| 摘要 |
<p>A control circuit of a DC/DC converter stabilizing driving a current while supplying a driving voltage to a load comprises a current detection circuit for comparing a current detection signal indicative of a current flowing through a switching transistor of the DC/DC converter with a predetermined threshold to generate an OFF signal, a timer circuit for generating an ON signal that is asserted after a predetermined time period has elapsed since an assertion of the OFF signal, a pulse generation circuit for generating a pulse signal, and a driver for driving the switching transistor based on the pulse signal, where the timer circuit includes a first capacitor, a current source for generating a charging current, an arithmetic circuit for generating a threshold voltage, and an first comparator configured to compare a voltage of the first capacitor and the threshold voltage.</p> |
