D355B Datasheet, PDF (12/14 Pages) List of Unclassifed Manufacturers – Electroluminescent Lamp Driver IC

XI. High EL Brightness with Parallel D355 Drivers (Option 1)
Two or more D355 EL drivers may be operated in parallel to increase the brightness of the EL lamp by 50-
100%. In this circuit, an external clock signal with a 50% duty cycle is needed to synchronously drive both
D355 ICs. The clock signal voltage should not exceed V+.
1 GND
2 L-
E’ 8
CLF2 7
OFF
ON
L
3 VOUT CLF1 6
150kΩ
4 L+
V+ 5
D355
1 GND
2 L-
E’ 8
CLF2 7
Lamp Frequency CLK
1.0V Min
0.2V Max
L
3 VOUT CLF1 6
150kΩ
4 L+
V+ 5
D355
EL Lamp
1.0µF
Vbat
XII. High EL Brightness with Parallel D355 Drivers (Option 2)
Two or more D355 EL drivers may be operated in parallel to increase the brightness of the EL lamp by 50-
100%. In this circuit, two D355 ICs are operating synchronously using their internal oscillators. The lamp
frequency is controlled by a shared CLF capacitor.
1 GND
E’ 8
2 L-
CLF2 7
L
3 VOUT CLF1 6
4 L+
V+ 5
D355
OFF
ON
1 GND
E’ 8
2 L-
CLF2 7
L
3 VOUT CLF1 6
4 L+
V+ 5
D355
100Ω
100Ω
1.0µF
EL Lamp
CLF
Vbat
13