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參數資料
| 型號： | LT1249IS8#PBF |
| 廠商： | Linear Technology |
| 文件頁數： | 12/12頁 |
| 文件大小： | 197K |
| 描述： | IC PFC CTRLR AVERAGE CURR 8SOIC |
| 標準包裝： | 100 |
| 模式： | 平均電流 |
| 頻率 - 開關： | 100kHz |
| 電流 - 啟動： | 250µA |
| 電源電壓： | 15.5 V ~ 27 V |
| 工作溫度： | -40°C ~ 125°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 8-SOIC（0.154"，3.90mm 寬） |
| 供應商設備封裝： | 8-SOIC |
| 包裝： | 管件 |
| 產品目錄頁面： | 1338 (CN2011-ZH PDF) |
12
LT1249
?LINEAR TECHNOLOGY CORPORATION 1994
sn1249 1249fbs LT/TP 0799 2K REV B " PRINTED IN USA
TYPICAL APPLICATION
+
+
VA
OUT
7.5V
EA
1V
+
M1
+
I
M
=
I
A
2
I
B
200礎
2
32k
I
A
I
B
I
M
16V/10V
g
m
= 1/3k
0.7V
+
OSC
SYNC
R
S
Q
6
5
3
4
2
1
8
MULTIPLIER
I
AC
V
SENSE
M
OUT
7
CA
OUT
V
CC
CA
RUN
RUN
GTDR
16V
35pF
20礎
MAX
250礎
1N5819
4.7nF
1M
0.047礔
0.47礔
330k
10k
44礎
22礎
15礎
100pF
1nF
20k
4k
V
OUT
180礔
90V
TO
270V
EMI
FILTER
+
R
MOUT
4k
R
S
0.2&
750礖*
1M
MURH860
V
CC
GND
1249 TA01
IRF840
6A
10&
7.5V
V
REF
**
1. COILTRONICS CTX02-12236 (TYPE 52 CORE)
AIR MOVEMENT NEEDED AT POWER LEVEL GREATER THAN 250W.
2. COILTRONICS CTX02-12295 (MAGNETICS Kool M?/DIV>
?/DIV>
77930 CORE)
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.
*
**
SEE APPLICATIONS INFORMATION SECTION FOR CIRCUITRY TO SUPPLY POWER TO V
CC
.
+
Kool M?is a registered trademark of Magnetics, Inc.
PART NUMBER
DESCRIPTION
COMMENTS
LT1103
Off-Line Switching Regulator
Universal Off-Line Inputs with Outputs to 100W
LT1248
Full Feature Average Current Mode Power Factor Controller
Provides All Features in 16-Lead Package
LT1508
Power Factor and PWM Controller
Simplified PFC Design
LT1509
Power Factor and PWM Controller
Complete Solution for Universal Off-Line Switching Power Supplies
RELATED PARTS
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
(408) 432-1900
q
FAX: (408) 434-0507
q
www.linear-tech.com
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