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LT1249I Datasheet(PDF) 2 Page - Linear Technology

Part # LT1249I
Description  Power Factor Controller
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Manufacturer  LINER [Linear Technology]
Direct Link  http://www.linear.com
Logo LINER - Linear Technology

LT1249I Datasheet(HTML) 2 Page - Linear Technology

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LT1249
ABSOLUTE MAXIMUM RATINGS
PACKAGE/ORDER INFORMATION
Supply Voltage ....................................................... 27V
GTDR Current Continuous ..................................... 0.5A
GTDR Output Energy (Per Cycle) ............................. 5
µJ
IAC Input Current ................................................. 20mA
VSENSE Input Voltage ............................................ VMAX
MOUT Input Current.............................................. ±5mA
Operating Junction Temperature Range
LT1249C ................................................ 0
°C to 100°C
LT1249I ........................................... – 40
°C to 125°C
Thermal Resistance (Junction-to-Ambient)
N8 Package ................................................ 100
°C/W
S8 Package ................................................. 120
°C/W
Storage Temperature Range ..................–65
°C to 150°C
Lead Temperature (Soldering, 10 sec)................. 300
°C
ELECTRICAL CHARACTERISTICS The q denotes specifications which apply over the operating temperature
range, otherwise specifications are at TA = 25°C. Maximum operating voltage (VMAX) = 25V, VCC = 18V, IAC = 100µA, CAOUT = 3.5V,
VAOUT = 5V, no load on any outputs, unless otherwise noted.
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, On
11.5V
≤ VCC ≤ VMAX, CAOUT = 1V
q
812
mA
VCC Turn-On Threshold
q
15.5
16.5
17.5
V
VCC Turn-Off Threshold
q
9.5
10.5
11.5
V
Voltage Amplifier
VSENSE Bias Current
VSENSE = 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
≤ Source Current ≤ 50µA
q
10
12
V
Voltage Amp Output Low
0
≤ Sink Current ≤ 5µA
q
0.1
0.4
V
Voltage Amp Source Current
q
130
260
450
µA
Voltage Amp Sink Current Threshold
Linear Operation, 2V < VAOUT < 10V
q
33
44
57
µA
Voltage Amp Sink Current Hysteresis
2V < VAOUT < 10V
q
14
22.5
30
µA
Current Amplifier
Current Amp Offset Voltage
q
±2
±15
mV
Current Amp Transconductance
∆ICAOUT = ±40µA
q
150
320
550
µmho
Current Amp Voltage Gain
2.5V
≤ VCAOUT ≤ 7.5V
500
1000
V/V
Current Amp Source Current
VMOUT = 1V, IM = 0µV
100
145
220
µA
Current Amp Sink Current
VMOUT = – 0.3V, IM = 0µA
67
95
125
µA
Current Amp Output High
7.4
8.1
V
Current Amp Output Low
1.2
2
V
ORDER PART
NUMBER
TJMAX = 125°C, θJA = 100°C/W (N8)
TJMAX = 125°C, θJA = 120°C/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
CAOUT
MOUT
IAC
GTDR
VCC
VSENSE
VAOUT
S8 PACKAGE
8-LEAD PLASTIC SO
N8 PACKAGE
8-LEAD PDIP


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