參數(shù)資料
型號(hào)： LM2575
廠商： ON SEMICONDUCTOR
英文描述： 1.0 A, Adjustable Output Voltage, Step-Down Switching Regulator(1.0A,可調(diào)輸出電壓,降壓型開關(guān)穩(wěn)壓器)
中文描述： 1.0甲，可調(diào)輸出電壓，降壓型開關(guān)穩(wěn)壓器（1.0安培，可調(diào)輸出電壓，降壓型開關(guān)穩(wěn)壓器）
文件頁數(shù)： 23/28頁
文件大小： 363K
代理商： LM2575
LM2575
http://onsemi.com
23
THE LM2575ADJ STEPDOWN VOLTAGE REGULATOR WITH 8.0 V @ 1.0 A OUTPUT POWER
CAPABILITY. TYPICAL APPLICATION WITH THROUGHHOLE PC BOARD LAYOUT
C1
C2
C3
D1
L1
L2
R1
R2
100 F, 50 V, Aluminium Electrolytic
330 F, 16 V, Aluminium Electrolytic
100 F, 16 V, Aluminium Electrolytic
1.0 A, 40 V, Schottky Rectifier, 1N5819
330 H, Tech 39: 77 458 BV, Toroid Core, ThroughHole, Pin 3 = Start, Pin 7 = Finish
25 H, TDK: SFT52501, Toroid Core, ThroughHole
1.8 k
10 k
Figure 38. Schematic Diagram of the 8.0 V @ 1.0 V StepDown Converter Using the LM2575Adj
(An additional LC filter is included to achieve low output ripple voltage)
Figure 39. PC Board Component Side
Figure 40. PC Board Copper Side
V
ref
= 1.23 V
R1 is between 1.0 k and 5.0 k
D1
1N5819
L1
330 H
Output
2
R2
10 k
R1
1.8 k
L2
25 H
Regulated
Output Filtered
V
out2
= 8.0 V @1.0 A
Unregulated
DC Input
C2
330 F
/16 V
C3
100 F
/16 V
C1
100 F
/50 V
LM2575Adj
1
5
3
ON/OFF
GND
+V
in
+V
in
= +10 V to + 40 V
4
Feedback
Regulated
Output Unfiltered
V
out1
= 8.0 V @1.0 A
V
out
V
ref
1
R2
R1
+V
out1
+V
in
GND
in
C1
L1
C2
D1
J1
U1 LM2575
L2
C3
+V
out2
R2 R1
GND
out
NOTE: Not to scale.
NOTE: Not to scale
.
References
National Semiconductor LM2575 Data Sheet and Application Note
National Semiconductor LM2595 Data Sheet and Application Note
Marty Brown “Practical Switching Power Supply Design”, Academic Press, Inc., San Diego 1990
Ray Ridley “High Frequency Magnetics Design”, Ridley Engineering, Inc. 1995
相關(guān)PDF資料
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
LM2575/D 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Easy Switcher? 1.0 A Step-Down Voltage Regulator
LM2575_05 制造商:ONSEMI 制造商全稱:ON Semiconductor 功能描述:1.0 A, Adjustable Output Voltage, Step−Down Switching Regulator
LM2575_06 制造商:TI 制造商全稱:Texas Instruments 功能描述:1-A SIMPLE STEP-DOWN SWITCHING VOLTAGE REGULATOR
LM2575_09 制造商:MICREL 制造商全稱:Micrel Semiconductor 功能描述:52kHz Simple 1A Buck Regulator
LM2575-05IKC 制造商:TI 制造商全稱:Texas Instruments 功能描述:1-A SIMPLE STEP DOWN SWITCHING VOLTAGE REGULATOR
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