Patent ID: 7554272

Claim:
An EL driver circuit comprising: a boost converter; and a full H-bridge coupled to the boost converter; wherein the boost converter is pulse width modulated to generate a gradual increase in voltage to be applied to the full H-bridge circuit to drive an EL lamp; wherein N-channel MOSFETs of the H-bridge are driven such that its slew rate is limited due a Miller capacitance feedback; wherein the boost converter comprises: an output driver coupled to the full H-bridge; an EL frequency block coupled to the output driver; an inductor coupled to an input voltage; a first capacitor coupled to the full H-bridge; a diode coupled to the inductor and the first capacitor; a switching transistor coupled to the inductor; a pulse width modulated switch oscillator coupled to the switching transistor for varying a duty cycle of the switching transistor as a function of the input voltage from a voltage regulation pin; and a regulation circuit coupled to the voltage regulation pin for dictating a rising and falling edge of the EL lamp.