参数资料
| 型号： | DS3984T+ |
| 厂商： | Maxim Integrated |
| 文件页数： | 22/24页 |
| 文件大小： | 0K |
| 描述： | IC CCFL CNTRLR 4CH 32-TQFP |
| 标准包装： | 1 |
| 类型： | CCFL 控制器 |
| 频率： | 40 ~ 80 kHz |
| 电流 - 电源： | 12mA |
| 电源电压： | 4.5 V ~ 5.5 V |
| 工作温度： | -40°C ~ 85°C |
| 封装/外壳： | 32-TQFP |
| 供应商设备封装： | 32-TQFP（7x7） |
| 包装： | 托盘 |
4-Channel Cold-Cathode
Fluorescent Lamp Controller
Table 5. Transformer Specifications
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
Turns Ratio (Secondary/Primary)
(Notes 11, 12, 13)
40
Frequency
Output Power
Output Current
40
5
80
6
8
kHz
W
mA
Primary DCR
Secondary DCR
Primary Leakage
Secondary Leakage
Primary Inductance
Secondary Inductance
Center tap to one end
200
500
12
185
70
500
m Ω
Ω
μH
mH
μH
mH
Center Tap Voltage
Secondary Output Voltage
100ms minimum
Continuous
10.8
2000
1000
12
13.2
V
V RMS
Note 11: Primary should be Bifilar wound with center tap connection.
Note 12: Turns ratio is defined as secondary winding divided by the sum of both primary windings.
Note 13: 40:1 is the nominal turns ratio for driving a 438mm x 2.2mm lamp with a 12V supply. Refer to AN3375 for more information.
Table 6. Resistor and Capacitor Selection Guide
DESIGNATOR
R1
R2
R3
R4
R5
R6
R7
R8
QTY
1
1
1
1
1
1
1
1/Ch
VALUE
10k Ω
12.5k Ω to
105k Ω
20k Ω to
40k Ω
18k Ω to
45k Ω
4.7k Ω
4.7k Ω
4.7k Ω
140 Ω
25°C
TOLERANCE
(%)
1
1
1
1
5
5
5
1
TEMPERATURE
COEFFICIENT
—
—
≤ 153ppm/°C
≤ 153ppm/°C
Any grade
Any grade
Any grade
—
NOTES
—
See the Setting the SVM Threshold Voltage section.
2% or less total tolerance. See the Lamp Frequency
Configuration section to determine value.
2% or less total tolerance. See the Lamp Frequency
Configuration section to determine value.
—
—
—
See the Setting the RMS Lamp Current section.
Capacitor value will also affect LCM bias voltage during
C1
1/Ch
100nF
10
X7R
power-up. A larger capacitor may cause a longer time
for V DCB to reach its normal operating level.
C2
1/Ch
10pF
5
±1000ppm/°C
2kV to 4kV breakdown voltage required.
Capacitor value will also affect LCM bias voltage during
C3
1/Ch
27nF
5
X7R
power-up. A larger capacitor may cause a longer time
for V DCB to reach its normal operating level.
C4
C5
1/Ch
2/DS3984
33μF
0.1μF
20
10
Any grade
X7R
—
Place close to V CC and GND on DS3984.
22
____________________________________________________________________
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相关代理商/技术参数 |
参数描述 |
|---|---|
| DS3984T+ | 功能描述:显示驱动器和控制器 RoHS:否 制造商:Panasonic Electronic Components 工作电源电压:2.7 V to 5.5 V 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:QFN-44 封装:Reel |
| DS3984Z | 制造商:DALLAS 制造商全称:Dallas Semiconductor 功能描述:4-Channel Cold-Cathode Fluorescent Lamp Controller |
| DS3984Z+ | 制造商:DALLAS 制造商全称:Dallas Semiconductor 功能描述:4-Channel Cold-Cathode Fluorescent Lamp Controller |
| DS3988 | 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:8-Channel Cold-Cathode Fluorescent Lamp Controller |
| DS3988T | 功能描述:显示驱动器和控制器 RoHS:否 制造商:Panasonic Electronic Components 工作电源电压:2.7 V to 5.5 V 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:QFN-44 封装:Reel |
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