Datasheet

DS3881
Single-Channel Automotive CCFL Controller
_____________________________________________________________________ 5
ACTIVE SUPPLY CURRENT
vs. SUPPLY VOLTAGE
DS3881 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
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
DS3881 toc02
TEMPERATURE (°C)
SUPPLY CURRENT (mA)
32.5
5.5
6.0
6.5
7.0
5.0
-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
DS3881 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
-40.0 105
DPWM FREQUENCY
LAMP FREQUENCY
TYPICAL OPERATION AT 11V
DS3881 toc04
10μs
5.0V
G
A
10μs
5.0V
G
B
10μs
2.00V LCM
10μs
2.00V OVD
TYPICAL OPERATION AT 13V
DS3881 toc05
10μs
5.0V
G
A
10μs
5.0V
G
B
10μs
2.00V LCM
10μs
2.00V OVD
TYPICAL OPERATION AT 16V
DS3881 toc06
10μs
5.0V
G
A
10μs
5.0V
G
B
10μs
2.00V LCM
10μs
2.00V OVD
TYPICAL STARTUP WITH SVM
DS3881 toc07
2ms
5.0V SVML
2ms
5.0V
G
B
2ms
2.00V LCM
2ms
2.00V OVD
BURST DIMMING AT 150Hz AND 10%
DS3881 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%
DS3881 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.)