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A V T E C H
E L E C T R O S Y S T E M S
L T D .
N A N O S E C O N D
W A V E F O R M
E L E C T R O N I C S
S I N C E
1 9 7 5
info@avtechpulse.com
Tel: 888-670-8729 (USA & Canada)
BOX 5120, LCD MERIVALE
http://www.avtechpulse.com/
or +1-613-686-6675 (Worldwide)
OTTAWA, CANADA K2C3H5
INSTRUCTIONS
MODEL AVR-EB4-B-NXPB-SOD123W
+0.5A / -1A REVERSE RECOVERY
MEASUREMENT SYSTEM
WITH < 1.5 ns SWITCHING TIME
SERIAL NUMBER:
14258
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Related Manuals for Avtech AVR-EB4-B-NXPB-SOD123W
Summary of Contents for Avtech AVR-EB4-B-NXPB-SOD123W
- Page 1 1 9 7 5 info@avtechpulse.com Tel: 888-670-8729 (USA & Canada) BOX 5120, LCD MERIVALE http://www.avtechpulse.com/ or +1-613-686-6675 (Worldwide) OTTAWA, CANADA K2C3H5 INSTRUCTIONS MODEL AVR-EB4-B-NXPB-SOD123W +0.5A / -1A REVERSE RECOVERY MEASUREMENT SYSTEM WITH < 1.5 ns SWITCHING TIME SERIAL NUMBER: 14258...
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Page 2: Warranty
Avtech product is found to be defective, Avtech shall at its option repair or replace said defective item. This warranty does not apply to units which have been dissembled, modified or subjected to conditions exceeding the applicable specifications or ratings. -
Page 3: Table Of Contents
TABLE OF CONTENTS WARRANTY........................2 TECHNICAL SUPPORT....................2 TABLE OF CONTENTS....................3 INTRODUCTION......................5 MODEL HISTORY........................6 SPECIFICATIONS......................7 REGULATORY NOTES....................8 FCC PART 18.......................... 8 EC DECLARATION OF CONFORMITY..................8 DIRECTIVE 2011/65/EU (RoHS).....................9 DIRECTIVE 2002/96/EC (WEEE)....................9 FIRMWARE LICENSING.......................10 INSTALLATION......................11 VISUAL CHECK........................11 POWER RATINGS........................ 11 CONNECTION TO THE POWER SUPPLY................11 PROTECTION FROM ELECTRIC SHOCK................12 ENVIRONMENTAL CONDITIONS..................13... - Page 4 PCB 228D - OP AMP LEVEL SHIFTING................43 PCB 104H - KEYPAD / DISPLAY BOARD................44 MAIN WIRING........................45 STANDARD TEST JIG WIRING (AVX-TRR-NXPB-SOD123W)...........46 TEST JIG WIRING (AVX-TRR-NXPB-SOD128)..............47 PERFORMANCE CHECK SHEET................48 Manual Reference: /fileserver2/officefiles/instructword/avr-eb/avr-eb4-b-nxpa/AVR-EB4-B-NXPB-SOD123W,ed3.odt. Last modified August 8, 2022. Copyright © 2022 Avtech Electrosystems Ltd, All Rights Reserved.
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Page 5: Introduction
While the provided test jig is intended to be flexible and easy to use, users can also develop their own test jigs easily. The AVR-EB4-B-NXPB-SOD123W may also be provided with different or additional a customized test jigs, to meet particular customer package requirements. -
Page 6: Model History
The AVR-EB4-B-NXPB-SOD123W includes an internal trigger source, but it can also be triggered or gated by an external source. A front-panel pushbutton can also be used to trigger the instrument. The AVR-EB4-B-NXPB-SOD123W features front panel keyboard and adjust knob control of the output pulse parameters along with a four line by 40-character backlit LCD display of the output amplitude, pulse repetition frequency, and delay. -
Page 7: Specifications
SPECIFICATIONS Model AVR-EB4-B-NXPB-SOD123W Recovery type: Reverse recovery Intended application: High-speed rectifiers Basic waveform: A positive pulse interrupted by a negative pulse Pulse polarity: Diode current (approx., -100 mA to -1 A +50 mA to + 500 mA depends on V... -
Page 8: Regulatory Notes
If interference is observed, check that appropriate well-shielded cabling is used on the output connectors. Contact Avtech (info@avtechpulse.com) for advice if you are unsure of the most appropriate cabling. Also, check that your load is adequately shielded. It may be necessary to enclose the load in a metal enclosure. -
Page 9: Directive 2011/65/Eu (Rohs)
< 1000 ppm (0.1% by mass) DIRECTIVE 2002/96/EC (WEEE) European customers who have purchased this equipment directly from Avtech will have completed a “WEEE Responsibility Agreement” form, accepting responsibility for WEEE compliance (as mandated in Directive 2002/96/EC of the European Union and local... -
Page 10: Firmware Licensing
Article 9 of Directive 2002/96/EC. Customers who have purchased Avtech equipment through local representatives should consult with the representative to determine who has responsibility for WEEE compliance. Normally, such responsibilities with lie with the representative, unless other arrangements (under Article 9) have been made. -
Page 11: Installation
INSTALLATION VISUAL CHECK After unpacking the instrument, examine to ensure that it has not been damaged in shipment. Visually inspect all connectors, knobs, liquid crystal displays (LCDs), and the handles. If the instrument has been damaged, file a claim immediately with the company that transported the instrument. -
