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LT1248CS Datasheet(PDF) 2 Page - Linear Technology

No. de pieza LT1248CS
Descripción Electrónicos  Power Factor Controller
PDF  12 Pages
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Fabricante Electrónico  LINER [Linear Technology]
Página de inicio  http://www.linear.com
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LT1248CS Datasheet(HTML) 2 Page - Linear Technology

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LT1248
A
G
A
U
A
R
BSOLUTEXI
TI
S
(Note 1)
Supply Voltage ....................................................... 27V
GTDR Current Continuous ..................................... 0.5A
GTDR Output Energy(Per Cycle) .............................. 5
µJ
IAC, RSET, PKLIM Input Current ............................. 20mA
VSENSE, EN/SYNC, OVP Input Voltage................... VMAX
ISENSE, MOUT Input Current .................................. ±5mA
Operating Junction Temperature Range
LT1248C ................................................ 0
°C to 100°C
LT1248I ........................................... – 40
°C to 125°C
Thermal Resistance (Junction-to-Ambient)
N Package .................................................. 100
°C/W
S Package ................................................... 120
°C/W
Storage Temperature Range ..................–65
°C to 150°C
Lead Temperature (Soldering, 10 sec)................. 300
°C
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 TA = 25°C. Maximum operating voltage (VMAX) = 25V, VCC = 18V, RSET = 15k to GND,
CSET = 1nF to GND, IAC = 100µA, ISENSE = 0V, CAOUT = 3.5V, VAOUT = 5V, OVP = 7.5V, no load on any outputs, unless otherwise noted.
LT1248CN
LT1248IN
LT1248CS
LT1248IS
TJMAX = 125°C, θJA = 100°C/W (N)
TJMAX = 125°C, θJA = 120°C/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
PKLIM
CAOUT
ISENSE
MOUT
IAC
VAOUT
OVP
GTDR
VCC
CSET
SS
RSET
VSENSE
EN/SYNC
VREF
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
Overall
Supply Current (VCC in Undervoltage Lockout)
VCC = Lockout Voltage – 0.2V
q
0.25
0.45
mA
Supply Current (Inactive)
EN/SYNC = 0V, VCC ≤ VMAX
q
0.5
1.5
mA
Supply Current, On
11.5V
≤ VCC ≤ VMAX, CAOUT = 1V
q
8.5
12.0
mA
VCC Turn-On Threshold (Undervoltage Lockout)
q
15.5
16.5
17.5
V
VCC 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
µA
3V
≤ EN/SYNC ≤ 7V
– 50
– 25
50
µA
Voltage Amplifier
Voltage Amp Offset Voltage
VAOUT = 3.5V
q
–8
8
mV
Input Bias Current
VSENSE = 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
VAOUT = 0V
q
514
30
mA
SS Current
SS = 2.5V
q
512
30
µA
Current Amplifier
Current Amp Offset Voltage
q
±1
±4mV
ISENSE 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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