參數(shù)資料
型號(hào)： DS3994
廠商： Maxim Integrated Products, Inc.
英文描述： 4-Channel Cold-Cathode Fluorescent Lamp Controller
中文描述： 4通道冷陰極熒光燈控制器
文件頁(yè)數(shù)： 22/28頁(yè)
文件大?。?/td> 557K
代理商： DS3994
D
4-Channel Cold-Cathode
Fluorescent Lamp Controller
22
____________________________________________________________________
FCh: Control Register 3 (CR3)
BIT
NAME
FUNCTION
0
SLOPE
BRIGHT Analog Dimming Slope Select
0 = Positive Slope
1 = Negative Slope
STRIKE AND LAMP OUT TIMEOUT IN LAMP
FREQUENCY CYCLES
LST1
LST0
LAMP OSCILLATOR =
40kHz TO 80kHz
(LOFS = 0)
LAMP OSCILLATOR =
20kHz TO 40kHz
(LOFS = 1)
EXAMPLE TIME OUT IF
LAMP FREQUENCY IS
25kHz OR 50kHz
0
0
1
1
0
1
0
1
32,768
65,536
98,304
131,072
16,384
32,768
49,152
65,536
0.66 seconds
1.31 seconds
1.97 seconds
2.62 seconds
1
LST0
2
LST1
Note: The strike frequency boost does not affect this timeout.
LAMP STRIKE FREQUENCY BOOST SELECT
SB2
SB1
SB0
LAMP STRIKE
FREQUENCY BOOST
EXAMPLE STRIKE FREQUENCY IF
LAMP FREQUENCY IS 50kHz
3
SB0
0
0
0
0
1
1
1
1
0
0
1
1
0
0
1
1
0
1
0
1
0
1
0
1
0%
14%
23%
33%
46%
60%
78%
100%
50kHz
57kHz
61.5kHz
66.7kHz
73kHz
80kHz
89kHz
100kHz
4
SB1
5
SB2
6
IGO
Invert MOSFET Gate A and Gate B Driver Outputs
0 = Do not invert GA and GB outputs.
1 = Invert GA and GB outputs.
7
LOFS
Lamp Oscillator Frequency Select
0 = 40kHz to 80kHz
1 = 20kHz to 40kHz
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