| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a battery charge circuit having stable operation even in switching a charging mode, and to provide a battery charger. <P>SOLUTION: The battery charge circuit includes transistors 201, 202 for constituting a current mirror circuit for a transistor 200. A resistor R1 is connected to a source terminal of the transistor 201, and a resistor R2 is connected to a source terminal of the transistor 202. A switch circuit 14 is connected to each of the source terminals. The switch circuit 14 executes switching control in a small current mode and a fast mode. A current is supplied to the resistors R1, R2 from differently independent transistors to reduce a difference of phase delay due to CR time constant and thereby the operations of each charging mode, i.e., the small current mode or the fast mode can be stabilized. <P>COPYRIGHT: (C)2011,JPO&INPIT</p> |
