Driving circuit of light emitting element, light emitting device using the same, and electronic device

A driving circuit of a light emitting element comprising:

• a switching power source configured to supply a driving voltage to a first terminal of the light emitting element to be driven;
• and
• a current driver connected to a second terminal of the light emitting element, the current driver configured to supply a driving current to the light emitting element while a burst dimming pulse is being asserted,
• wherein the switching power source comprises:
• a capacitor in which a potential of one end is fixed;
• an error amplifier configured to supply a current depending on a difference between a detection voltage generated from the second terminal of the light emitting element and a reference voltage to the capacitor;
• a switch installed between an output terminal of the error amplifier and the capacitor and maintained in an ON state while the burst dimming pulse is being asserted;
• a pulse generation unit configured to receive a feedback voltage generated in the capacitor and generate a switching pulse signal having a corresponding duty ratio;
• a driver configured to drive a switching element of the switching power source based on the switching pulse signal;
• and
• a feedback voltage regulator circuit configured to be switched between ON and OFF states based on a pulse width of the burst dimming pulse and supply a current to the capacitor when in an ON state.