公开(公告)号：EP0749199A1

公开(公告)日：1996-12-18

申请号：EP96108602.2

申请日：1996-05-30

申请人： MOTOROLA SEMICONDUCTEURS S.A.

发明人： L'Hermite, Francois ,  Pauk, Ondrej

IPC分类号： H02M3/335 ,  H04N5/63

CPC分类号： H04N5/63 ,  H02M3/33507 ,  H02M2001/0032 ,  H02M2001/009 ,  Y02B70/16

摘要： A power supply for an electric appliance having an operating mode and a standby mode includes a transformer block (9) for producing a constant power output into two low voltage outputs (Vc and Vcc), an operating power supply circuit (2) coupled to one of the two low voltage outputs (Vcc) to power the appliance during the operating mode, and a receiver circuit (3) coupled to the other low voltage output via an impedance path (14, 15). The receiver circuit (3) includes a switch (17) for switching a very low impedance into a path parallel with the first impedance when it receives a signal indicating that the appliance is to enter the standby mode, so that the voltage at the other low voltage output (Vcc) is reduced, thereby increasing the current drawn by the receiver circuit (3) and thus reducing the power available to the operating power supply circuit (2).

摘要翻译： 具有操作模式和待机模式的电器的电源包括用于产生输出到两个低电压输出（Vc和Vcc）的恒定功率的变压器块（9），耦合到一个的工作电源电路（2） 的两个低电压输出（Vcc）以在操作模式期间为器具供电;以及接收器电路（3），其经由阻抗路径（14,15）耦合到另一低电压输出。 接收器电路（3）包括开关（17），用于在接收到指示器具进入待机模式的信号时将非常低的阻抗切换成与第一阻抗平行的通路，使得另一低电平 电压输出（Vcc）减小，从而增加由接收器电路（3）吸收的电流，从而降低可用于工作电源电路（2）的功率。