LT1248IS Linear Technology, LT1248IS Datasheet - Page 3

• Manufacturer Part Number: LT1248IS
• Description: IC PFC CTRLR AVERAGE CURR 16SOIC
• Manufacturer: Linear Technology

Specifications of LT1248IS

• Mode: Average Current
• Frequency - Switching: 300kHz
• Current - Startup: 250µA
• Voltage - Supply: 15.5 V ~ 27 V
• Operating Temperature: -40°C ~ 125°C
• Mounting Type: Surface Mount
• Package / Case: 16-SOIC (3.9mm Width)
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

Note 1: Absolute Maximum Ratings are those values beyond which the life
of a device may be impaired
Note 2: Multiplier Gain Constant: K =
ELECTRICAL C
ture range, otherwise specifications are at T
C
PARAMETER
Current Amplifier
Current Amp Short-Circuit Current
Input Range, I
Reference
Reference Output Voltage
V
V
V
V
Current Limit
PK
PK
PK
Multiplier
Multiplier Output Current
Multiplier Output Current Offset
Multiplier Maximum Output Current
Multiplier Gain Constant (Note 2)
I
Oscillator
Oscillator Frequency
C
C
Synchronization Pulse Threshold on EN/SYNC Pin Pulse Low = 3.5V, High = 7V, Width > 200ns
Synchronization Frequency Range
Overvoltage Comparator
Comparator Trip Voltage Ratio (V
Hysteresis
OVP Bias Current
OVP Propagation Delay
Gate Driver
Max GTDR Output Voltage
GTDR Output High
GTDR Output Low (Device Unpowered)
GTDR Output Low (Device Active)
Peak GTDR Current
GTDR Rise and Fall Time
GTDR Max Duty Cycle
AC
SET
REF
REF
REF
REF
SET
SET
LIM
LIM
LIM
Input Resistance
Load Regulation
Line Regulation
Short-Circuit Current
Worst Case
Ramp Peak-to-Peak Amplitude
Ramp Valley Voltage
= 1nF to GND, I
Offset Voltage
Input Current
to GTDR Propagation Delay
SENSE
, M
OUT
AC
= 100 A, I
(Linear Operation)
HARA TERISTICS
TRIP
/ V
SENSE
I
AC
REF
C
(VA
)
= 0V, CA
I
OUT
M
– 2)
A
CONDITIONS
CA
I
– 5mA < I
11.5V < V
V
Load, Line, Temperature
PK
PK
I
R
I
I
R
R
R
OVP = 7.5V
0mA Load, 18V < V
– 200mA Load, 11.5V V
V
200mA Load (Sinking)
10mA Load
10nF from GTDR to GND
1nF from GTDR to GND
= 25 C. Maximum operating voltage (V
REF
AC
AC
AC
REF
CC
AC
SET
SET
SET
2
OUT
OUT
LIM
LIM
= 100 A, R
= 450 A, R
from 50 A to 1mA
= 1M from I
= 0V, 50mA Load (Sinking)
= 0mA, T
= 0V
= 15k, C
= 15k, C
= 15k, C
= – 0.1V
Falling from 50mV to – 50mV
= 0V
= 3.5V, VA
REF
CC
< V
< 0mA
A
SET
SET
SET
SET
SET
The
= 25 C
MAX
AC
= 1000pF
= 1500pF
= 1000pF
= 15k
= 15k, VA
to GND
CC
OUT
denotes specifications which apply over the full operating tempera-
= 5V, OVP = 7.5V, no load on any outputs, unless otherwise noted.
CC
OUT
15V
= 7V, M
OUT
= 0V
MAX
) = 25V, V
V
CC
CC
– 286
– 0.3
7.39
7.32
4.35
1.25
1.04
MIN
– 20
– 15
4.5
1.2
12
15
85
58
12
90
= 18V, R
5
– 3.0
– 0.05
0.035
– 260
7.50
– 50
1.05
0.35
– 50
TYP
400
100
100
7.5
4.7
1.4
5.6
0.9
0.5
0.2
SET
14
28
35
32
68
15
25
96
5
5
2
= 15k to GND,
– 100
– 235
– 250
MAX
– 0.5
7.60
7.68
1.55
1.06
17.5
115
5.0
6.5
1.6
1.5
0.4
30
20
50
15
50
78
1
1
LT1248
UNITS
3
f
NOM
V
kHz
kHz
mA
mV
mV
mA
mV
k
nA
ns
ns
ns
–2
%
V
V
V
A
A
A
A
V
V
V
V
V
V
V
V
V
A