MIC4827_05 Datasheet, PDF (4/13 Pages) Micrel Semiconductor – Low Input Voltage, 180VPP Output Voltage, EL Driver

MIC4827
Typical Characteristics
Total Input Current
vs. Input Voltage
60
50
R_SW = 562k
R_EL = 1M
40
30 ^{RSW = 442k}
R = 2M
EL
20
Lamp = 2in²
10
L = 220µH
C_OUT = 0.1µF
R_SW = 332k
D = BAV20WS
0
R = 3.32M
EL
0123456
INPUT VOLTAGE (V)
Output Voltage
vs. Temperature
240
220
200
R_SW = 562k
R_EL = 1M
R_SW = 442k
R_EL = 2M
180
160
140
120 ^RSW ^{= 332k}
100 ^REL ^{= 3.32M}
80
60
40
20
0
-40 -20 0 20
V_IN = 3.0V
Lamp = 2in²
L = 220µH
C_OUT = 0.1µF
D = BAV20WS
40 60 80 100
TEMPERATURE (°C)
Switch Resistance
vs. Input Voltage
7
6
5
4
3
2
1
0
123456
INPUT VOLTAGE (V)
Switching Frequency
vs. Input Voltage
120
100
R_SW = 332k
80
R_SW = 442k
60
R_SW = 562k
40
20
0
123456
INPUT VOLTAGE (V)
MIC4827
Micrel
Total Input Current
vs. Temperature
70
60
R_SW = 562k
R_EL = 1M
50
R_SW = 442k
40
R_EL = 2M
30
20
10 ^{RSW = 332k}
R_EL = 3.32M
0
-40 -20 0 20
V = 3.0V
IN
Lamp = 2in²
L = 220µH
C_OUT = 0.1µF
D = BAV20WS
40 60 80 100
TEMPERATURE (°C)
CS Voltage
vs. Input Voltage
100
90
80
R_SW = 442k
R_EL = 2M
70
R_SW = 562k
60
50 ^{RSW = 332k}
40 ^{REL = 3.32M}
R_EL = 1M
30
Lamp = 2in²
20
L = 220µH
10
C_OUT = 0.1µF
D = BAV20WS
0
0123456
INPUT VOLTAGE (V)
Switching Frequency
vs. Switch Resistor
1000
100
10
1
100
1000
10000
SWITCH RESISTOR (kΩ)
EL Frequency
vs. Input Voltage
400
350
300 R_EL = 1M
250 _{REL = 2M}
200
150
100
50
R_EL = 3.32M
0
123456
INPUT VOLTAGE (V)
4
Output Voltage
vs. Input Voltage
200
180 ^{RSW = 442k}
160 ^{REL = 2M}
140
120
R_SW = 562k
100
R_EL = 1M
80 R_SW = 332k
60 R_EL = 3.32M
40
20
Lamp = 2in2
L = 220µH
C_OUT = 0.1µF
D = BAV20WS
0
0123456
INPUT VOLTAGE (V)
CS Voltage
vs. Temperature
100
90
80 ^RSW ^{= 562k}
70 ^{REL = 1M}
R_SW = 442k
R_EL = 2M
60 _{RSW = 332k}
50 ^{REL = 3.32M}
V_IN = 4.0V
Lamp = 2in²
40
30
-40 -20 0
L = 220µH
C_OUT = 0.1µF
D = BAV20WS
20 40 60 80 100
TEMPERATURE (°C)
10000
EL Frequency
vs. EL Resistor
1000
100
10
0.1
1
10
EL RESISTOR (MΩ)
Switching Frequency
vs. Temperature
120
100
R_SW = 332k
80
R_SW = 442k
60
R_SW = 562k
40
20
V_IN = 3.0V
0
-40 -20 0 20 40 60 80 100
TEMPERATURE (°C)
January 2005