Load driving device and electrical apparatus
AssigneeRohm Co., Ltd.
InventorRyosuke Kanemitsu
Life of this patent
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Abstract
The load driving device disclosed in the specification includes a controller to generate a first control signal based on an input signal, a first output transistor to supply an output current to a load according to the first control signal, a first dividing circuit to output a first divided voltage by dividing a voltage across a first primary electrode and a second primary electrode of the first output transistor by a first transistor and a second transistor connected in serial, a first voltage generating circuit to output a first reference voltage, and a first comparator to supply a first over current detection signal to the controller based on the first reference voltage and the first divided voltage.
Claims16
A load driving device comprising:
- a controller to generate a first control signal based on an input signal;
- a first output transistor to supply an output current to a load according to the first control signal;
- a first dividing circuit to output a first divided voltage by dividing a voltage across a first primary electrode and a second primary electrode of the first output transistor by a first transistor and a second transistor connected in serial;
- a first voltage generating circuit to output a first reference voltage;
- and
- a first comparator to supply a first over current detection signal to the controller based on the first reference voltage and the first divided voltage.
A load driving device comprising:
- a controller to generate a first control signal based on an input signal;
- a first output transistor to supply an output current to a load according to the first control signal;
- a first dividing circuit to output a first divided voltage by dividing a voltage across a first primary electrode and second primary electrode of the first output transistor by a first transistor and a second transistor connected in serial;
- a first voltage generating circuit to output a first reference voltage;
- a first comparator to supply a first over current detection signal to the controller based on the first reference voltage and the first divided voltage;
- and
- a mask circuit to determine a third over current detection signal provided to the controller, regardless of the first over current detection signal if a first mask signal is effective.
Dependencies are inferred from the claim text.