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参数资料
| 型号： | LM2576 |
| 厂商： | ON SEMICONDUCTOR |
| 英文描述： | 3.0 A, 15 V, Step-Down Switching Regulator(3.0A,15V,降压型开关稳压器) |
| 中文描述： | 3.0甲，15 V的，降压型开关稳压器（3.0A的，15V的，降压型开关稳压器） |
| 文件页数： | 27/28页 |
| 文件大小： | 275K |
| 代理商： | LM2576 |
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LM2576
http://onsemi.com
8
Figure 15. Typical Test Circuit
D1
MBR360
L1
100
mH
Output
2
4
Feedback
Cout
1000
mF
Cin
100
mF
LM2576
Fixed Output
1
5
3ON/OFF
GN
D
Vin
Load
Vout
D1
MBR360
L1
100
mH
Output
2
4
Feedback
Cout
1000
mF
Cin
100
mF
LM2576
Adjustable
1
5
3ON/OFF
GN
D
Vin
Load
Vout
5,000 V
Fixed Output Voltage Versions
Adjustable Output Voltage Versions
Vout + Vref 1.0 )
R2
R1
R2
+ R1
Vout
V
ref
– 1.0
Where Vref = 1.23 V, R1
between 1.0 k and 5.0 k
R2
R1
Cin
100
mF, 75 V, Aluminium Electrolytic
Cout
1000
mF, 25 V, Aluminium Electrolytic
D1
Schottky, MBR360
L1
100
mH, Pulse Eng. PE92108
R1
2.0 k, 0.1%
R2
6.12 k, 0.1%
7.0 V 40 V
Unregulated
DC Input
7.0 V 40 V
Unregulated
DC Input
PCB LAYOUT GUIDELINES
As in any switching regulator, the layout of the printed
circuit board is very important. Rapidly switching currents
associated with wiring inductance, stray capacitance and
parasitic inductance of the printed circuit board traces can
generate
voltage
transients
which
can
generate
electromagnetic interferences (EMI) and affect the desired
operation. As indicated in the Figure 15, to minimize
inductance and ground loops, the length of the leads
indicated by heavy lines should be kept as short as possible.
For best results, singlepoint grounding (as indicated) or
ground plane construction should be used.
On the other hand, the PCB area connected to the Pin 2
(emitter of the internal switch) of the LM2576 should be
kept to a minimum in order to minimize coupling to sensitive
circuitry.
Another sensitive part of the circuit is the feedback. It is
important to keep the sensitive feedback wiring short. To
assure this, physically locate the programming resistors near
to the regulator, when using the adjustable version of the
LM2576 regulator.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LM2576/D | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Easy Switcher? 3.0 A Step-Down Voltage Regulator |
| LM2576_05 | 制造商:MICREL 制造商全称:Micrel Semiconductor 功能描述:52kHz Simple 3A Buck Regulator |
| LM2576_06 | 制造商:ONSEMI 制造商全称:ON Semiconductor 功能描述:3.0 A, 15 V, Step−Down Switching Regulator |
| LM2576_11 | 制造商:HTC 制造商全称:HTC Korea TAEJIN Technology Co. 功能描述:3A, 52kHz, Step-Down Switching Regulator |
| LM2576_12 | 制造商:MOTOROLA 制造商全称:Motorola, Inc 功能描述:EASY SWITCHERER 3.0 A STEPa??DOWN VOLTAGE REGULATOR |
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