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參數(shù)資料
| 型號： | 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 |
| 文件頁數(shù)： | 26/28頁 |
| 文件大?。?/td> | 557K |
| 代理商： | DS3994 |
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D
4-Channel Cold-Cathode
Fluorescent Lamp Controller
26
____________________________________________________________________
Table 5. Transformer Specifications
PARAMETER
CONDITIONS
MIN
TYP
40
MAX
UNITS
Turns Ratio (Secondary/Primary)
Frequency
Output Power
Output Current
Primary DCR
Secondary DCR
Primary Leakage
Secondary Leakage
Primary Inductance
Secondary Inductance
Center Tap Voltage
(Notes 1, 2, 3)
40
80
6
8
kHz
W
mA
m
μH
mH
μH
mH
V
5
Center tap to one end
200
500
12
185
70
500
12
10.8
2000
1000
13.2
100ms minimum
Continuous
Secondary Output Voltage
V
RMS
Table 6. Resistor and Capacitor Selection Guide
DESIGNATOR
QTY
VALUE
TOLERANCE
(%) AT 25
°
C
TEMPERATURE
COEFFICIENT
NOTES
R1
1
10k
12.5k
to
105k
1
—
—
R2
1
1
—
See the
Setting the SVM Threshold Voltage
section.
R3
1
20k
to
40k
1
≤
153ppm/
°
C
2% or less total tolerance. See the
Lamp Frequency
Configuration
section to determine value.
R4
1
18k
to
45k
4.7k
4.7k
4.7k
140
1
≤
153ppm/
°
C
2% or less total tolerance. See the
Lamp Frequency
Configuration
section to determine value.
R5
R6
R7
R8
1
1
1
5
5
5
1
Any grade
Any grade
Any grade
—
—
—
—
See the
Setting the RMS Lamp Current
section.
1/Ch
C1
1/Ch
100nF
10
X7R
C ap aci or val ue w al so affect LC M b as vol ag e d ur ng
p ow er up A l ar g er cap aci or m ay cause a l ong er ti m e
for V
D C B
to r each i s nor m al op er ati ng l evel
C2
1/Ch
10pF
5
±1000ppm/
°
C
2kV to 4kV breakdown voltage required.
C3
1/Ch
27nF
5
X7R
C ap aci or val ue w al so affect LC M b as vol ag e d ur ng
p ow er up A l ar g er cap aci or m ay cause a l ong er ti m e
for V
D C B
to r each i s nor m al op er ati ng l evel
C4
C5
1/Ch
1
33μF
0.1μF
20
10
Any grade
X7R
—
Place close to V
CC
and GND on DS3994.
Note 1:
Primary should be Bifilar wound with center tap connection.
Note 2:
Turns ratio is defined as secondary winding divided by the sum of both primary windings.
Note 3:
40:1 is the nominal turns ratio for driving a 438mm x 2.2mm lamp with a 12V supply. Refer to Application Note 3375 for more
information.
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|---|---|
| DS3994Z+ | 功能描述:顯示驅動器和控制器 4-Ch CCFL Controller RoHS:否 制造商:Panasonic Electronic Components 工作電源電壓:2.7 V to 5.5 V 最大工作溫度: 安裝風格:SMD/SMT 封裝 / 箱體:QFN-44 封裝:Reel |
| DS3994Z+T&R | 制造商:Maxim Integrated Products 功能描述:2ND GEN 4CH CCFL CON SOIC-28 T&R LF - Tape and Reel 制造商:Maxim Integrated Products 功能描述:IC CCFL CNTRLR 4CH 28-SOIC |
| DS3994Z+T&R | 功能描述:顯示驅動器和控制器 4-Ch CCFL Controller RoHS:否 制造商:Panasonic Electronic Components 工作電源電壓:2.7 V to 5.5 V 最大工作溫度: 安裝風格:SMD/SMT 封裝 / 箱體:QFN-44 封裝:Reel |
| DS3994Z+W | 功能描述:顯示驅動器和控制器 4-Ch CCFL Controller RoHS:否 制造商:Panasonic Electronic Components 工作電源電壓:2.7 V to 5.5 V 最大工作溫度: 安裝風格:SMD/SMT 封裝 / 箱體:QFN-44 封裝:Reel |
| DS3CC | 制造商:Thomas & Betts 功能描述:30A,MG,CUP CAP |
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