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USER GUIDE | UG:307
PI352x-0x-EVAL1
®
Cool-Power
ZVS Switching Regulators
60V
Buck Customer Eval Board User Guide
IN
Contents
Page
Introduction
10
11
1
3
3
3
4
4
4
5
6
8
9
Note: Acutal evaluation board appearance may vary slightly depending on product ordered
Introduction
This customer evaluation board is designed for the PI352x family of 10 x 14 ZVS Bucks. It
can be configured to demonstrate a single product in a stand-alone local sense or a remote
sense configuration.
The PI352x family of wide input range DC-DC ZVS-Buck regulators feature high efficiency with
integrated controller, power switches, and support components all within a high density 0.4" x
0.55" System-in-Package (SiP). Required components are placed inside a demarcation featuring a
solution size of 7.3" x 1.74". The demarcation includes an external inductor, compensation capacitor,
voltage selection resistors, soft-start capacitor, and input-output capacitors to form a complete
DC-DC regulator.
UG:307
vicorpower.com
Applications Engineering: 800 927.9474
Page 1
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Table of Contents
Related Manuals for VICOR PI352 series
Summary of Contents for VICOR PI352 series
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Page 1: Table Of Contents
USER GUIDE | UG:307 PI352x-0x-EVAL1 ® Cool-Power ZVS Switching Regulators Buck Customer Eval Board User Guide Contents Page Introduction Box Contents Recommended Test Equipment Features Board Operation Modes Thermal Consideration Power Up Procedure Board Description General Components Test Points Description Sockets Description Schematic Schematic (Cont.) - Page 2 Bill of Materials IMPORTANT NOTICE: Be sure to read the precautions below entirely BEFORE using the Evaluation Board. Do not operate the evaluation board unless you have the appropriate safety precautions in place on your bench to ensure a successful experience. The list below is not comprehensive and is not a substitute for common sense and good practice.
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Page 3: Recommended Test Equipment
The evaluation board is designed to faciliatate the evaluation of the performance of Vicor’s mounted ZVS buck product. Sockets are provided to permit quick probing. Input sockets can be used to place a bulk capacitor. The evaluation board provides lugs, and bottom layer banana jack footprint for input and output connections, signal connectors allowing wire, signal test points for easy connection to standard test equipment, and Kelvin Johnson-Jack for accurate voltage measurements of power nodes. -
Page 4: Board Operation Modes
Board Operation Modes S101 provides control over enable. In the “OFF” position, the switch will connect SGND pin to the EN net, which disables the regulator output. In the “ON” position, the EN net is allowed to float. The PI352x evaluation board supports the following operating modes: Mode S202 S201... -
Page 5: Board Description
Direct airflow from the cooling fan towards the evaluation board. 10. Download the latest product datasheet from Vicor power product page and have it on hand for reference 11. Apply input voltage greater than the minimum Input under-voltage lockout start... -
Page 6: General Components
Figure 2 Signal Connector and Header Pinout, Front View Remote Sense Remore Loop R214 SGND R211 Local Sense Local Loop J201 Note: Short pins (1 & 2 ; 3 & 4 ; 5 & 6) using Jumpers J110 J109 J108 General Components PI352x family product (PS101) Input lugs: Sized for #10 hardware. - Page 7 Loop compensation mode selection (S202): Used to select one of the following: Local Sense (LS): default. Single ended feedback loop using the internal to the regulator operational transconductance amplifier. +VOUT Lug is the local sensed location. +VOUT lug is connected to the Error Amplifier Inverting Input (EAIN) through a voltage divider network. Remote Sense (RS): Non-isolated remote sensing option using the internal to the regulator independent differential amplifier which outputs (VDIFF) is in turn connected to the transconductance amplifier input (EAIN) pin.
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Page 8: Test Points Description
Test Points Description Each square point test point can be used with standard probes, clips or hooks. All test points are labeled on the board. Each test point is accompanied with an adjacent socket for adding a test lead or to facilitate wiring to external circuitry. -
Page 9: Sockets Description
Sockets Description Each socket accepts 0.015 – 0.025 inch diameter leads for easy installation of solid wires and through- hole components for use with external circuit and test equipment. Table 2 Reference Designator Sockets Descriptions Functional Name Description (Shown in Assembly Drawing) Input Input voltage test points. -
Page 10: Schematic
Schematic Figure 3 PI352x Evaluation Board Schematic Page 1 UG:307 vicorpower.com Applications Engineering: 800 927.9474 Page 10... -
Page 11: Schematic (Cont.)
Schematic (Cont.) Figure 4 PI352x Evaluation Board Schematic Page 2 UG:307 vicorpower.com Applications Engineering: 800 927.9474 Page 11... - Page 12 Figure 5 PI352x Evaluation Board Assembly, Top Side J102 Cool-Power ZVS Switching Buck Regulator +VIN PCB# 44841 +VOUT Reserved Serial # Label C113 C112 C120 C111 C121 L102 TP104 C122 TP106 TP105 TP101 TP102 TP112 J101 PGND PGND J201 C302R307 C202 C201 C203...
- Page 13 Figure 6 PI352x Evaluation Board Assembly, Bottom Side J104 J105 C116 C117 C115 C118 C114 LGH_IN C119 J107 J106 R215 R218 R104 R213 R219 C124 R210 R102 R222 R207 R208 R209 R220 R216 BOTTOM VIEW UG:307 vicorpower.com Applications Engineering: 800 927.9474 Page 13...
- Page 14 Bill of Materials Table 3 Reference Manufacturer Description Manufacturer PI352x Common Components Designator Part Number C101-C110 CAP X7R 2.2µF 10% 100V 1210 Murata GRM32ER72A225KA35L C111-C122 CAP X7R 47µF 10% 10V 1210 Murata GRM32ER71A476KE15L C124 CAP X7R .1µF 10% 100V 0603 Murata GRM188R72A104KA35J C201...
- Page 15 R309 Table 4 Reference Manufacturer Description Manufacturer PI352x Design Specific Designator Part Number Components Evaluation board number: PI3525-00-EVAL1 VICOR POWER SNGLTD PCB PI3225-00-EVAL1 44841 COMPONENT COOL-POWER NI BUCK REG VICOR POWER PS101 PI3525-00-LGIZ 60V/5V 20A COMPONENT L101 IND 230nH 10% 70A 22.2X8.2...
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