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參數(shù)資料
| 型號： | SG3843DM |
| 廠商： | MICROSEMI CORP-ANALOG MIXED SIGNAL GROUP |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | CURRENT MODE PWM CONTROLLER |
| 中文描述： | 1 A SWITCHING CONTROLLER, 500 kHz SWITCHING FREQ-MAX, PDSO8 |
| 封裝： | ROHS COMPLIANT, PLASTIC, SOIC-8 |
| 文件頁數(shù)： | 14/14頁 |
| 文件大小： | 224K |
| 代理商： | SG3843DM |
C
U R R E N T
-M
O D E
PWM C
O N T R O L L E R
SG1842/SG1843 Series
P R O D U C T D A T A B O O K 1 9 9 6 / 1 9 9 7
Copyright 2000
Rev. 1.6 4/00
14
P
R O D U C T I O N
D
A T A
S
H E E T
T Y P I C A L A P P L I C AT I O N C I R C U I T S
(continued)
FIGURE 25.
— OFF-LINE FLYBACK REGULATOR
150k
100pF
V
FB
COMP
V
REF
R
T
/C
T
4700μF
10V
5V
2-5A
ISOLATION
BOUNDARY
0.01pF
400V
1N3613
820pF
2.5k
1
U
27
0.01μF
10μF
20V
1N3613
1k
470pF
0.85
USD 735
TI
220μF
250V
4.7 1W
673-3
AC
INPUT
V
CC
OUT
CUR
SEN
GND
SG1842
20k
3.6k
10k
.0047μF
0.01μF
16V
56k
1W
20k
T1: Coilcraft E - 4140 - b
Primary - 97 turns
single AWG 24
Secondary - 4 turns
4 parallel AWG 22
Control - 9 turns
3 parallel AWG 28
SPECIFICATIONS
Input line voltage:
Input frequency:
Switching frequency:
Output power:
Output voltage:
Output current:
Line regulation:
Load regulation:
Efficiency @ 25 Watts,
V
IN
= 90VAC:
V
= 130VAC:
Output short-circuit current:
90VAC to 130VAC
50 or 60Hz
40KHz ±10%
25W maximum
5V +5%
2 to 5A
0.01%/V
8%/A*
70%
65%
2.5Amp average
* This circuit uses a low-cost feedback scheme in which the DC
voltage developed from the primary-side control winding is
sensed by the SG1842 error amplifier. Load regulation is
therefore dependent on the coupling between secondary
and control windings, and on transformer leakage
inductance.
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| SG3843GAS | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:BiCMOS Green-Mode PWM Controllers |
| SG3843GASZ | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:BiCMOS Green-Mode PWM Controllers |
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