Page 12: Protection From Electric Shock
4. Keep in mind that all cables, connectors, oscilloscope probes, and loads must have an appropriate voltage rating. 5. Do not attempt any repairs on the instrument, beyond the fuse replacement procedures described in this manual. Contact Avtech technical support (see... -
Page 13: Environmental Conditions
page 2 for contact information) if the instrument requires servicing. Service is to be performed solely by qualified service personnel. ENVIRONMENTAL CONDITIONS This instrument is intended for use under the following conditions: 1. indoor use; 2. altitude up to 2 000 m; 3. -
Page 14: Fuses
FUSES This instrument contains four fuses. All are accessible from the rear-panel. Two protect the AC prime power input, and two protect the internal DC power supplies. The locations of the fuses on the rear panel are shown in the figure below: Fuses #1 and #2 Fuse #4 Fuse #3... -
Page 15: Dc Fuse Replacement
DC FUSE REPLACEMENT The DC fuses may be replaced by inserting the tip of a flat-head screwdriver into the fuse holder slot, and rotating the slot counter-clockwise. The fuse and its carrier will then pop out. FUSE RATINGS The following table lists the required fuses: Recommended Replacement Part Nominal Fuses... -
Page 16: Front Panel Controls
FRONT PANEL CONTROLS 1. POWER Switch . This is the main power switch. When turning the instrument on, there is normally a delay of 10 seconds before anything is shown on the main display, as the internal operating system boots up. 2. - Page 17 5. KEYPAD . Control Name Function MOVE This moves the arrow pointer on the display. CHANGE This is used to enter the submenu, or to select the operating mode, pointed to by the arrow pointer. ×10 If one of the adjustable numeric parameters is displayed, this increases the setting by a factor of ten.
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Page 18: Rear Panel Controls
REAR PANEL CONTROLS GATE TRIG RS-232 CONTROL GPIB Note: some connectors may be in different positions than shown above, depending on the exact combination of options ordered. 1. AC POWER INPUT . An IEC-320 C14 three-pronged recessed male socket is provided on the back panel for AC power connection to the instrument. - Page 19 6. GPIB Connector . A standard GPIB cable can be attached to this connector to allow the instrument to be computer-controlled. See the “Programming Manual for -B Instruments” for more details on GPIB control. 7. RS-232 Connector. A standard serial cable with a 25-pin male connector can be attached to this connector to allow the instrument to be computer-controlled.
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Page 20: Timing Control
TIMING CONTROL BASIC TIMING CONTROL This instrument can be triggered by its own internal clock or by an external TTL trigger signal. In either case, two output channels respond to the trigger: PULSE and SYNC. The PULSE output is a bipolar signal that may either drive a 50 Ohm load, or the test jig described later. -
Page 21: Trigger Modes
The pulse repetition frequency (when in the internal mode) of the output can be varied with front panel controls or via the GPIB or RS-232 computer interfaces. The pulse width and delay settings are shown on the front panel, but they are not adjustable. -
Page 22: Basic Amplitude Control
BASIC AMPLITUDE CONTROL The basic test arrangement for the AVR-EB4-B-NXPB-SOD123W is shown in the figure below. The PULSE output on the instrument mainframe is connected to the PULSE input on the test jig (model AVX-TRR-NXPB-SOD123W, or a customized variant) using the supplied coaxial cables, and the control cable is connected using the supplied DB-9 cable. -
Page 23: Setting The Amplitude Levels
SETTING THE AMPLITUDE LEVELS The amplitude of the positive and negative portions of the PULSE waveform may be set from the front panel of the instrument, or by computer command. These settings are expressed in terms of the voltage present on the test jig input. The positive voltage V ("AMP1"... -
Page 24: Incorrect Orientation
can be measured directly on the test jig (with the test jig disconnected) to determine calibrated relationships, if desired. R is provided by the user, and can be calibrated as required. INCORRECT ORIENTATION The instrument and the DUT will not be damaged if the diode is installed with the incorrect orientation (i.e., with the anode and cathode reversed). -
Page 25: Test Jigs
TEST JIGS ALL TEST JIGS The IN 1, IN 2, OUT, and CONTROL connectors are on the rear of the jig, below the hinges: The IN 1 and IN 2 connectors are interchangeable. Both must be used, to connect to the two OUT connectors on the rear panel of the mainframe. - Page 26 Raise the green lever on the left. This will raise the nylon screw over the DUT area on the right: Using tweezers, position a DUT in the cavity of the raised circuit boards. Slots are provided for tweezer access. The DUT will rest on two spring pins, one contacting each DUT pad:...
