參數資料
型號: LT1248IS#PBF
廠商: Linear Technology
文件頁數: 11/12頁
文件大?。?/td> 164K
描述: IC PFC CTRLR AVERAGE CURR 16SOIC
標準包裝: 50
模式: 平均電流
頻率 - 開關: 300kHz
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: 16-SOIC(0.154",3.90mm 寬)
供應商設備封裝: 16-SOIC
包裝: 管件
產品目錄頁面: 1338 (CN2011-ZH PDF)
11
LT1248
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.
300W, 382V Preregulator
Kool M?is a registered trademark of Magnetics, Inc.

+

+
I
M
 = 
I
A
2
I
B
200礎
2
VA
OUT
7.5V
7.9V
12礎
5V
EA
V
REF

+

+

+
2.2V
32k
I
A
I
B
7礎
I
M
7.5V
V
REF

+
V
CC
16V TO 10V
2.6V/2.2V

+
0.7V
OSC
R
R
S
Q
C
SET
R
SET
6
11
10
7
9
5
4
2
1
15
16
12
14
SS
OVP
I
AC
V
SENSE
EN/SYNC
M
OUT
I
SENSE
3
CA
OUT
V
CC
RUN
CA
RUN
16V
GND

+
GTDR
1000pF
SYNC
1N5819
 
4.7nF
1M
20k
0.47礔
0.047礔
330k
0.1礔
1nF
8
0.01礔
13
100pF
PK
LIM
20k
1%
R
REF
4k
V
OUT
180礔
T
90V
TO
270V
EMI
FILTER
+

4k
20k
R
S
0.2&
50k
750礖*
1M
1%
MURH860
V
CC
= 18V**
56礔
35V
10&
15k

+
1248 TA01
IRF840
ONE SHOT
200ns
6A
M1
1. COILTRONICS CTX02-12236-1 (TYPE 52 CORE)
  AIR MOVEMENT NEEDED AT POWER LEVEL GREATER THAN 250W.
2. COILTRONICS CTX02-12295 (MAGNETICS Kool M?/DIV>
?/DIV>
 77930 CORE)
SEE START-UP AND SUPPLY VOLTAGE SECTION FOR V
CC
 GENERATOR.
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.
*
**
 
+
+
A
PPLICATI
TYPICAL
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