Driving device
AssigneeRohm Co., Ltd.
InventorsShinji Kawata, Yoichi Kajiwara
Life of this patent
Estimating the term…
Abstract
A driving device comprises a first transistor (B13), a second transistor (B14), and a resistance element. The first transistor (B13) has one terminal receiving a pulsed current and a control terminal connected to the one terminal. The second transistor (B14) has one terminal connected to at least one load, the other terminal connected to a reference potential together with the other terminal of the first transistor (B13), and a control terminal connected to the control terminal of the first transistor (B13). The resistance element is connected between the control terminal of the first transistor (B13) and the other terminal of the first transistor (B13).
Claims10
1-2. (canceled)
A load driver comprising:
- a voltage step-up and -down DC/DC converter controller block which controls a voltage step-up and -down DC/DC converter that generates from an input voltage an output voltage and feeds the output voltage to a load,
- wherein the voltage step-up and -down DC/DC converter comprises:
- a first switch of which a first terminal is connected to an application terminal of the input voltage;
- a first diode of which a cathode is connected to a second terminal of the first switch and of which an anode is connected to a ground terminal;
- an inductor of which a first terminal is connected to the second terminal of the first switch;
- a second switch of which a first terminal is connected to a second terminal of the inductor and of which a second terminal is connected to the ground terminal;
- a second diode of which an anode is connected to the second terminal of the inductor and of which a cathode is connected to a first terminal of the load;
- and
- a capacitor of which a first terminal is connected to the application terminal of the input voltage and of which a second terminal is connected to the ground terminal.
A load driver comprising:
- a voltage step-up and -down DC/DC converter controller block which controls a voltage step-up and -down DC/DC converter that generates from an input voltage an output voltage and feeds the output voltage to a load,
- wherein the voltage step-up and -down DC/DC converter comprises:
- a first switch of which a first terminal is connected to an application terminal of the input voltage;
- a first diode of which a cathode is connected to a second terminal of the first switch and of which an anode is connected to a ground terminal;
- an inductor of which a first terminal is connected to the second terminal of the first switch;
- a second switch of which a first terminal is connected to a second terminal of the inductor and of which a second terminal is connected to the ground terminal;
- a second diode of which an anode is connected to the second terminal of the inductor and of which a cathode is connected to a first terminal of the load;
- and
- a ceramic capacitor of which a first terminal is connected to the cathode of the second diode and of which a second terminal is connected to the ground terminal.
A load driver comprising:
- a voltage step-up and -down DC/DC converter controller block which controls a voltage step-up and -down DC/DC converter that generates from an input voltage an output voltage and feeds the output voltage to a load,
- wherein the voltage step-up and -down DC/DC converter comprises:
- a first switch of which a first terminal is connected to an application terminal of the input voltage, an N-channel type field effect transistor being used as the first switch;
- a first diode of which a cathode is connected to a second terminal of the first switch and of which an anode is connected to a ground terminal;
- an inductor of which a first terminal is connected to the second terminal of the first switch;
- a second switch of which a first terminal is connected to a second terminal of the inductor and of which a second terminal is connected to the ground terminal;
- a second diode of which an anode is connected to the second terminal of the inductor and of which a cathode is connected to a first terminal of the load;
- and
- a boot strap circuit which is connected to the cathode of the first diode.
Dependencies are inferred from the claim text.