- Page 27 The cathode should be on the right. The anode should be on the left. Lower the green lever on the left. This will lower the nylon screw over the DUT area on the right, and gently lock the DUT in place in the cavity: It is possible to use a screwdriver to adjust the positioning of the nylon screw.
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Page 28: Avx-Trr-Nxpb-Sod128
AVX-TRR-NXPB-SOD128 The AVX-TRR-NXPB-SOD128 is mostly identical to the AVX-TRR-NXPB-SOD123W described above, except the dimensions of the DUT cavity are slightly different. It accepts SOD128 packages, rather than SOD123W packages. -
Page 29: Typical Results
TYPICAL RESULTS Obtaining meaningful results with the AVR-EB4-B-NXPB-SOD123W requires care, experience, and an understanding of diode transient behavior and the impact of inductive and capacitive parasitics. To assist the user, typical results are provided below. The user should be able to reliably duplicate these results. - Page 30 2V/div / 5Ω = 400 mA/div. 400 ns/div. The reverse recovery transient is clearly visible now. Zooming in further (with a very- high bandwidth oscilloscope) gives: 50 mV/div × 40 dB / 25Ω = 200 mA/div. 5 ns/div. The t recovery time to 10% of I was measured to be 21 ns.
- Page 31 To verify the < 1.5 ns switching timing, we use different oscilloscope measurements: This waveform shows that the +0.5A to -1A switching time (10%-90%) is ~0.77 ns.
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Page 32: Troubleshooting
TROUBLESHOOTING If you obtain “strange” output waveforms, or unexpected values of t , keep these points in mind: 1) The test jig output must be terminated with 50 Ohms. 2) The two coaxial cables connecting the test jig to the output module should normally be 2 meters in length. -
Page 33: Programming Your Pulse Generator
PROGRAMMING YOUR PULSE GENERATOR KEY PROGRAMMING COMMANDS The “Programming Manual for -B Instruments” describes in detail how to connect the pulse generator to your computer, and the programming commands themselves. A large number of commands are available; however, normally you will only need a few of these. - Page 34 Instruments”. (Note: this manual also includes some commands that are not implemented in this instrument. They can be ignored.) Keyword Parameter Notes OUTPut: :[STATe] <boolean value> :PROTection :TRIPped? [query only] [SOURce]: :FREQuency [:CW | FIXed] <numeric value> [SOURce]: :PULSe :PERiod <numeric value>...
- Page 35 *RST [no query form] *SRE <numeric value> *STB? [query only] *TST? [query only] *WAI [no query form]...
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Page 36: Mechanical Information
There are no user-adjustable internal circuits. For repairs other than fuse replacement, please contact Avtech (info@avtechpulse.com) to arrange for the instrument to be returned to the factory for repair. Service is to be performed solely by qualified service personnel. -
Page 37: Maintenance
MAINTENANCE REGULAR MAINTENANCE This instrument does not require any regular maintenance. On occasion, one or more of the four rear-panel fuses may require replacement. All fuses can be accessed from the rear panel. See the “FUSES” section for details. CLEANING If desired, the interior of the instrument may be cleaned using compressed air to dislodge any accumulated dust. -
Page 38: Wiring Diagrams
WIRING DIAGRAMS WIRING OF AC POWER... -
Page 39: Pcb 158R6 - Low Voltage Power Supply
PCB 158R6 - LOW VOLTAGE POWER SUPPLY... -
Page 40: Pcb 168C - High Voltage Dc Power Supply
PCB 168C - HIGH VOLTAGE DC POWER SUPPLY... -
Page 41: Pcb 201C - Safety Interlock
PCB 201C – SAFETY INTERLOCK... -
Page 42: Pcb 241F - Secondary Pulse Width Or Delay Control
PCB 241F - SECONDARY PULSE WIDTH OR DELAY CONTROL... -
Page 43: Pcb 228D - Op Amp Level Shifting
PCB 228D - OP AMP LEVEL SHIFTING... -
Page 44: Pcb 104H - Keypad / Display Board
PCB 104H - KEYPAD / DISPLAY BOARD... -
Page 45: Main Wiring
MAIN WIRING... -
Page 46: Standard Test Jig Wiring (Avx-Trr-Nxpb-Sod123W)
STANDARD TEST JIG WIRING (AVX-TRR-NXPB-SOD123W) -
Page 47: Test Jig Wiring (Avx-Trr-Nxpb-Sod128)
TEST JIG WIRING (AVX-TRR-NXPB-SOD128) -
Page 48: Performance Check Sheet
PERFORMANCE CHECK SHEET...
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