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General Description
The Durel
®
D355B is part of a family of highly integrated EL
drivers based on Durel’s patented three-port (3P) topology,
which offers built-in EMI shielding. This high efficiency
device is well suited for backlighting most timepieces and
liquid crystal displays for portable electronic applications.
MSOP-8
• High Efficiency • Watches
• Low Voltage Operation • Data Organizers/PDAs
• Small System Footprint • Pagers
• Controlled Current Discharge for Low EMI • LCD and Keypad Backlighting
• Capacitor or External Clock LF Control
Features Applications
Standard Test Circuit
Data Sheet
D355B
Electroluminescent
Lamp Driver IC
D355B
nA E’ = 3.0V
mA E’ = GND
µA E’ = GND
Vpp E’ = GND
Hz CLF = 5.0nF
kHz
Parameter Symbol Minimum Typical Maximum Unit Conditions
(Using Standard Test Circuit at Ta=25 °C unless otherwise specified.)
Lamp Driver Specifications
Standby Current 10 1000
Supply Current I 23 30
Enable Current -10 -35
Output Voltage Vout 110 145 220
Lamp Frequency LF 230 310 390
Inductor Frequency HF 23
1
2
3
4
8
7
6
5
GND
L-
VOUT
L+
E’
CLF2
CLF1
V+
Load B
5.0nF
D355B
3.0 Vdc
0.1µF
1.8mH
(3 Ohms)
E’
OFF
ON
GND
3.0V