D365A Datasheet, PDF (11/12 Pages) List of Unclassifed Manufacturers – Electroluminescent Lamp Driver IC

VI. High EL Brightness Through Supply Voltage Doubling
An external voltage boost circuit may be used to increase the voltage supplied to the D365. In the following circuit, the
National Semiconductor LM2661 is used as a positive voltage doubler.
L
pnp transistor
V+
CHF
capacitor
Vin
47uF
1 L+
L- 8
2 BASE VOUT 7
3 CHF
GND 6
4 V+ _D365
E5
1N5817
ON
OFF
EL Lamp
SD
V+
CAP+
OSC
GND
LV
CAP- _{LM 2661}
OUT
47uF
10uF
VII. EL Lamp Brightness Regulation
Regulating the DC supply input voltage to the D365 will result in a constant brightness level from the EL lamp,
regardless of battery voltage. In this example, a Micrel voltage regulator is used.
L
pnp transistor
V+
CHF
capacitor
0.1 _µF
1 L+
L- 8
2 BASE VOUT 7
3 CHF
GND ⁶
4 _{V+ D365}
E5
ON
OFF
EL Lamp
1 GND ^{OUT 4}
E
2 E _MIC5203IN 3
Vbat
11