參數(shù)資料
型號(hào)： LM2576TV-005G
廠商： ON SEMICONDUCTOR
元件分類： 穩(wěn)壓器
英文描述： 7.5 A SWITCHING REGULATOR, 63 kHz SWITCHING FREQ-MAX, PZFM5
封裝： TO-220, 5 PIN
文件頁(yè)數(shù)： 27/28頁(yè)
文件大小： 275K
代理商： LM2576TV-005G
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.
相關(guān)PDF資料
PDF描述
LM2576T-015G 7.5 A SWITCHING REGULATOR, 63 kHz SWITCHING FREQ-MAX, PSFM5
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LM2577NADJ 6 A SWITCHING REGULATOR, 62 kHz SWITCHING FREQ-MAX, PDIP24
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LM2576TV-012 功能描述:直流/直流開(kāi)關(guān)調(diào)節(jié)器 12V 3A Buck PWM RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開(kāi)關(guān)頻率:1.5 MHz 輸出電壓:0.5 V to 0.86 V 輸出電流:4 A 輸出端數(shù)量: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5
LM2576TV-012G 功能描述:直流/直流開(kāi)關(guān)調(diào)節(jié)器 12V 3A Buck PWM RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開(kāi)關(guān)頻率:1.5 MHz 輸出電壓:0.5 V to 0.86 V 輸出電流:4 A 輸出端數(shù)量: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5
LM2576TV-015 功能描述:直流/直流開(kāi)關(guān)調(diào)節(jié)器 15V 3A Buck PWM RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開(kāi)關(guān)頻率:1.5 MHz 輸出電壓:0.5 V to 0.86 V 輸出電流:4 A 輸出端數(shù)量: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5
LM2576TV-015G 功能描述:直流/直流開(kāi)關(guān)調(diào)節(jié)器 15V 3A Buck PWM RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開(kāi)關(guān)頻率:1.5 MHz 輸出電壓:0.5 V to 0.86 V 輸出電流:4 A 輸出端數(shù)量: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5
LM2576TV-12 制造商:未知廠家 制造商全稱:未知廠家 功能描述:3.0A, 15V, Step-Down Switching Regulator
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