SP4424DS/16

SP4424 Electroluminescent Lamp Driver

© Copyright 2000 Sipex Corporation

6

Number of coil pulses in lamp cycle =

; 70% duty cycle.

EL1 Output

-EL2 Output

EL1 output; charge steps per half cycle based on # of coil pulses per half cycle.

EL1 Output

-EL2 Output

(typical)

Differential Representation (EL1-EL2).

coil

lamp freq. (2)

Figure 1. EL output voltage in discrete steps at EL1 output

Figure 2. Voltage pulses released from the coil to the EL driver circuitry

Figure 3. EL voltage waveforms from the EL1 and EL2 outputs

Figure 4. EL differential output waveform of the EL1 and EL2 outputs