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AE Techron LV 3620 Operator's Manual

Power supply amplifiers
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Operator's Manual
LV 3620
Power Supply Amplifiers
5 0 0 7 4 2 - 1

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Summary of Contents for AE Techron LV 3620

  • Page 1 Operator's Manual LV 3620 Power Supply Amplifiers 5 0 0 7 4 2 - 1...
  • Page 2 AE Techron Inc., 2507 Warren St., Elkhart, Indiana 46516 USA warrants to you, the original commercial purchaser of each new AE Techron product, for a period of 1 year from the date of purchase by the original purchaser (warranty period) that the product is free of defects in materials or workmanship and will meet or exceed all advertised specifications for such a product.
  • Page 3 • Shipped ready to operate from 120 volt ac mains at 50–60 Hz. This manual covers basic operation for AE Techron amplifier model LV 3620. It is written for electronic technicians and engineers that need to incorporate the amplifiers into their systems.

  • Page 4: Table Of Contents

    Contents Section 1: Preinstallation 1.1 Safety conventions ....................1-1 1.2. Features........................1-2 1.3 Specifications ......................1-4 1.3.1 Performance ..................1-4 1.3.2 AC power ..................... 1-4 1.3.3 Input ....................... 1-4 1.3.4 Output....................1-5 1.3.5 Controls ....................1-5 1.3.6 LED Indicators ..................1-5 1.3.7 Protection .....................

  • Page 5: Section 1: Preinstallation

    Section 1: Preinstallation 1.1 Safety conventions Safety should be your primary concern as you use the highly sophisticated AETechron LV3620 amplifier. Note the special hazard alert instructions that appear throughout this manual. DANGER DANGER represents the most severe hazard alert. Extreme bodily harm or imminent death will occur if these guidelines are not followed.

  • Page 6: Features

    1.2. Features The AETechron LV3620 amplifier uses the latest technology and miniaturized design to deliver the highest power and value for its size, weight and price. Techron’s patented grounded bridge ™ output and ODEP protection circuitry combine to provide performance and reliability that surpasses previous conventional amplifier designs.
  • Page 7 O U T P U T 4,611,180 CAUTION: TURN OFF AMPLIFIER I N P U T 4,788,452 BEFORE CHANGING THIS SWITCH! Input Reset Power Ouput connector switches cord jacks Illustration 1-1 LV 3620 Front and Back panels Preinstallation 1–3 LV3620...

  • Page 8: Specifications

    1.3 Specifications 1.3.1 Performance Note: The following applies to 120 Vac units with a 24 ohm load and a voltage gain of 30, unless specified otherwise. Configuration: Dual channel, voltage mode, floating output operation. Voltage gain: 30 or 60, ±0.2%, internally selectable. Bandwidth: dc to >...

  • Page 9: Output

    1.3.4 Output Output connector: Dual binding posts. Output impedance: < 10 mΩ in series with < 2µH Maximum output voltage: 305 volts peak, no load condition. Maximum output current: 7.25 amps peak . Maximum output power: 630 W continuous (into 24 Ω). 1.3.5 Controls Power: A front panel pushbutton used to turn the amplifier on and off.

  • Page 10: Construction

    Weight: Net weight is 56 lbs (25.4 kg); shipping weight is 64 lbs (29.1 kg). Center of gravity is 6 inches (15.2 cm) behind front mounting surface. 19 in (48.3 cm) AE Techron 3.5 in. OVERLOAD 3620 Linear Amplifier POWER...

  • Page 11: Section 2: Installation

    Section 2: Installation 2.1 unpacking Every AE Techron 3620 is carefully inspected and tested prior to leaving the factory. If any damage has occurred to your unit during transit, notify the transportation company immediately. Only you, the consignee, may initiate a claim with the carrier for damage resulting during shipment. AE Techron will be happy to cooperate fully as needed.

  • Page 12: Cooling

    2.3 Cooling Never block the side vents and front air intake of the amplifier. Allow at least 45 cubic feet (1.3 cubic meters) per minute of air flow per amplifier. All empty rack spaces should be covered with blank panels to prevent improper recirculating air flow.
  • Page 13 A good choice for pressurizing air behind a rack cabinet door is to mount a “squirrel cage” blower inside the rack (Option 1 in Illustration 2-2). Mount the blower at the bottom of the rack so it blows outside air into the space between the door and in front of the amplifiers, pressurizing the “chimney”...

  • Page 14: User Interface

    Depress this push-button to turn the amplifier on or off. When turned on, the output is disabled for approximately four seconds to protect your system from start-up transients. Note: To make any changes in this delay, contact AE AE Techron.- 19 in (48.3 cm)

  • Page 15: Rear Panel

    2.4.2 Rear panel Circuit breakers are located on the back panel to protect the power supplies against overload. If a breaker trips, the Overload indicator will turn on (the Enable indicator will remain illuminated). P o w e r c o r d A 12 AWG line cord with a 15-ampere grounded NEMA plug is provided with North American units.

