Patent ID: 8497671
Filing Date: 2013-07-30
Classification: H03K

Abstract:
1. 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 series; a first voltage generating circuit to output a first reference voltage, wherein the first voltage generating circuit includes a third transistor and a first constant current source, wherein the first reference voltage is provided from a connection node between the third transistor and the first constant current source, and wherein the controller supplies the first control signal to the first transistor, the second transistor, and the third transistor; 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, wherein the first dividing circuit outputs the first divided voltage from a connection node between the first transistor and the second transistor.