Cantor Colburn LLP
Control circuit of switching power supply for driving light emitting elements, and light emitting device and electronic apparatus using the same
A control circuit of a switching power supply for supplying a drive voltage to a light emitting element is provided. The control circuit includes a pulse width modulator which generates a pulse signal whose duty ratio is adjusted such that a detection voltage corresponding to an output voltage of the switching power supply is equal to a predetermined reference voltage, a driver which drives a switching element of the switching power supply based on the pulse signal, and a standby control unit which stops driving of the switching element once a predetermined time has passed after a standby signal steps down to a level indicating a standby state, and to shut down the control circuit and a current source.
Rohm Co., Ltd.
H H Y H
H05B H05B Y02B H05B
inventional inventional additional inventional
Hiroki Jung-Nam Min-Ki
Kikuchi In Ahn