參數(shù)資料
型號(hào)： LM2575T-3.3
廠商： MOTOROLA INC
元件分類： 穩(wěn)壓器
英文描述： 3.2 A SWITCHING REGULATOR, 52 kHz SWITCHING FREQ-MAX, PSFM5
封裝： 314D-03
文件頁(yè)數(shù)： 16/28頁(yè)
文件大小： 380K
代理商： LM2575T-3.3
LM2575
23
MOTOROLA ANALOG IC DEVICE DATA
THE LM2575–ADJ STEP–DOWN VOLTAGE REGULATOR WITH 8.0 V @ 1.0 A OUTPUT POWER
CAPABILITY. TYPICAL APPLICATION WITH THROUGH–HOLE PC BOARD LAYOUT
C1
–
100
F, 50 V, Aluminium Electrolytic
C2
–
330
F, 16 V, Aluminium Electrolytic
C3
–
100
F, 16 V, Aluminium Electrolytic
D1
–
1.0 A, 40 V, Schottky Rectifier, 1N5819
L1
–
330
H, Tech 39: 77 458 BV, Toroid Core, Through–Hole, Pin 3 = Start, Pin 7 = Finish
L2
–
25
H, TDK: SFT52501, Toroid Core, Through–Hole
R1
–
1.8 k
R2
–
10 k
Figure 38. Schematic Diagram of the 8.0 V @ 1.0 V Step–Down Converter Using the LM2575–Adj
(An additional LC filter is included to achieve low output ripple voltage)
Figure 39. PC Board Component Side
Figure 40. PC Board Copper Side
Vref = 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
Vout2 = 8.0 V @1.0 A
Unregulated
DC Input
C2
330
F
/16 V
C3
100
F
/16 V
C1
100
F
/50 V
LM2575–Adj
1
5
3ON/OFF
Gnd
+Vin
+Vin = +10 V to + 40 V
4
Feedback
Regulated
Output Unfiltered
Vout1 = 8.0 V @1.0 A
Vout + Vref ) 1 )
R2
R1
+Vout1
+Vin
Gndin
C1
L1
C2
D1
J1
U1 LM2575
L2
C3
+Vout2
R2 R1
Gndout
MOTOROLA
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 “Pratical Switching Power Supply Design”, Academic Press, Inc., San Diego 1990
Ray Ridley “High Frequency Magnetics Design”, Ridley Engineering, Inc. 1995
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
LM2575T33 制造商:Texas Instruments 功能描述:SWITCHING REG 1A 3.3V 2575 TO-220
LM2575T5 制造商:Semtech Corporation 功能描述:Swithed-Mode Power Supply Controller, Voltage Mode Type, Bi-Polar, 5 Pin, Plastic, SIP
LM2575T-5 制造商:MOTOROLA 制造商全稱:Motorola, Inc 功能描述:EASY SWITCHERE⑩ 1.0 A STEP-DOWN VOLTAGE REGULATOR
LM2575T-5.0 功能描述:直流/直流開關(guān)轉(zhuǎn)換器 RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開關(guān)頻率:1.5 MHz 輸出電壓:4.6 V 輸出電流:250 mA 輸出端數(shù)量:2 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT
LM2575T-5.0/LB01 制造商:Texas Instruments 功能描述:
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