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UG:305 

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USER GUIDE | UG:305

PI3741-0x-EVAL1 

Cool-Power

®

 ZVS Switching Regulators Buck-Boost

 Evaluation Board

Introduction

1

Bill of Materials 

2

Typical Connections 

4

Vicor PCB Edge 

Connector Description 

5

PAD Numbering 

5

PAD Definitions 

6

PCB Design Files 

7

Contents

Page

Introduction

The PI3741‑0x‑EVAL1 evaluation board demonstrates the features and benefits of the Vicor ZVS 

Buck‑Boost regulator; pre‑configured for either a 24 or 48V output voltage and rated for up to 

150W. Please refer to the corresponding PI3741‑0x‑LGIZ data sheet for all power specifications. The 

PI3741‑0x‑EVAL1 evaluation board is used with the following ZVS buck‑boost products:  

PI3741‑00‑LGIZ, PI3741‑01‑LGIZ.

The evaluation board provides several options for applying input power (VIN and GND) and output load 

(VOUT and GND). The user can solder tab‑style banana jacks or wire, use threaded connectors with 

retaining nuts or solder turret pins for clip‑on connections.

The evaluation board comes with all of the PI3741‑0x‑LGIZ’s features accessible to the user. The 

current‑monitor function (IMON) is set up to monitor the PI3741‑0x‑LGIZ's output current, sensed across 

a 5mΩ resistor. The general purpose amplifier (VDIFF) comes pre‑set with a gain of 2, but can be easily 

reconfigured for differential measurements by adding extra 0603 resistors.

The I/O pins are brought out to the right edge of the evaluation board to allow for easy monitoring 

or for adding additional circuitry. The status of the PGD pin is indicated by a dual‑colored LED; red 

indicating a fault and green indicating no faults. The SYNCO (sync out) and SYNCI (sync in) pins are 

accessible to allow for paralleling or for synchronizing to an external clock. Shorting J5 between IMON 

and VSP on the board will connect the output of IMON to the positive input of the general purpose 

amplifier, allowing for user‑designed signal scaling and conditioning.

A footprint for an external Soft‑Start capacitor (0603) is available to tailor the start‑up profile of the 

converter. The error amplifier’s output (EAO) is brought to a pin and in conjunction with the soft‑start 

pin can be used for paralleling converters. The error amplifier’s input (EAIN) is not directly connected to 

a pin, but connects to the pin EXT_VREF via a 10kΩ series resistor. Applying a DC voltage to this pin will 

allow the user to change the regulated output voltage without changing the feedback network.

The board is designed with an edge connector to facilitate testing at the factory, but this connection 

can also be used for board evaluation. The PCB is 4‑layer FR‑4 170Tg material with 2oz copper per layer, 

ENIG pad finish and a board thickness of 0.062in.

Содержание PI3741-0x-EVAL1

Страница 1: ...but can be easily reconfigured for differential measurements by adding extra 0603 resistors The I O pins are brought out to the right edge of the evaluation board to allow for easy monitoring or for adding additional circuitry The status of the PGD pin is indicated by a dual colored LED red indicating a fault and green indicating no faults The SYNCO sync out and SYNCI sync in pins are accessible t...

Страница 2: ...Ω Resistor 1 0 1W 0603 Rohm MCR03EZPFX1002 1 REA1 14 0kΩ for PI3741 00 Resistor 1 0 1W 0603 Yageo RC0603FR 0714KL 29 1kΩ for PI3741 01 Resistor 1 0 1W 0603 KOA Speer RN73H1JTTD2912F50 1 REA4 1 07kΩ Resistor 1 0 1W 0603 Yageo RC0603FR 071K07L 1 RGP 49 9Ω Resistor 1 0 1W 0603 Rohm MCR03ERTF49R9 1 RIN 0 51Ω Resistor 1 0 25W 1206 Rohm MCR18EZHFLR510 1 RSENSE 0 005Ω Resistor 1 1W 2512 Panasonic ERJ M1W...

Страница 3: ...P R3 DNP R2 DNP R4 ADDR1 ADDR0 VDR IMON JVIN JVOUT VSP VDIFF VSN VSP C6 ISN C13 C14 DNP RIMON RIN ISP Tie VOUT VIN ADDR0 ADDR1 SYNCO VDR DAC VIN_FILT ISN SDA SCL ENABLE EAO VSP VDIFF PGD VSN SYNCI 1 2 3 4 5 6 7 8 P1 P2 P3 P4 SAMTEC LPHS 04 24 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 CN1 SAMTEC LPHS HORZ Edge Conn VSN VDIFF RDIFF1 RDIFF2 REA1 REA4 RGP JGP CEAIN1 DNP EXT_VREF REA3 DNP REA2 DAC...

Страница 4: ...rovides an access point that allows the user to add a small signal in the feedback loop to make Gain Phase measurements The jumper J5 will connect the IMON output signal to the positive input of the general purpose amplifier allowing this signal to be scaled The J6 jumper will disable the converter when connected JVIN is an unpopulated Johnson Jack location that may be used to measure input ripple...

Страница 5: ...Assembly series available from Samtec s website PCB Dimensions n n Recommended PCB layout for LPHS XX XX X VXX XX PCB Layout pdf n n Right angle Socket LPHS XX XX X RTX XX MKT pdf n n Vertical Socket LPHS XX XX X VXX XX MKT pdf PAD Numbering Figure 4 Edge connector details Figure 5 Top component view Figure 6 Bottom view ...

Страница 6: ...ments 3 ENABLE Enable 4 SDA Factory use only 5 SCL Factory use only 9 ADR1 Factory use only 13 DAC External voltage node to adjust regulated output voltage EXT_VREF 14 EAO Error amplifier output 15 VDIFF Differential amplifier output 16 VSN Differential amplifier inverting input 17 VPN Differential amplifier non inverting input 18 SYNCO Sync output pin 19 SYNCI Sync input pin 20 PGD Power good sta...

Страница 7: ...ge 7 Table 4 Design files Product Deisgn File Format Link to Download PI3741 0x EVAL1 ODB PI3741 0x Eval ODB zip PCB Design Files ODB evaluation board design files are available for download on the Vicor website ...

Страница 8: ...d fit for your applications and products and to implement adequate design testing and operating safeguards for your planned application s and use s VICOR PRODUCTS ARE NOT DESIGNED AUTHORIZED OR WARRANTED FOR USE IN LIFE SUPPORT LIFE CRITICAL OR SAFETY CRITICAL SYSTEMS OR EQUIPMENT VICOR PRODUCTS ARE NOT CERTIFIED TO MEET ISO 13485 FOR USE IN MEDICAL EQUIPMENT NOR ISO TS16949 FOR USE IN AUTOMOTIVE ...

Страница 9: ...Mouser Electronics Authorized Distributor Click to View Pricing Inventory Delivery Lifecycle Information Vicor PI3741 00 EVAL1 PI3741 01 EVAL1 ...

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