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參數(shù)資料
| 型號： | LT1432CN8-3.3 |
| 廠商： | LINEAR TECHNOLOGY CORP |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | RADIATION HARDENED HIGH EFFICIENCY, 5 AMP SWITCHING REGULATORS |
| 中文描述： | SWITCHING CONTROLLER, PDIP8 |
| 封裝： | 0.300 INCH, PLASTIC, DIP-8 |
| 文件頁數(shù)： | 26/28頁 |
| 文件大?。?/td> | 611K |
| 代理商： | LT1432CN8-3.3 |
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26
LT1432
POSITIVE TOU
U
LT1271 operates from a constant 5V supply voltage rather
than the high input voltage.
Output voltage ripple in an inverter can be much higher
than a buck converter because current is delivered to the
output capacitor in high amplitude square waves rather
than a DC level with superimposed tri-wave. C2 is there-
fore somewhat larger than in a buck design. Also C2 must
be rated to handle the large RMS current pulses fed into it.
This RMS current is approximately equal to:
I
V
V
OUT
OUT
IN
For 1A output current, with 5V input, this computes to
1A
RMS
in the output capacitor. A small additional output
filter would reduce output ripple voltage, but it does not
change the current rating requirement for the main output
capacitor. The reader is referred to a switching regulator
CAD program (SwitcherCAD) supplied by LTC for further
insight into converters. It is suggested that the reader fool
the program by asking for a negative input, positive output
design. It will then select the LT1070 family of ICs which
normally are not used in positive to negative converters.
Efficiency calculations will be somewhat in error at higher
input voltages because the program assumes full input
voltage across the IC. Later versions of SwitcherCAD will
have a special section for this particular design.
Figure 25. Positive-to-Negative Converter Efficiency
OUTPUT CURRENT (A)
0
E
80
90
100
0.8
LT1432 F25
70
60
50
0.2
0.4
0.6
1.0
V
IN
= 5V
V
IN
= 10V
V
IN
= 20V
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| LT1432CS8 | 5V High Efficiency Step-Down Switching Regulator Controller |
| LT1432CS8-3.3 | RADIATION HARDENED HIGH EFFICIENCY, 5 AMP SWITCHING REGULATORS |
| LT1457ACN8 | Dual, Precision JFET Input Op Amp |
| LT1457CN8 | Dual, Precision JFET Input Op Amp |
| LT1457S8 | Dual, Precision JFET Input Op Amp |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LT1432CS8 | 制造商:Linear Technology 功能描述: |
| LT1432CS8-3.3 | 制造商:LINER 制造商全稱:Linear Technology 功能描述:3.3V High Efficiency Step-Down Switching Regulator Controller |
| LT1435 | 制造商:LINER 制造商全稱:Linear Technology 功能描述:4.5A, 500kHz Step-Down Switching Regulator |
| LT1436 | 制造商:LINER 制造商全稱:Linear Technology 功能描述:4.5A, 500kHz Step-Down Switching Regulator |
| LT14-3-FP | 制造商:Thomas & Betts 功能描述:LT14-3 FOOD PROCESSING BOX 制造商:Thomas & Betts 功能描述:Fittings Gang Box 0.75inch Female Aluminum |
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