MosArt
BONDING DIAGRAM
MA88V11B
EL DRIVER
EL
IND
VDD
VSS
OSC
SELF
EN
Chip size : 808um * 665um
Pad size : 90um * 90um
FEATURES
3V battery operation
No external R-C required for oscillation
Two EL driving frequency can be selected
to change the colors of EL lights
3 seconds delay after EN released
OVERVIEW
The MA88V11B is designed for driving EL
on watch’s back light. The operating voltage
is 3V. An inductor is used to generate the high
voltage, and one diode, 2 transistors and a
resistor are necessary. The EL deriving
frequency can be selected for changing the
color of EL lights. MA88V11B can be
selected for normal trigger or delay 3 seconds.
MosArt Semiconductor Corp. Spec.
1
MosArt
PIN DESCRIPTION
MA88V11B
EL DRIVER
Pin
1
2
3
4
5
6
7
Pin name
EL
VDD
OSC
EN
SELF
VSS
IND
Pin description
Output for EL charge
Chip Power positive
Oscillator pin
Enable pin, High enable. (*note1 )
EL driving frequency selection(*note1 )
Chip power ground
Output for EL discharge
*Note1 : Built in pull down resistor
OPERATION DESCRIPTION
1)
EL driving frequency selection
SELF
Floating
1
EL driving frequency
500Hz
1000Hz
Color of EL lights
Green
Blue
2)
Trigger mode
EN
No connect
EN pin connect a capacitor
to VDD
Operation in 3V use 0.1uf capacitor.
Trigger mode
Normal
3 sec. delay
MosArt Semiconductor Corp. Spec.
2
MosArt
APPLICATION CIRCUIT
(1) Operation voltage 3V, normal trigger mode
MA88V11B
EL DRIVER
2mH/48Ω
L1
EL
1N4148
D1
Q1
10K
R1
Q2
EL
IND
VDD
VSS
MA88V11B
OSC
SELF
EN
3V
(2) Operation voltage 3V, delay 3 seconds mode
2mH/48Ω
L1
EL
1N4148
D1
Q1
10K
R1
Q2
EL
IND
VDD
VSS
MA88V11B
0.1uf
OSC
SELF
EN
3V
MosArt Semiconductor Corp. Spec.
4
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