DS3881E Maxim Integrated Products, DS3881E Datasheet - Page 23

• Manufacturer Part Number: DS3881E
• Description: Single-channel Automotive CCFL Controller
• Manufacturer: Maxim Integrated Products

Table 8. Lamp Current Overdrive Control Register (LCOC) [Shadowed-EEPROM, F7h]
BIT
0
1
2
3
4
5
6
7
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
Single-Channel Automotive CCFL Controller
FACTORY
DEFAULT
0
0
0
0
0
0
0
0
NAME
LCO0
LCO1
LCO2
LCOE
TO0
TO1
TO2
TO3
Lamp Current Overdrive Enable. Logically ORed with the LCO pin.
0 = Lamp operated with nominal current setting.
1 = Lamp overdrive invoked.
____________________________________________________________________
LCO2
TO3
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
0
0
0
0
1
1
1
1
LCO1
TO2
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
AUTOMATIC LAMP CURRENT OVERDRIVE TIMEOUT SELECT
0
0
1
1
0
0
1
1
LCO0
TO1
0
1
0
1
0
1
0
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
LAMP CURRENT OVERDRIVE SELECT
TO0
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
IN LAMP FREQUENCY
SELECTED LAMP CURRENT OVERDRIVE
SELECTED TIMEOUT
FUNCTION
CYCLES
Disabled
10 x 2
11 x 2
12 x 2
13 x 2
14 x 2
15 x 2
Nominal Current + 100.00%
1 x 2
2 x 2
3 x 2
4 x 2
5 x 2
6 x 2
7 x 2
8 x 2
9 x 2
Nominal Current + 12.50%
Nominal Current + 25.00%
Nominal Current + 37.50%
Nominal Current + 50.00%
Nominal Current + 62.50%
Nominal Current + 75.00%
Nominal Current + 87.50%
22
22
22
22
22
22
22
22
22
22
22
22
22
22
22
EXAMPLE TIMEOUT IF
LAMP FREQUENCY IS
11.2 min
12.6 min
14.0 min
15.4 min
16.8 min
18.2 min
19.6 min
21.0 min
1.4 min
2.8 min
4.2 min
5.6 min
7.0 min
8.4 min
9.8 min
50kHz
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23