the operated circuit 4. Thus, the power supply circuit 2 used in the mobile phone is
Since it can be driven even when the power is off, it oscillates only with dark current.

[0004]

However, in the above-mentioned conventional example, since the operating voltage Vd of the power supply ON / OFF control circuit 3 is always supplied from the power supply circuit 2, the drive voltage of the operated circuit 4 is driven. Even when Vc is not supplied to the actuated circuit 4 because the control switching element 7 is off, the power supply circuit 2 is oscillating, and therefore the power supply on / off control circuit 3
Operating current ia and switching loss ib of power supply circuit 2
There is a problem that the dark current of the sum of the above flows from the battery 1, and depending on the power supply circuit 2, the loss ib increases regardless of the magnitude of the operating current ia, and the driving time by the battery 1 is significantly shortened.

[0005]

In order to solve the above-mentioned problems, the device of the present invention, as shown in FIG. 1, supplies a power supply circuit 2A for outputting a drive voltage Vc of an actuated circuit 4 to a battery 1 and a power supply ON / OFF. A regulator 6 for outputting an operating voltage Vd of the off control circuit 3 is connected to the power on / off control circuit 3
It is characterized in that the ON / OFF signal S outputted further controls the operation / non-operation of the power supply circuit 2A.

With such a configuration, the power supply on / off control circuit 3 is operated by the operating voltage Vd obtained from the battery 1 through the regulator 6, and the on / off signal output from the power supply on / off control circuit 3 is output. The operation / non-operation of the power supply circuit 2A is controlled by S, whereby the drive voltage Vc output from the power supply circuit 2A is intermittently supplied to the operated circuit 4.

[0007]

1 is a connection diagram showing the configuration of an embodiment of the device of the present invention. First, the configuration of this embodiment will be described. In the present embodiment, the operating voltage Vd of the power supply circuit 2A for outputting the drive voltage Vc of the operated circuit 4 and the power supply on / off control circuit 3 to the battery 1 which is attached to and detached from the main body 8 of the portable device.
Is connected to the power source ON / OFF control circuit 3 and an ON / OFF signal S output from the power source ON / OFF control circuit 3 controls the operation and non-operation (oscillation stop) of the power supply circuit 2A.

Next, the operation of this embodiment having the above configuration will be described. The voltage of the battery 1 is input to the regulator 6, which outputs the operating voltage Vd. The power supply on / off control circuit 3 operates by this operating voltage Vd, and the on / off signal S is output from this. The operation / non-operation of the power supply circuit 2A is controlled by the ON / OFF signal S, whereby the drive voltage Vc output from the power supply circuit 2A is intermittently supplied to the operated circuit 4.

As described above, the operating voltage Vd of the power on / off control circuit 3 is always supplied from the regulator 6, and the on / off signal S output from the power on / off control circuit 3 is output.
Since the operation and non-operation of the power supply circuit 2A are controlled by the power supply circuit 2A, when the drive voltage Vc of the operated circuit 4 is not supplied to the operated circuit 4, the power supply circuit 2A is in the non-operational state.
The loss of dark current when the supply of the drive voltage Vc is stopped when the power supply circuit 2A is not operating can be reduced as compared with the conventional case.

[0010]

As described above, according to the present invention, the operating voltage Vd of the power supply ON / OFF control circuit 3 is supplied from the regulator 6 rather than the power supply circuit 2A which supplies the drive voltage Vc to the operated circuit 4, By controlling the operation / non-operation of the power supply circuit 2A by the ON / OFF signal S output from the power supply ON / OFF control circuit 3, it is possible to significantly reduce the dark current during standby when the power supply is turned off. The driving time by can be significantly extended.

[Brief description of drawings]

FIG. 1 is a connection diagram showing a configuration of an embodiment of a device of the present invention.

FIG. 2 is a connection diagram showing a configuration of an example of a conventional device.

[Explanation of reference symbols] 1 battery 2 power supply circuit 2A power supply circuit 3 power supply on / off control circuit 4 operated circuit 5 power supply switch 6 regulator 7 control switching element 8 portable device body

Claims (1)

[Claims] 1. A battery is connected to a power supply circuit that outputs a drive voltage of a circuit to be operated and a regulator that outputs an operating voltage of a power supply on / off control circuit, and the power supply is supplied by an on / off signal output from the control circuit. A power supply controller for a portable device, which controls the operation and non-operation of a circuit.