Datasheet

MAX4990
High-Voltage, ±15kV ESD-Protected
Electroluminescent Lamp Driver
_______________________________________________________________________________________ 5
180
190
185
200
195
205
210
-40 85
PEAK-TO-PEAK OUTPUT VOLTAGE
vs. TEMPERATURE
MAX4990 toc07
TEMPERATURE (
°
C)
PEAK-TO-PEAK OUTPUT VOLTAGE (V)
10-15 35 60
0
100
50
200
150
250
300
0.35 1.30
PEAK-TO-PEAK OUTPUT VOLTAGE
vs. DIM VOLTAGE
MAX4990 toc08
DIM VOLTAGE (V)
PEAK-TO-PEAK OUTPUT VOLTAGE (V)
0.730.54 0.92 1.11
V
DD
= 4.5V
0
100
50
200
150
250
300
20 40 60 80
PEAK-TO-PEAK OUTPUT VOLTAGE
vs. DIM DUTY CYCLE
MAX4990 toc09
DIM DUTY CYCLE (%)
PEAK-TO-PEAK OUTPUT VOLTAGE (V)
f
DIM
= 200kHz
f
DIM
= 1MHz
0
40
20
80
60
100
120
2.4
5.4
RMS OUTPUT VOLTAGE
vs. SUPPLY VOLTAGE
MAX4990 toc10
SUPPLY VOLTAGE (V)
RMS OUTPUT VOLTAGE (V)
3.63.0 4.2 4.8
-1000
-700
-800
-900
-600
-500
-400
-300
-200
-100
0
2.4 3.63.0 4.2
4.8
5.4
AVERAGE OUTPUT VOLTAGE
vs. SUPPLY VOLTAGE
MAX4990 toc11
SUPPLY VOLTAGE (V)
AVERAGE OUTPUT VOLTAGE (mV)
-1000
-700
-800
-900
-600
-500
-400
-300
-200
-100
0
-40 10-15 356085
AVERAGE OUTPUT VOLTAGE
vs. TEMPERATURE
MAX4990 toc12
TEMPERATURE (
°
C)
AVERAGE OUTPUT VOLTAGE (mV)
0
100
300
200
400
500
EL SWITCHING FREQUENCY vs.C
EL
MAX4990 toc13
C
EL
(nF)
EL SWITCHING FREQUENCY (Hz)
0.5 1.51.0 2.0 2.5
R
SLEW
= 390k
Ω
190
185
180
175
170
2.4 3.63.0 4.2 4.8 5.4
EL SWITCHING FREQUENCY
vs. SUPPLY VOLTAGE
MAX4990 toc14
SUPPLY VOLTAGE (V)
EL SWITCHING FREQUENCY (Hz)
190
185
180
175
170
-40 10-15 35 60 85
EL SWITCHING FREQUENCY
vs. TEMPERATURE
MAX4990 toc15
TEMPERATURE (°C)
EL SWITCHING FREQUENCY (Hz)
Typical Operating Characteristics (continued)
(V
DD
= +3.6V, C
LAMP
= 10nF, C
CS
= 3.3nF, L
X
= 220µH (I
SAT
= 170mA, R
S
= 5.5Ω), R
SLEW
= 390kΩ, DIM = V
DD
, C
SW
= 100pF,
C
EL
= 1.2nF, T
A
= +25°C, unless otherwise noted.)