| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To reduce voltage variation of a capacitor at the completion of charging. <P>SOLUTION: A comparator 100 outputs "High", when Vb≥Vref. A conversion transformer 140 releases accumulated magnetic energy from the secondary side. A comparator 104 outputs "High" to a flip-flop 106, when output voltage of the secondary side (partial pressure value Vb) becomes equal to or less than a GND level. A time detection part 107 counts output time Toff until the flip-flop 106 retains "High" after a switch element 124 is turned off. A logic part 120 continues charging control until Vb≥Vref (until charging completion voltage is detected), in the case of Toff>T1; but continues the charging control with increasing a setting value of input current Ip by one stage based on an Ip table, in the case of Toff≤T1. <P>COPYRIGHT: (C)2012,JPO&INPIT</p> |
