Datasheet

DS3882
Dual-Channel Automotive CCFL Controller
_____________________________________________________________________ 5
ACTIVE SUPPLY CURRENT
vs. SUPPLY VOLTAGE
DS3882 toc01
SUPPLY VOLTAGE (V)
SUPPLY CURRENT (mA)
5.205.154.80 4.85 4.90 5.00 5.054.95 5.10
4.5
5.0
5.5
6.0
6.5
7.0
7.5
8.0
4.0
4.75 5.25
DPWM = 10%
DPWM = 50%
DPWM = 100%
SVML< 2V
f
LF:OSC
= 64kHz
GATE Q
C
= 3.5nC
ACTIVE SUPPLY CURRENT
vs. TEMPERATURE
DS3882 toc02
TEMPERATURE (°C)
SUPPLY CURRENT (mA)
32.5
5.7
5.9
6.1
6.3
6.5
6.7
6.9
7.1
7.3
7.5
5.5
-40.0 105
V
CC
= 4.75V
V
CC
= 5.0V
V
CC
= 5.25V
DPWM = 100%
f
LF:OSC
= 64kHz
GATE Q
C
= 3.5nC
INTERNAL FREQUENCY CHANGE
vs. TEMPERATURE
DS3882 toc03
TEMPERATURE (°C)
FREQUENCY CHANGE (%)
32.5
-0.8
-0.6
-0.4
-0.2
0
0.2
0.4
0.6
0.8
1.0
-1.0
-40.0 10
5
DPWM FREQUENCY
LAMP FREQUENCY
TYPICAL OPERATION AT 11V
DS3882 toc04
10μs
5.0V
G
A
10μs
5.0V
G
B
10μs
2.00V LCM
10μs
2.00V OVD
TYPICAL OPERATION AT 13V
DS3882 toc05
10μs
5.0V
G
A
10μs
5.0V
G
B
10μs
2.00V LCM
10μs
2.00V OVD
TYPICAL OPERATION AT 16V
DS3882 toc06
10μs
5.0V
G
A
10μs
5.0V
G
B
10μs
2.00V LCM
10μs
2.00V OVD
TYPICAL STARTUP WITH SVM
DS3882 toc07
2ms
5.0V SVML
2ms
5.0V
G
B
2ms
2.00V LCM
2ms
2.00V OVD
BURST DIMMING AT 150Hz AND 10%
DS3882 toc08
1ms
5.0V
G
A
1ms
5.0V
G
B
1ms
2.00V LCM
1ms
2.00V OVD
BURST DIMMING AT 150Hz AND 50%
DS3882 toc09
1ms
5.0V
G
A
1ms
5.0V
G
B
1ms
2.00V LCM
1ms
2.00V OVD
Typical Operating Characteristics
(V
CC
= 5.0V, T
A
= +25°C, unless otherwise noted.)