| 摘要 |
<p>A power supply unit for a mobile terminal and a power supply switching method for a mobile terminal. The power supply unit for a mobile terminal includes a battery (150), a power converting module (110), a charge management module (120), and a power switching module (130). Both the charge management module and the power converting module include a power input terminal for connecting an external power source (1). The charge management module is connected with the battery to charge the battery when the external power source is in connection. The power converting module is connected with the power switching module to convert an external power voltage into a power supply voltage needed by the mobile terminal and to control the on-off state of the power switching module. The power switching module is turned on and power is supplied to the mobile terminal from the battery when the external power source is not in connection. The power switching module is turned off and power is supplied to the mobile terminal from the power converting module and the battery is charged by the charge management module when the external power source is in connection. Thus, when the external power source is in connection, the external power source supplies power to the mobile terminal and the battery is charged without supplying power to the mobile terminal. It is adaptive to switch power of existing mobile phones and third generation (3G) mobile phones.</p> |
