HV857 データシートの表示（PDF） - Supertex Inc

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HV857

High Voltage EL Lamp Driver for Low Noise Applications

Supertex Inc 

HV857 Application Note

Typical HV857 Output waveform Before and After Noise Reduction:

The following are actual scope pictures, which show the differential output waveform across the lamp, audible noise, and lamp light output

for circuits 1 and 2.

Circuit 1

Series R=0Ω

100V/div

50mV/div

Differential Output Waveform

across the lamp

Audible Noise

200mV/div

1ms/div

Light Output

100V/div

50mV/div

200mV/div

Series R=65KΩ

Differential Output Waveform

across the lamp

Audible Noise

1ms/div

Light Output

10

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