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參數(shù)資料
| 型號： | LM2576D2T-12 |
| 廠商： | MOTOROLA INC |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | EASY SWITCHERE⑩ 3.0 A STEP-DOWN VOLTAGE REGULATOR |
| 中文描述： | 3 A SWITCHING REGULATOR, 63 kHz SWITCHING FREQ-MAX, PSSO5 |
| 封裝： | PLASTIC, D2PAK-5 |
| 文件頁數(shù)： | 21/26頁 |
| 文件大?。?/td> | 278K |
| 代理商： | LM2576D2T-12 |
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LM2576
http://onsemi.com
21
Figure 32. Undervoltage Lockout Circuit for
Buck Converter
R2
10 k
Z1
1N5242B
R1
10 k
Q1
2N3904
R3
47 k
V
th
≈
13 V
C
in
100 F
LM2576XX
1
3
5
GN
D
ON/OFF
+V
in
+V
in
NOTE: This picture does not show the complete circuit.
The following formula is used to obtain the peak inductor
current:
where ton
|VO|
Vin
|VO|xfosc
, and fosc
52 kHz.
Ipeak
ILoad(Vin
|VO|)
Vin
Vinx ton
2L1
Under normal continuous inductor current operating
conditions, the worst case occurs when V
in
is minimal.
Figure 33. Undervoltage Lockout Circuit for
BuckBoost Converter
R2
15 k
Z1
1N5242B
R1
15 k
Q1
2N3904
R3
47 k
V
th
≈
13 V
C
in
100 F
LM2576XX
1
3
5
GN
D
ON/OFF
+V
in
+V
in
V
out
NOTE: This picture does not show the complete circuit.
Adjustable Output, LowRipple Power Supply
A 3.0 A output current capability power supply that
features an adjustable output voltage is shown in Figure 34.
This regulator delivers 3.0 A into 1.2 V to 35 V output.
The input voltage ranges from roughly 3.0 V to 40 V. In order
to achieve a 10 or more times reduction of output ripple, an
additional LC filter is included in this circuit.
Figure 34. 1.2 to 35 V Adjustable 3.0 A Power Supply with Low Output Ripple
D1
1N5822
L1
150 H
Output
2
4
Feedback
R2
50 k
R1
1.21 k
L2
20 H
Output
Voltage
1.2 to 35 V @ 3.0 A
Optional Output
Ripple Filter
40 V Max
Unregulated
DC Input
C
out
2200 F
C1
100 F
C
in
100 F
LM2574Adj
1
5
3
ON/OFF
GN
D
+V
in
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| LM2576R | 3.0A, 15V, Step-Down Switching Regulator |
| LM2577S-12 | Pressure Transducer, Series 19 mm, Uncompensated, Pressure Range: 0 psi to 100 psi, Absolute, flush mount, 10 Vdc excitation |
| LM2577N-ADJ | Pressure Transducer, Series 19 mm, Compensated, Pressure Range: 0 psi to 200 psi, Absolute, flush mount with flange, 10 Vdc excitation |
| LM2577N-15 | Pressure Transducer, Series 19 mm, Compensated, Pressure Range: 0 psi to 200 psi, Absolute, flush mount, 10 Vdc excitation |
| LM2577N-12 | SIMPLE SWITCHER Step-Up Voltage Regulator |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LM2576D2T-15 | 制造商:MOTOROLA 制造商全稱:Motorola, Inc 功能描述:EASY SWITCHERE⑩ 3.0 A STEP-DOWN VOLTAGE REGULATOR |
| LM2576D2T-15G | 功能描述:直流/直流開關(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 |
| LM2576D2T-3.3 | 功能描述:直流/直流開關(guān)調(diào)節(jié)器 3.3V 3A Buck PWM RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開關(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 |
| LM2576D2T-3.3G | 功能描述:直流/直流開關(guān)調(diào)節(jié)器 3.3V 3A Buck PWM RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開關(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 |
| LM2576D2T-5 | 制造商:MOTOROLA 制造商全稱:Motorola, Inc 功能描述:Easy Switcher 3.0A Step-Down Voltage Regulator |
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