参数资料
| 型号： | LT1786FCS#TR |
| 厂商： | Linear Technology |
| 文件页数： | 2/20页 |
| 文件大小： | 0K |
| 描述： | IC REG SW CCFL SMBUS PROG 16SOIC |
| 标准包装： | 2,500 |
| 应用： | 转换器，CCFL |
| 输入电压： | 4.5 V ~ 30 V |
| 输出数： | 1 |
| 工作温度： | 0°C ~ 70°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 16-SOIC（0.154"，3.90mm 宽） |
| 供应商设备封装： | 16-SOIC |
| 包装： | 带卷 (TR) |
LT1786F
ABSOLUTE
AXI U
RATI GS
PACKAGE/ORDER I FOR ATIO
(Note 1)
V CC ........................................................................... 7V
BAT, Royer, BULB .................................................. 30V
CCFL V SW ............................................................... 60V
Shutdown ................................................................. 6V
I CCFL Input Current .............................................. 10mA
DIO Input Current (Peak, < 100ms).................... 100mA
Digital Inputs .............................. – 0.3V to (V CC + 0.3V)
Digital Outputs ............................ – 0.3V to (V CC + 0.3V)
CCFL PGND 1
I CCFL 2
DIO 3
CCFL V C 4
AGND 5
SHDN 6
SMBSUS 7
TOP VIEW
16 CCFL V SW
15 BULB
14 BAT
13 ROYER
12 V CC
11 I OUT
10 SCL
ORDER PART
NUMBER
LT1786FCS
DAC Output Voltage ..................... – 15V to (V CC + 0.3V)
Junction Temperature (Note 2) ............................ 100 ° C
Operating Ambient Temperature Range ..... 0 ° C to 70 ° C
Storage Temperature Range ................ – 65 ° C to 150 ° C
Lead Temperature (Soldering, 10 sec)................. 300 ° C
ADR 8 9 SDA
S PACKAGE
16-LEAD PLASTIC SO
T JMAX = 100 ° C, θ JA = 100 ° C/W
Consult LTC Marketing for parts specified with wider operating temperature ranges.
ELECTRICAL CHARACTERISTICS The q denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T A = 25 ° C. V CC = SHUTDOWN = SMBSUS = SCL = SDA = 3.3V,
BAT = Royer = BULB = 12V, I CCFL = CCFL V SW = Open, DIO = I OUT = GND, CCFL V C = 0.5V, unless otherwise specified.
SYMBOL
I Q
ISUS
PARAMETER
Supply Current
SMBSUS Supply Current
CONDITIONS
3V ≤ V CC ≤ 6.5V, I OUT = 0 μ A
SMBSUS = 0V or Command Code Bit 7 = 1,
q
q
MIN
TYP
6
40
MAX
9.5
100
UNITS
mA
μ A
CCFL V C = Open (Note 3)
I SHDN
SHUTDOWN Supply Current
SHUTDOWN Input Bias Current
SHUTDOWN Threshold Voltage
SHUTDOWN = 0V, CCFL V C = Open (Note 3)
SHUTDOWN = 0V, CCFL V C = Open
q
q
0.45
150
5
0.85
300
10
1.2
μ A
μ A
V
f
DC(MAX)
Switching Frequency
Maximum Switch Duty Cycle
Measured at CCFL V SW , I SW = 50mA,
I CCFL = 100 μ A, CCFL V C = Open
Measured at CCFL V SW
q
175
160
80
200
200
85
225
240
kHz
kHz
%
q
75
85
%
BV
Switch Breakdown Voltage
Switch Leakage Current
Measured at CCFL V SW
V SW = 12V, Measured at CCFL V SW
V SW = 30V, Measured at CCFL V SW
60
70
20
40
V
μ A
μ A
I CCFL Summing Voltage
? I CCFL Summing Voltage for
? Input Programming Current
CCFL V C Offset Sink Current
3V ≤ V CC ≤ 6.5V
I CCFL = 0 μ A to 100 μ A
CCFL V C = 1.5V, Positive Current Measured into Pin
q
0.425
0.385
–5
0.465
0.465
5
5
0.505
0.555
15
15
V
V
mV
μ A
? CCFL V C Source Current for
? I CCFL Programming Current
CCFL V C to DIO Current Servo Ratio
CCFL V C Low Clamp Voltage
CCFL V C High Clamp Voltage
CCFL V C Switching Threshold
CCFL High-Side Sense Servo Current
I CCFL = 25 μ A, 50 μ A, 75 μ A, 100 μ A,
CCFL V C = 1.5V
DIO = 5mA out of Pin, Measure I(V C ) at CCFL V C = 1.5V
V BAT – V BULB = BULB Protect Servo Voltage
I CCFL = 100 μ A
CCFL V SW DC = 0%
I CCFL = 100 μ A, I(V C ) = 0 μ A at CCFL V C = 1.5V
q
q
q
q
q
q
4.70
94
1.7
0.6
0.93
4.95
99
0.1
2.1
0.95
1.00
5.20
104
0.3
2.4
1.3
1.07
μ A/ μ A
μ A/mA
V
V
V
A
2
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