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參數資料
| 型號： | LT1249IS8#PBF |
| 廠商： | Linear Technology |
| 文件頁數： | 2/12頁 |
| 文件大小： | 197K |
| 描述： | IC PFC CTRLR AVERAGE CURR 8SOIC |
| 標準包裝： | 100 |
| 模式： | 平均電流 |
| 頻率 - 開關： | 100kHz |
| 電流 - 啟動： | 250µA |
| 電源電壓： | 15.5 V ~ 27 V |
| 工作溫度： | -40°C ~ 125°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 8-SOIC（0.154"，3.90mm 寬） |
| 供應商設備封裝： | 8-SOIC |
| 包裝： | 管件 |
| 產品目錄頁面： | 1338 (CN2011-ZH PDF) |
2
LT1249
ABSOLUTE MAXIMUM RATINGS
W
W
PACKAGE/ORDER INFORMATION
U
U
Supply Voltage ....................................................... 27V
GTDR Current Continuous ..................................... 0.5A
GTDR Output Energy (Per Cycle)............................. 5礘
I
AC
Input Current ................................................. 20mA
V
SENSE
Input Voltage ............................................ V
MAX
M
OUT
Input Current.............................................. ?mA
Operating Junction Temperature Range
LT1249C................................................0癈 to 100癈
LT1249I ........................................... 40癈 to 125癈
Thermal Resistance (Junction-to-Ambient)
N8 Package ................................................ 100癈/W
S8 Package................................................. 120癈/W
Storage Temperature Range ..................65癈 to 150癈
Lead Temperature (Soldering, 10 sec)................. 300癈
ELECTRICAL CHARACTERISTICS
The q denotes specifications which apply over the operating temperature
range, otherwise specifications are at T
A
= 25?/SPAN>C. Maximum operating voltage (V
MAX
) = 25V, V
CC
= 18V, I
AC
= 100?/SPAN>A, CA
OUT
= 3.5V,
VA
OUT
= 5V, no load on any outputs, unless otherwise noted.
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
Overall
Supply Current (V
CC
in Undervoltage Lockout)
V
CC
= Lockout Voltage 0.2V
q
0.25
0.45
mA
Supply Current, On
11.5V d V
CC
d V
MAX
, CA
OUT
= 1V
q
9
12
mA
V
CC
Turn-On Threshold
q
15.5
16.5
17.5
V
V
CC
Turn-Off Threshold
q
9.5
10.5
11.5
V
Voltage Amplifier
V
SENSE
Bias Current
V
SENSE
= 0V to 7V
q
25
250
nA
Voltage Amp Gain
70
100
dB
Voltage Amp Unity-Gain Bandwidth
1.5
MHz
Voltage Amp Output High
0 d Source Current d 50礎
q
10
12
V
Voltage Amp Output Low
0 d Sink Current d 5礎
q
0.1
0.4
V
Voltage Amp Source Current
q
130
260
450
礎
Voltage Amp Sink Current Threshold
Linear Operation, 2V < VA
OUT
< 10V
q
33
44
57
礎
Voltage Amp Sink Current Hysteresis
2V < VA
OUT
< 10V
q
14
22.5
30
礎
Current Amplifier
Current Amp Offset Voltage
q
?
?5
mV
Current Amp Transconductance
I
CAOUT
= ?0礎
q
150
320
550
祄ho
Current Amp Voltage Gain
2.5V d V
CAOUT
d 7.5V
500
1000
V/V
Current Amp Source Current
V
MOUT
= 1V, I
M
= 0礎
100
145
220
礎
Current Amp Sink Current
V
MOUT
= 0.3V, I
M
= 0礎
67
95
125
礎
Current Amp Output High
7.4
8.1
V
Current Amp Output Low
1.2
2
V
ORDER PART
NUMBER
T
JMAX
= 125癈, ?/DIV>
JA
= 100癈/W (N8)
T
JMAX
= 125癈, ?/DIV>
JA
= 120癈/W (S8)
Consult factory for Military grade parts.
LT1249CN8
LT1249IN8
LT1249CS8
LT1249IS8
S8 PART
MARKING
1249
1249I
1
2
3
4
8
7
6
5
TOP VIEW
GND
CA
OUT
M
OUT
I
AC
GTDR
V
CC
V
SENSE
VA
OUT
S8 PACKAGE
8-LEAD PLASTIC SO
N8 PACKAGE
8-LEAD PDIP
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