LT1249C Linear Technology, LT1249C Datasheet - Page 12

• Manufacturer Part Number: LT1249C
• Description: Power Factor Controller
• Manufacturer: Linear Technology

RELATED PARTS
LT1249
PART NUMBER
LT1103
LT1248
LT1508
LT1509
Kool M is a registered trademark of Magnetics, Inc.
12
TYPICAL
270V
90V
TO
1M
4.7nF
6A
6
4
**
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
[phone] FAX: [phone] www.linear-tech.com
V
I
*
0.047 F
0.47 F
† SEE APPLICATIONS INFORMATION SECTION FOR CIRCUITRY TO SUPPLY POWER TO V
AC
7.5V
SENSE
FILTER
1. COILTRONICS CTX02-12236 (TYPE 52 CORE)
2. COILTRONICS CTX02-12295 (MAGNETICS Kool M
THIS SCHOTTKY DIODE IS TO CLAMP GTDR WHEN MOS SWITCH TURNS OFF.
PARASITIC INDUCTANCE AND GATE CAPACITANCE MAY TURN ON CHIP SUBSTRATE
DIODE AND CAUSE ERRATIC OPERATIONS IF GTDR IS NOT CLAMPED.
EMI
AIR MOVEMENT NEEDED AT POWER LEVEL GREATER THAN 250W.
APPLICATION
DESCRIPTION
Off-Line Switching Regulator
Full Feature Average Current Mode Power Factor Controller
Power Factor and PWM Controller
Power Factor and PWM Controller
+
–
EA
330k
–
+
5
VA
44 A
22 A
OUT
I
I
U
A
B
1V
32k
+
–
M1
MULTIPLIER
I
M
=
200 A
I
®
A
2
77930 CORE)
I
B
15 A
2
750 H*
I
M
3
4k
R
4k
M
g
250 A
MOUT
MAX
m
OUT
+
–
0.2
CA
= 1/3k
R
S
1nF
10k
2
COMMENTS
Universal Off-Line Inputs with Outputs to 100W
Provides All Features in 16-Lead Package
Simplified PFC Design
Complete Solution for Universal Off-Line Switching Power Supplies
16V/10V
0.7V
CA
CC
+
–
OUT
V
.
CC
+
–
IRF840
100pF
SYNC
+
–
–
+
1
MURH860
OSC
GND
RUN
35pF
R
S
20 A
1M
20k
1249fb LT/TP 0799 2K REV B • PRINTED IN USA
Q
LINEAR TECHNOLOGY CORPORATION 1994
7.5V
V
+
REF
RUN
16V
180 F
V
10
OUT
7
†
V
CC
8
1249 TA01
1N5819
GTDR
**