VICOR PI3741-0x-EVAL1 User Manual

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USER GUIDE | UG:305

PI3741-0x-EVAL1

Cool-Power®

Contents Page

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

ZVS Switching Regulators Buck-Boost Evaluation Board

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.

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Bill of Materials

Table 1

Bill of materials

populated components

Qty

1 CCOMP 4.7nF

1 D1 Fault Status

2 FT1, FT2 TEST 1, TEST 2 SM Testpoint Keystone 5015

2 J5, J6 0.1in Header Jumper Samtec TSW‑148‑07‑F‑S

1 L1 65nH

1 LMAG 0.9µH HCV1206 I nduc t or Cooper HCV1206‑R90‑R

1 PCB

1 PI 3741 ZVS Buck‑Boost

1 R5 1.00k Ω

1 RE A1

1 REA4 1.07k Ω

1 RGP 49.9Ω

1 RIN 0.51Ω

1 RSENSE 0.005Ω

3 RSDA, RSCL, RZ1 0Ω

1 U1 NC7WZ14E P6X

1 CVDR 0.1µ F

Reference

Designator

C1, C2, C3, C4, C5,

C7, C8, C9, C10, C11,

C12, C13, C14, CIN1

RDIFF1, RDIFF2,

REA3, RPGD, RSYNCI

Value Description Manufacturer

2.2µF

10.0 kΩ

14.0kΩ for PI 3741‑ 0 0

29.1kΩ for PI 3741‑ 01

Ceramic Cap, X7S,

100V, 12 0 6

Ceramic Cap, X7R,

50 V, 0603

1 x 1mm Dual Color

SM LED

FP0404 Series

Inductor

PI37xx‑xx

Edge Connector

Eval Board

Low Voltage ZVS

B‑B SIP 10 x 14mm

Resistor, 1%,

0.1W, 0603

Resistor, 1%,

0.1W, 0603

Resistor, 1%,

0.1W, 0603

Resistor, 1%,

0.1W, 0603

Resistor, 1%,

0.1W, 0603

Resistor, 1%,

0.1W, 0603

Resistor, 1%,

0.25W, 1206 Resistor, 1%,

1W, 2512

Resistor, 1%,

0.1W, 0603

Dual Schmidt

trigger Inverter

Capacitor, X7R Ceramic, 0.1µF,

50 V, 0603

TDK C3216 X7S2A2 25K160AB

Murata GRM188R71H472K A01D

Rohm SML‑P24MUWT86

Cooper FP0404R1‑R065‑R

VI COR PC B0175r D

VI COR PI3741‑ 0 x‑LG I Z

Rohm MCR03EZPFX1001

Rohm MCR03EZPFX1002

Yageo RC0603FR‑0714KL

KOA Speer R N73 H1JTTD2912F5 0

Yageo RC0603FR‑ 071K07L

Rohm MCR03ERTF49R9

Rohm MCR18EZHFLR510

Panasonic ERJ‑M1WSF5M0 U

Rohm MCR03EZPJ000

Fairchild NC7WZ14EP 6X

Rohm MCH185CN104 KK

Manufacturer

Part Number

Table 2

Non-populated components

Non-Populated Components

Qty Reference Designator Description

3 REA2, RIMON, RZ2 Resistor, 1%, 0.1W, 0603

4 R1, R2, R3, R4 Factory Use Only

3 CEAIN1, CEAO, CTRK Ceramic Cap, 50V, 0603

1 CIN2 Bi‑Polar Capacitor, Nichicon UPW2A330MPD or equivalent

2 JVIN, JVOUT Johnson Jack, Tektronix 131503100

3 ENABLE, FT3, FT4 SM Test point, Keystone 5015

1 JGP 0.1in Header Jumper

1 C6 Capacitor, Ceramic, 1206

1 H1 Factory Test Header

EAO, EXT_VREF, PGD, IMON,

SGND1, SGND2, SS/TRK, SYNCI, SYNCO,

VDIFF, VDR, VIN, VSN, VSP

Thru‑hole test points, Vector K24C

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PCBNumbe

Figure 1

Evaluation board schematic

ADDR0ADDR1

SYNCO

DAC

EAO

VDIFF

VDR

VIN_FILT

ISN

VSP

PGD

VSN

SYNCI

LMAG

+VO SENSE

+ VO SENSE 1

Tie

JVOUT

VS2

MECH PIN

HCV1206-R

VS1

RSENSE

Tie

C13 C14

C11 C12

C10

C7 C8 C9

K13

K14

H14

J14

G14

VOUT

VS2

K11

VS2

K10

PI3741

VS1

VIN

VIN_FILT

VOUT

VIN

-VO SENSE

-VO SENSE 1

DNP

JGP

CEAIN1

DNP

IMON

REA2

ISP

EAIN

IMON

ISN

A12

E14

A14

D14

IS-

IS+

EAIN

IMON

PGND

SYNCI

PGND

SDA

SYNCOC1SCL

DNP

SGND1

SGND2

SGNDENABLE

SGND

EXT_VREF

REA4

IMON

LGH

EAO

COMP

TRK

SGND

A13

B14

CVDR

VSP

Jumper J5 to connect IMON to VP for ATE Tesng.

