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参数资料
| 型号： | L4990 |
| 厂商： | STMICROELECTRONICS |
| 元件分类： | 稳压器 |
| 英文描述： | 1.5 A SWITCHING REGULATOR, 1000 kHz SWITCHING FREQ-MAX, PDIP16 |
| 封装： | DIP-16 |
| 文件页数： | 8/24页 |
| 文件大小： | 322K |
| 代理商： | L4990 |
Table 3. Components List of the Fig. 30 AC-DC adaptor electric schematic.
Component
Reference
Value
Description
Resistors
R1
1.6k
2%, 1/8W
R2
9.1k
2%, 1/8W
R3, R14
10
5%, 1/8W
R4
360k
2%, 1/8W
R5
27k
2%, 1/8W
R6
200k
2%, 1/8W
R7
4.7
2%, 1/8W
R8, R9
4.7k
2%, 1/8W
R10
5.6k
2%, 1/8W
R11
1
2%, 1/2W, metallic film (low inductance)
R12, R13
24k
2%, 1/2W
R15
330
5%, 1/8W
R16
-
Not used
R17
390
5%,1W, 2 paralleled resistors (not used)
R19
100k
5%, 1W
R20, R21
470k
2%, 1/8W
R22
200
5%, 1/8W
R23
2k
2%, 1/8W
R24
1k
5%, 1/8W
Capacitors
C1
100
F
400V, NCC-SMH or equiv.
C2
330
F
25V, NCC-LXF or equiv., 3 paralleled capacitors
C3
47
F
25V, electrolytic
C4
1
F
10V, electrolytic
C5
1nF
J precision
C6, C15
10nF
C7, C14
330pF
C8
330pF
160V, polypropilene
C9
100nF
C10
220nF
C11
100pF
ceramic
C12
-
Not used
C13
4.7nF
630V
Transformer
T1
380
H
Core: EFD25, Philips, 3F3 ferrite (or equivalent)
Primary: 46 T, litz wire 20 x 0.1, interleaved assembly
Secondary: 6 T, 4 paralleled litz wire 20 x 0.1
Auxiliary: 7 T (evenly spaced),
0.2 mm GAP ~ 0.7mm
Transistors
Q1
STP5NA80
ST, TO220 package
Q2
2N2222
ST (or equivalent)
Diodes
B1
DF04M
GI (or equivalent)
D1
STPS20100CT
ST, Shottky, TO220 package
D2, D3
1N4148
ST (or equivalent)
D4
BYT11-600
ST, F126 package
Fuse
T2A250V
ELU (or equivalent)
NTC
-
Not used (see warning)
L4990 - L4990A
16/24
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相关代理商/技术参数 |
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