MAX4990E Ver la hoja de datos (PDF) - Maxim Integrated
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Fabricante
MAX4990E Datasheet PDF : 15 Pages
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High-Voltage, ±15kV ESD-Protected
Electroluminescent Lamp Driver
Typical Operating Characteristics (continued)
(VDD = +3.6V, CLAMP = 10nF, CCS = 3.3nF, LX = 220µH (ISAT = 170mA, RS = 5.5Ω), RSLEW = 390kΩ, DIM = VDD, CSW = 100pF,
CEL = 1.2nF, TA = +25°C, unless otherwise noted.)
BOOST CONVERTER FREQUENCY vs. CSW
160
RSLEW = 390kΩ
BOOST CONVERTER FREQUENCY
vs. SUPPLY VOLTAGE
110
BOOST CONVERTER FREQUENCY
vs. TEMPERATURE
110
120
105
105
80
100
100
40
95
95
0
80
115
150
185
220
CSW (pF)
90
2.4 3.0 3.6 4.2 4.8 5.4
SUPPLY VOLTAGE (V)
90
-40 -15 -10
35
60
85
TEMPERATURE (°C)
OUTPUT VOLTAGE SLOPE vs. RSLEW
40
35
30
25
20
15
10
5
0
300 400 500 600 700 800 900 1000
RSLEW (kΩ)
SLOW TURN-ON/-OFF TIME vs. CDIM
4.0
RDIM = 390kΩ
3.5
3.0
tON
2.5
2.0
1.5
1.0
0.5
0
0
tOFF
0.6 1.2 1.8 2.4 3.0 3.6
CDIM (μF)
OUTPUT VOLTAGE SLOPE
vs. SUPPLY VOLTAGE
32
OUTPUT VOLTAGE SLOPE
vs. TEMPERATURE
32
30
30
28
28
26
26
24
24
22
2.4 3.0 3.6 4.2 4.8 5.4
SUPPLY VOLTAGE (V)
BRIGHTNESS AND TOTAL INPUT CURRENT
vs. SUPPLY VOLTAGE
25
- - - - SUPPLY CURRENT
30 MAX4990E toc23
CLAMP = 20nF
20
26
15
22
10
18
22
-40
-15 10
35
80
85
TEMPERATURE (°C)
TYPICAL VA, VB, AND
VA - VB WAVEFORMS
MAX4990E toc24
VA - VB
100V/div
VA
50V/div
5
14
0
10
2.4 3.0 3.6 4.2 4.8 5.4
SUPPLY VOLTAGE (V)
1ms/div
VB
50V/div
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