VDIFF

DNP

RIMON

EAO

CEAO

COMP

CTRK

TRK

RGP

DAC

DNP

REA3

REA1

VDIFF

VSN

VSP

A10

A11

VSP

VSN

VDIFF

VDR

ADDR0

PGD

ADDR1

RPGD

13141516171819

CN1

1234567

P3 P4

P1 P2

SCL

VOUT VIN

RDIFF1

RZ2

RSYNCI

SDA

ENABLE

VSN

RDIFF2

DNP

RZ1

CCOMP

202122

SAMTEC LPHS-04-24

VSP

EAO

TRK

SAMTEC LPHS HORZ Edge Conn

Fiducials

VIN_F

ADDR0

C3 C4

JVIN

C1 C2

FP0404R1

RIN

DNP

CIN2

VIN VOUT

VSUPPLY

CIN1

SCL

SDA

SYNCO

SYNCI

SCL

SDA

SYNCO

SYNCI

VDR

PGND

PG SENSE

VDR

ENABLE

SGND

VDR

Factory Test Header

DNP

ADDR1

ADDRO/FT2

ADDR1/FT1

ADDR1

ADDR0

PGD

DNP

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PCB0203

RSCLRSDA

TOP VIEW

DUAL LED ORIENTATION

D1A

D1B

PCBNumber

NC7WZ14

VCC

VDR

PGD

GND

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Figure 2

Evaluation board details

Figure 3

Typical input and

output connections

Typical Connections

Figure 4 illustrates the typical input supply and output load connections required to power the PI3741‑x0 evaluation board. The test points on the right side of the board provide access to key nodes used to assess the board's performance. The jumper "JGP" provides 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 voltage.

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Figure 4

Edge connector details

Vicor PCB Edge Connector Description

SAMTEC Reference Mechanical Drawings: based on EXTreme LPHPower™ Socket Assembly series, available from Samtec’s website PCB Dimensions:

 Recommended PCB layout for LPHS‑XX‑XX‑X‑VXX‑XX PCB Layout.pdf

 Right‑angle Socket: LPHS‑XX‑XX‑X‑RTX‑XX‑MKT.pdf

 Vertical Socket: LPHS‑XX‑XX‑X‑VXX‑XX‑MKT.pdf

Figure 5

Top (component) view

Figure 6

Bottom view

PAD Numbering

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Figure 7

Schematic of edge connector

Schematic Symbol

Table 3

PAD Deﬁnitions

PAD Name Descirption

P1,P2 PGND Power ground connection for the input supply and output load

P3 VOUT Output voltage connection

P4 VIN Input voltage connection

1, 2, 6, 7, 8, 10 SGND Signal ground used as reference for I/O measurements

11, 12 PGND Power ground used as reference for input and output voltage measurements

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 status pin

21 ADR0 Factory use only

22 VDR Internal generated 5.1V supply for gate drivers and internal logic

23 ISN Remote‑sensed output voltage, after the IMON resistor

24 VIN Input supply voltage measured at SiP’s input

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PCB Design Files

ODB++ evaluation board design ﬁles are available for download on the Vicor website.

Table 4

Design ﬁles

Product

PI3741‑0x‑EVAL1 ODB++

Deisgn

File Format

Link to Download

PI3741‑0x Eval ODB++.zip

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Limitation of Warranties

Information in this document is believed to be accurate and reliable. HOWEVER, THIS INFORMATION IS PROVIDED “AS IS” AND WITHOUT ANY WARRANTIES, EXPRESSED OR IMPLIED, AS TO THE ACCURACY OR COMPLETENESS OF SUCH INFORMATION. VICOR SHALL HAVE NO LIABILITY FOR THE CONSEQUENCES OF USE OF SUCH INFORMATION. IN NO EVENT SHALL VICOR BE LIABLE FOR ANY INDIRECT, INCIDENTAL, PUNITIVE, SPECIAL OR CONSEQUENTIAL DAMAGES (INCLUDING, WITHOUT LIMITATION, LOST PROFITS OR SAVINGS, BUSINESS INTERRUPTION, COSTS RELATED TO THE REMOVAL OR REPLACEMENT OF ANY PRODUCTS OR REWORK CHARGES).

Vicor reserves the right to make changes to information published in this document, at any time and without notice. You should verify that this document and information is current. This document supersedes and replaces all prior versions of this publication.

All guidance and content herein are for illustrative purposes only. Vicor makes no representation or warranty that the products and/or services described herein will be suitable for the speciﬁed use without further testing or modiﬁcation. You are responsible for the design and operation of your applications and products using Vicor products, and Vicor accepts no liability for any assistance with applications or customer product design. It is your sole responsibility to determine whether the Vicor product is suitable and 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 APPLICATIONS OR OTHER SIMILAR MEDICAL AND AUTOMOTIVE STANDARDS. VICOR DISCLAIMS ANY AND ALL LIABILITY FOR INCLUSION AND/OR USE OF VICOR PRODUCTS IN SUCH EQUIPMENT OR APPLICATIONS AND THEREFORE SUCH INCLUSION AND/OR USE IS AT YOUR OWN RISK.

Terms of Sale

The purchase and sale of Vicor products is subject to the Vicor Corporation Terms and Conditions of Sale which are available at: (http://www.vicorpower.com/termsconditionswarranty)

Export Control

This document as well as the item(s) described herein may be subject to export control regulations. Export may require a prior authorization from U.S. export authorities.

Vicor Corporation

25 Frontage Road

Andover, MA, USA 01810

Tel: 800‑735‑6200

Fax: 978‑475‑6715

www.vicorpower.com

10/18

Customer Service: custserv@vicorpower.com

Technical Support: apps@vicorpower.com

I2C™ is a trademark of NXP Semiconductor.

EXTreme LPHPower™ is a trademark of Samtec, Inc.

All other trademarks, product names, logos and brands are property of their respective owners.

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Authorized Distributor

Click to View Pricing, Inventory, Delivery & Lifecycle Information:

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