LT1248C Linear Technology, LT1248C Datasheet - Page 11

• Manufacturer Part Number: LT1248C
• Description: Power Factor Controller
• Manufacturer: Linear Technology

TYPICAL
**
*
1M
†
270V
90V
TO
1. COILTRONICS CTX02-12236-1 (TYPE 52 CORE)
2. COILTRONICS CTX02-12295 (MAGNETICS Kool M
SEE START-UP AND SUPPLY VOLTAGE SECTION FOR V
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.
0.01 F
4.7nF
AIR MOVEMENT NEEDED AT POWER LEVEL GREATER THAN 250W.
50k
20k
6A
T
10
11
13
6
8
A
OVP
SS
16V TO 10V
EN/SYNC
V
I
AC
SENSE
PPLICATI
2.6V/2.2V
12 A
0.047 F
0.47 F
V
CC
7.5V
7.9V
FILTER
–
–
+
+
EMI
5V
330k
Information furnished by Linear Technology Corporation is believed to be accurate and reliable.
However, no responsibility is assumed for its use. Linear Technology Corporation makes no represen-
tation that the interconnection of its circuits as described herein will not infringe on existing patent rights.
O
–
+
+
–
–
+
EA
U
VA
OUT
®
CC
77930 CORE)
7
GENERATOR.
2.2V
32k
ONE SHOT
7.5V
V
I
I
200ns
REF
9
A
B
+
–
RUN
M1
V
I
M
REF
=
–
+
200 A
300W, 382V Preregulator
I
R
A
REF
2
4k
0.1 F
I
B
M
7 A
2
OUT
I
M
0.2
R
S
5
4k
4
1nF
Kool M is a registered trademark of Magnetics, Inc.
1000pF
I
–
+
SENSE
CA
0.7V
C
CA
20k
SET
100pF
OUT
+
–
14
3
SYNC
–
+
2
RUN
750 H*
PK
–
+
OSC
12
LIM
15k
R
SET
IRF840
R
R
S
1
Q
GND
MURH860
V
CC
16V
+
= 18V**
56 F
35V
15
1M
1%
20k
1%
V
CC
16
1N5819
GTDR
10
LT1248
1248 TA01
+
†
11
180 F
V
OUT