  • Page 16: Making Connections

    Consider the power-handling capacity of your load before connecting it to the amplifier. AE Techron is not liable for damage incurred at any time due to any load being overpowered. The use of load protection fuses is highly recommended (see Section 2.5.3).

  • Page 17: Input Connection

    2.5.1 Input connection The balanced input connector (three–terminal barrier block) has a nominal impedance of 50 kilohms and will accept the line-level output of most devices. A balanced (differential) signal input is recommended wherever possible. Correct input wiring will depend on two factors: •...
  • Page 18 Amplifier Input – Floating Shield connected Input to ground terminal Source 2–wire line cord or battery power Amplifier Input – Shield connected to both Floating negative (–) and ground Input input terminals Source 2–wire line cord or battery power Amplifier Input –...

  • Page 19: Bridge-Mono Operation

    2.5.3 Bridge-mono operation Use the Bridge-Mono mode to drive loads with a combined impedance of 4 ohms or greater. (See Parallel-Mono if the load is less than 4 ohms.) Installing the amplifier in Bridge-Mono mode is different from the other modes and requires special attention.

  • Page 20: Parallel-Monooperation

    2.5.4 Parallel-MonoOperation Configure the LV 3620 in the Parallel-Mono mode to drive loads with a total impedance of less than 4 ohms. (See Bridge-Mono if the load is 4 ohms or greater.) Installing the amplifier in Parallel-Mono mode is very different from the other modes and requires special attention.

  • Page 21: Ac Mains Power Requirements

    (such as a slow-blow fuse). 2.5.5 AC mains power requirements Each AE Techron LV3620 amplifier is furnished with a three-wire ac plug. Use an isolated power receptacle whenever possible with adequate current. North American units are shipped with a 15 amp (12 AWG) line cord. Other units are shipped with an appropriate line cord and plug.
  • Page 22 N o t e s : Installation 2–12 LV3620...

  • Page 23: Section 3: Maintenance

    Periodic Maintenance The only routine maintenance that needs to be performed on the AE Techron LV3620 is to check filters at least very six months to be sure they don’t become clogged with dust.

  • Page 24: Worldwide Service

    Worldwide service Service may be obtained from AE Techron. Transport your unit in original factory package. If you don’t have the original shipping container, contact us and a replacement will be sent promptly. Shipments should be sent by UPS. We will return the unit via UPS ground. You must bear the expense of all taxes, duties and customs fees when transporting the unit.

  • Page 25: Section 4: Principles Of Operation

    Section 4: Principles of operation 4.1 Overview The AE Techron LV 3620 is a two channel, linear power amplifier that incorporates technological advancements such as circuitry that reduces stress on the output stages and performs real-time analog computer simulation of output-transistor conditions.

  • Page 26: About Grounded Bridge Amplifiers

    This produces ideal behavior and results in ultra-low distortion values. Lo NPN Hi NPN Interbase Interbase E in E’ in bias bias Load voltage voltage supply Hi PNP Lo PNP Illustration 4–1 Ground bridge amplifier output stage topology Principles of Operation 4–2 LV 3620...

  • Page 27: Circuit Principles

    A solid state thermal sensor gives the ODEP circuits vital information on the operating temperature of the heat sink on which the output transistors are mounted. Principles of Operation 4–3 LV 3620...

  • Page 28: Bridge-Mono Operation

    4.3.2 Bridge-Mono operation By setting the back panel Dual-Mono switch to Bridge-Mono, LV 3620 is converted to a Bridge-Mono amplifier for higher output voltage. The input signal is applied to the Channel 1 input. The Channel 1 output then feeds the inverting input of the Channel 2 error amp.
  • Page 29 +Vcc Power Output Power Supply Load Voltage Supply Voltage –Vcc Input Signal Illustration 4–2 Output transistor power dissipation +Vcc Parallel – Series – Parallel –Vcc Illustration 4–3 Sections of a variable impedance power supply Principles of Operation 4–5 LV 3620...
  • Page 30 Illustration 4-4 LV 3620 block diagram ONLY ONE CHANNEL SHOWN...

  • Page 31: Index

    Index air flow 2-2 Parallel-Mono operation 4-4 Power indicator 2-4 Power supply 4-4 Power switch 2-4 Balanced input wiring 2-7 Powercord 2-5 Bi-Level power supply 4-4 Principles of operation 4-1 Bridge-Mono operation 4-4 Protection, amplifier 1-5, 4-1 protection circuitry 4-1 Protection, load 2-11 Cooling 1-6, 2-2 Rear panel 2-5...

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