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參數(shù)資料
| 型號(hào)： | AN904 |
| 廠商： | 意法半導(dǎo)體 |
| 英文描述： | LJT 10C 10#20 PIN RECP |
| 中文描述： | 磁性放大器LPR30控制器 |
| 文件頁(yè)數(shù)： | 1/4頁(yè) |
| 文件大?。?/td> | 60K |
| 代理商： | AN904 |
Proper regulation is important in multiple output power supplies where the individual outputs must be
tightly controlled.
The continuing need for more compact and reliable switching power supplies has aroused renewed in-
terest in a well founded control technique: THE MAGNETIC AMPLIFIER.
THE MAGNETIC AMPLIFIER ( shortly written MAG -AMP ), means higher density, simpler control circuit
and higher running frequency in Switching Power Supply.
The MAG AMP is suitable for controlling individual outputs ranging from a few watts to over 100 watts in
power converters whose frequencies range from 20KHz to several hundred KHz.
Picture 1 shows the best application of the MAG AMP is in the Switched - Mode Power Supplies .
By using such a square - loop core to provide a controllable delay at the leading edge of the pulses at
the secondary of the transformer, one or more outputs can be independently and precisely regulated
without the losses inherent in linear regulators or the complexity of conventional switching regulators. In
cases where the load currents of the subordinate outputs are high ( more than 2 - 3 Amps ), the advan-
tages of the saturable regulators become more significant.
December 1997
AN904
APPLICATION NOTE
MAGNETIC AMPLIFIER WITH LPR30 CONTROLLER
by F. Lentini & T. Sampieri
V+
PWM
DRIVER
CR
MAIN Vout
-
+
+
FEEDBAK
CR
AUXILIAR 1
Vout
-
+
REGULATOR
CR
AUXILIAR 2
Vout
-
REGULATOR
Figure 1. Multiple-Output Switched-Mode Power Supplies.
1/3
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