D356A Datasheet, PDF (9/12 Pages) List of Unclassifed Manufacturers – Electroluminescent Lamp Driver IC

III. Lamp Frequency Control with an External Clock Signal
An external clock signal may be used to control the EL lamp frequency (LF). This technique allows the designer
flexibility to synchronize the El driver IC with other elements in the application. The output lamp frequency will be the
same frequency as the input clock signal. For example, if a 250Hz input clock signal is used, the resulting lamp
frequency will be 250Hz. The clock signal voltage should not exceed V+.
1 GND
E8
ON
OFF
2 L-
CLF2 7
Lamp Frequency CLK
L
3 VOUT
CLF1 6
150kΩ
1.0V Min
0.2V Max
4 L+
D356
V+ 5
1.0uF
Vbat
EL Lamp
IV. EL Lamp Brightness Regulation
Regulating the DC supply input voltage to the D356A will result in a constant brightness level from the EL lamp,
regardless of battery voltage. In this example, a Micrel voltage regulator is used.
1 GND ^{OUT 4}
E
ON
2E
IN
MIC5203
3
Vbat
OFF
1 GND
E8
2 L-
CLF2 7
CLF
L
3 VOUT CLF1 6
4 L+
V+ 5
D356
EL Lamp
1.0uF
9