Elenco Electronics XP-15 Instruction Manual
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Elenco Electronics XP-15 Instruction Manual

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POWER SUPPLY
MODEL XP-15
Instruction Manual
ELENCO
®
Copyright © 2013 by Elenco
®
Electronics, Inc.
REV-A
753020
All rights reserved.
No part of this book shall be reproduced by any means; electronic, photocopying, or otherwise without written permission
from the publisher.

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Summary of Contents for Elenco Electronics XP-15

  • Page 1 POWER SUPPLY MODEL XP-15 Instruction Manual ELENCO ® Copyright © 2013 by Elenco ® Electronics, Inc. REV-A 753020 All rights reserved. No part of this book shall be reproduced by any means; electronic, photocopying, or otherwise without written permission from the publisher.

  • Page 2: Circuit Description

    AC voltage from 110 to 130V will have practically no effect on the output voltage. This is because of the specially designed IC circuit used in the XP-15. Severe overloading or even short circuiting the output will not damage the supply. Special turn-off circuits in the IC sense the overload and turn off the output.
  • Page 3 AC to DC CONVERTER The AC to DC converter consists of Voltage Waveform for Supply diodes D1 and D3 and capacitor C1. A) Transformer Transformer T1 has two secondary Winding AB windings which are 180 degrees out of phase. The AC output of each B) Transformer Winding BC winding is shown in Figure 2A and 2B.
  • Page 4 10 amps. REGULATOR CIRCUIT The regulator circuit in the Model XP-15 Power Supply consists of a LM317 integrated circuit. This IC is specially designed to perform the regulation function. Figure 6 shows a simplified circuit of how the LM317 IC works.
  • Page 5 Transistors Q1 and Q2 form a circuit known as a differential amplifier. Transistor Q1’s base is connected to a stable 1.5V reference voltage. The base of Q2 is connected to the regulator output circuit through a voltage divider network. The collector of transistor Q2 is connected to a current source.

  • Page 6: Schematic Diagram

    SCHEMATIC DIAGRAM...

  • Page 7: Parts List

    PARTS LIST RESISTORS Qty. Symbol Description Part # 150W 5% 1/4W 131500 R1, R4 2.2kW 5% 1/4W 142200 2kW Potentiometer 192421 CAPACITORS Qty. Symbol Description Part # 4.7mF 50V Electrolytic 264747 220mF 16V Electrolytic 282244 470mF 35V Electrolytic 284746 2,200mF 35V Electrolytic 292226 SEMICONDUCTORS Qty.

  • Page 8: Two Year Warranty

    TWO YEAR WARRANTY All Elenco models are guaranteed for two ® full years on all parts and service. For the first 3 months, your power supply is covered at absolutely no charge. For the remaining 21 months, a nominal service charge is required to cover shipping and handling.

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