Datasheet

MAX4990
High-Voltage, ±15kV ESD-Protected
Electroluminescent Lamp Driver
4 _______________________________________________________________________________________
0
6
4
2
8
10
12
14
16
18
20
2.4 3.63.0 4.2 4.8 5.4
TOTAL INPUT CURRENT
vs. SUPPLY VOLTAGE
MAX4990 toc01
SUPPLY VOLTAGE (V)
TOTAL INPUT CURRENT (mA)
0
4
12
8
16
20
-40 10-15 35 60 85
TOTAL INPUT CURRENT
vs. TEMPERATURE
MAX4990 toc02
TEMPERATURE (°C)
TOTAL INPUT CURRENT (mA)
80
60
40
20
0
40 12080 160 200
TOTAL INPUT CURRENT AND
PEAK-TO-PEAK OUTPUT VOLTAGE
vs. BOOST CONVERTER FREQUENCY
MAX4990 toc03
BOOST CONVERTER FREQUENCY (kHz)
TOTAL INPUT CURRENT (mA)
300
225
150
75
0
PEAK-TO-PEAK OUTPUT VOLTAGE (V)
- - - - PEAK-TO-PEAK OUTPUT VOLTAGE
90% DUTY CYCLE
C
CS
= 4.7nF
C
CS
= 2.2nF
C
CS
= 2.2nF
C
CS
= 4.7nF
0
0.2
0.6
0.4
0.8
1.0
2.4 3.63.0 4.2 4.8 5.4
SHUTDOWN CURRENT
vs. SUPPLY VOLTAGE
MAX4990 toc04
SUPPLY VOLTAGE (V)
SHUTDOWN CURRENT (nA)
DIM = EN = 0V
-40 10-15 35 60 85
SHUTDOWN CURRENT
vs. TEMPERATURE
MAX4990 toc05
TEMPERATURE (°C)
SHUTDOWN CURRENT (nA)
10
1
0.1
0.01
100
DIM = EN = 0V
0
100
50
200
150
250
300
2.4 5.4
PEAK-TO-PEAK OUTPUT VOLTAGE
vs. SUPPLY VOLTAGE
MAX4990 toc06
SUPPLY VOLTAGE (V)
PEAK-TO-PEAK OUTPUT VOLTAGE (V)
3.63.0 4.2 4.8
DIM = 1.3V
DIM = 1.0V
DIM = 0.8V
DIM = 0.6V
Typical Operating Characteristics
(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.)
ELECTRICAL CHARACTERISTICS (continued)
(V
DD
= +2.4V to +5.5V, C
LAMP
= 10nF, C
CS
= 3.3nF, L
X
= 220µH (I
SAT
= 170mA, R
S
= 5.5Ω), T
A
= T
MIN
to T
MAX
, unless otherwise
noted. Typical values are at V
DD
= +3.0V and T
A
= +25°C.) (Note 1)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
THERMAL SHUTDOWN
Thermal Shutdown 158 °C
Thermal Shutdown Hysteresis 8°C
Note 1: Specifications at T
A
= -40°C are guaranteed by design and not production.