| 摘要 |
When the supply of electric power from a power supply (101) to a load (102) is controlled in a switching manner by a semiconductor switch (QA), reference current generating device (R11, Q2, Q3) generates a reference current, and reference voltage generating device (QB) generates a reference voltage (VDSB) based on the reference current. Detector CMP1 detects a difference between a terminal voltage (VDSA) of the semiconductor switch (QA) and the reference voltage, and the semiconductor switch (QA) is on/off controlled in accordance with the difference between the terminal voltage (VDSA) of the semiconductor switch (QA) and the reference voltage.
|
