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| 型号： | DS3882E+T&R/C |
| 厂商： | Maxim Integrated |
| 文件页数： | 29/31页 |
| 文件大小： | 0K |
| 描述： | IC AUTO CCFL CTRLR 2CH 28-TSSOP |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 1,000 |
| 类型： | CCFL 控制器 |
| 频率： | 40 ~ 100 kHz |
| 电流 - 电源： | 12mA |
| 电源电压： | 4.75 V ~ 5.25 V |
| 工作温度： | -40°C ~ 105°C |
| 封装/外壳： | 28-TSSOP（0.173"，4.40mm 宽） |
| 供应商设备封装： | 28-TSSOP |
| 包装： | 带卷 (TR) |
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Dual-Channel Automotive CCFL Controller
Table 10. Transformer Specifications (as Used in the Typical Operating Circuit )
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
Turns Ratio (Secondary/Primary)
(Notes 1, 2, 3)
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
Secondary Output Voltage
Center tap to one end
100ms minimum
Continuous
2000
1000
200
500
12
185
70
500
m Ω
Ω
μH
mH
μH
mH
V RMS
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.
Table 11. Resistor and Capacitor Selection Guide
DESIGNATOR
R5, R6
R3, R4
R9
R10
R1
R2
R11
R7, R8
QTY
1
1
1
1
1
1
1
1/Chan
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
TOLERANCE
(%) AT +25°C
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
C6, C8
1/Chan
100nF
10
X7R
power-up. A larger capacitor may cause a longer time
for V DCB to reach its normal operating level.
C2
1/Chan
10pF
5
±1000ppm/°C
2kV to 4kV breakdown voltage required.
Capacitor value will also affect LCM bias voltage during
C3
1/Chan
27nF
5
X7R
power-up. A larger capacitor may cause a longer time
for V DCB to reach its normal operating level.
C1
C7
1/Chan
2/DS3882
33μF
0.1μF
20
10
Any grade
X7R
—
Place close to V CC and GND on DS3882.
____________________________________________________________________
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