Isolated Power Supply +5 V to +15 V, 500 mA

Published:2013/3/18 21:19:00 Author:Ecco | Keyword: Isolated Power Supply , +5 V to +15 V, 500 mA | From:SeekIC

The Isolated Power supply +5 V to +15 V, 500 mA diagram represents a single control block, knowing that all are identical. It is truly classic, and is based on the use of common components. The Isolated Power supply +5 V to +15 V, 500 mA circuitdescribed belowis a “modification”that is designedtoaccommodateall the modulesona singlecircuit board. Both terminals J1 and J2 (AC1 and AC1 ‘) is from secondary AC transformer. The AC voltage undergoes a wave rectification through four diodes D1 to D4 connected in a bridge, this voltage then filtered by capacitor C1. Values ​​used in the diagram is 1000UF, may be increased to 2200 uF if the output ripple proved too big for your application. Voltage regulation is entrusted to the LM317 regulator IC, is slightly higher quality than its counterparts 78xx, but especially with the advantage that can be adjusted and able to work well over a wide output range. The capacitor C2 is optional, but it contributes significantly to the reduction of output ripple, therefore it is highly recommended. Two diodes D6 and D7 is also optional and only play a protective role is not always necessary at low currents. he output voltage is determined by the value of two resistors forming a voltage divider between output and ground, and whose midpoint is connected to the pin fitting U1.



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