參數(shù)資料
型號: LT1248IS#PBF
廠商: Linear Technology
文件頁數(shù): 2/12頁
文件大?。?/td> 164K
描述: IC PFC CTRLR AVERAGE CURR 16SOIC
標(biāo)準(zhǔn)包裝: 50
模式: 平均電流
頻率 - 開關(guān): 300kHz
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: 16-SOIC(0.154",3.90mm 寬)
供應(yīng)商設(shè)備封裝: 16-SOIC
包裝: 管件
產(chǎn)品目錄頁面: 1338 (CN2011-ZH PDF)
2
LT1248
A
G
A
U
A
R
BSOLUTE    XI
TI   S
(Note 1)
Supply Voltage ....................................................... 27V
GTDR Current Continuous ..................................... 0.5A
GTDR Output Energy(Per Cycle).............................. 5礘
I
AC
, R
SET
, PK
LIM
 Input Current............................. 20mA
V
SENSE
, EN/SYNC, OVP Input Voltage................... V
MAX
I
SENSE
, M
OUT
 Input Current.................................. ?mA
Operating Junction Temperature Range
LT1248C................................................0癈 to 100癈
LT1248I ........................................... 40癈 to 125癈
Thermal Resistance (Junction-to-Ambient)
N Package .................................................. 100癈/W
S Package................................................... 120癈/W
Storage Temperature Range ..................65癈 to 150癈
Lead Temperature (Soldering, 10 sec)................. 300癈
U
U
PACKAGE/ORDER I FOR  ATIO
ELECTRICAL C
C
HARA TERISTICS
ORDER PART
NUMBER
The q denotes specifications which apply over the full operating tempera-
ture range, otherwise specifications are at T
A
 = 25?/SPAN>C. Maximum operating voltage (V
MAX
) = 25V, V
CC
 = 18V, R
SET
 = 15k to GND,
C
SET
 = 1nF to GND, I
AC
 = 100?/SPAN>A, I
SENSE
 = 0V, CA
OUT
 = 3.5V, VA
OUT
 = 5V, OVP = 7.5V, no load on any outputs, unless otherwise noted.
LT1248CN
LT1248IN
LT1248CS
LT1248IS
T
JMAX
 = 125癈, ?/DIV>
JA
 = 100癈/W (N)
T
JMAX
 = 125癈, ?/DIV>
JA
 = 120癈/W (S)
Consult factory for Military grade parts.
1
2
3
4
5
6
7
8
TOP VIEW
N PACKAGE
16-LEAD PDIP
S PACKAGE
16-LEAD NARROW PLASTIC SO
16
15
14
13
12
11
10
9
GND
PK
LIM
CA
OUT
I
SENSE
M
OUT
I
AC
VA
OUT
OVP
GTDR
V
CC
C
SET
SS
R
SET
V
SENSE
EN/SYNC
V
REF
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 (Inactive)
EN/SYNC = 0V, V
CC
 d V
MAX
q
0.5
1.5
mA
Supply Current, On
11.5V d V
CC
 d V
MAX
, CA
OUT
 = 1V
q
8.5
12.0
mA
V
CC
 Turn-On Threshold (Undervoltage Lockout)
q
15.5
16.5
17.5
V
V
CC
 Turn-Off Threshold
q
9.5
10.5
11.5
V
EN/SYNC Threshold, Rising
q
2.2
2.6
2.85
V
EN/SYNC Threshold Hysteresis
0.40
V
EN/SYNC Input Current
EN/SYNC = 0V
q
5
 1
5
礎(chǔ)
3V d EN/SYNC d 7V
50
 25
50
礎(chǔ)
Voltage Amplifier
Voltage Amp Offset Voltage
VA
OUT
 = 3.5V
q
8
8
mV
Input Bias Current
V
SENSE
 = 0V to 7V
q
25
250
nA
Voltage Gain
70
100
dB
Voltage Amp Unity-Gain Bandwidth
3
MHz
Voltage Amp Output High (Internally Clamped)
q
11.3
13.3
V
Voltage Amp Output Low
q
1.1
2
V
Voltage Amp Short-Circuit Current
VA
OUT
 = 0V
q
5
14
30
mA
SS Current
SS = 2.5V
q
5
12
30
礎(chǔ)
Current Amplifier
Current Amp Offset Voltage
q
?
?
mV
I
SENSE
 Bias Current
q
25
250
nA
Current Amp Voltage Gain
80
110
dB
Current Amp Unity-Gain Bandwidth
3
MHz
Current Amp Output High
q
7.2
8.5
V
Current Amp Output Low
q
1.1
2
V
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