Manual

ManualsBrandsVicor ManualsHardwareVI Chip Remote Sense PRM Evaluation Board

UG:016 vicorpower.com Applications Engineering: 800 927.9474 Page 1

Introduction

The Remote Sense PRM evaluation boards described in this document are designed

to use with the PRM family of PRM regulators and demonstrate the beneﬁts of

the Factorized Power Architecture

™

. These evaluation boards are not designed for

installation in end user equipment. The system demonstrates the use of a PRM

(the pre-regulator module) and a VTM (the current multiplier or the voltage

transformation module) for general laboratory evaluation only.

IMPORTANT NOTICE:

Be sure to read this design guide manual thoroughly before using this product.

Pay attention to all cautions and warnings.

This user guide is not comprehensive and is not substitute for common sense and

good practice. For example:

n When testing electronic product always use approved safety glasses.

n Provide a strain relief for wires and place the system on the bench in such a way as

to prevent accidental displacement from bench top.

n Remove the power and use caution when connecting and disconnecting test probes

and interface lines to avoid unintentional short circuits and contact with

hot surfaces.

n Never use a jumper in place of the fuse. Replace the fuse only with its equivalent

type and rating.

n Never attempt to disconnect the evaluation board from a VTM

evaluation

board while power is applied. This system is not designed to demonstrate the hot

plug capability.

VI Chip

Remote Sense PRM

Evaluation Board

USER GUIDE | UG:016

Written by: Ankur Patel

Applications Engineer

June 2014

Contents Page

Introduction 1

Considerations for 3

Remote Sense only PRM

Contents 3

Features 4

Board Description 5

General Components 6

Test Points 8

Sockets 9

Schematic 10

Assembly Drawings 12

Bill of Materials 14

VTM Evaluation Boards 17

Recommended Test 18

Equipment

Board Operating Modes 19

Common Features 20

Remote Sense 21

Operating Mode: PRM

Remote Sense 22

Operating Mode: PRM

& VTM

Trim and Soft Start 23

Adjustment

Current Limit 24

Adjustment

Slave Operating 24

Mode

Paralleling 25

Conclusion 25

For use with PCB part numbers: 39573 and 38693

Summary of content (25 pages)

PAGE 1
USER GUIDE | UG:016 For use with PCB part numbers: 39573 and 38693 VI Chip® Remote Sense PRM Evaluation Board Written by: Ankur Patel Applications Engineer June 2014 Contents Page Introduction 1 Considerations for Remote Sense only PRM 3 Contents 3 Features 4 Board Description General Components Test Points Sockets 5 6 8 9 Schematic 10 Assembly Drawings 12 Bill of Materials 14 VTM Evaluation Boards 17 Recommended Test Equipment 18 Board Operating Modes Common Features 19 20 Remote
PAGE 2
The Remoste Sense PRM evaluation board can be used to demonstrate a standalone buck-boost regulator or in conjunction with a VTM evaluation board to enable evaluation of a Factorized Power Architecture™ (FPA) system. There are many combinations possible using PRM and VTM evaluation boards, but the focus in this user guide is using one PRM evaluation board and one VTM evaluation board, with a brief overview of how to parallel boards.
PAGE 3
Considerations for Remote Sense only PRM This board is designed to accomodate different types of PRMs. Therefore, certain circuitry on the board is not populated and there are additional considerations for using Remote Sense only PRMs. The Remote Sense PRM Evaluation Board does not operate in default switch S10 setting which has all switches in the OFF position. Switch at position 1 must remain in the OFF position.
PAGE 4
Features 1. Input and output lugs for source and load connections. 2. Input fuse (appropriately rated). 3. Input filtering and sockets to place through-hole input aluminum-electrolytic capacitor for source decoupling. 4. Output filtering and sockets to place through-hole output aluminum-electrolytic capacitor. 5. Switch for enabling and disabling the PRM through the ENABLE pin. 6. Open drain MOSFET for enabling and disabling the PRM using external source. 7.
PAGE 5
Board Description The following section provides a detailed description of the evaluation board components, test points and sockets. Figure 1. Board description Figure 2. Power/signal connectors pinout, front view -OUT 10 VC 8 -OUT +OUT +OUT 6 4 2 -S 10 9 -OUT 7 VC 5 3 1 -OUT +OUT +OUT 9 +S J13 Power/signal connector UG:016 vicorpower.com V T M_-IN 4 2 8 6 7 5 3 1 V _T M V _PC V _IM J10 Signal connector Applications Engineering: 800 927.
PAGE 6
General Components 1. Remote Sense PRM (PS10) 2. Input lugs: Sized for #10 hardware. Use these for making connection to the input source. This board does not contain reverse polarity protection. Check for proper polarity before applying the power. 3. Input fuse (F10): Appropriately rated. 4. Input filtering: Input capacitor (CIN) and filtering (inductor and ceramic capacitors) allows for stable operation with most input sources.
PAGE 7
General Components (Cont.) 10. Signal connector (J10): Used to transfer VTM® PC, IM, TM, -IN and Output Sense signals between the PRM and VTM boards. TM pin of VTM provides feedback to VT pin of PRM to enable temperature compensation in Adaptive Loop Operation of PRM® and VTM. 11. Power/Signal connector (J13): Used to transfer power (+OUT/-OUT) and VC to downstream VTM board when used. 12.
PAGE 8
Test Points Description Each test point has a socket which accepts 0.015 – 0.025 inch diameter leads for easy installation of solid wires and through-hole components. All the test points are brought out to the edge of the board to allow for easy measurement and/or connection to the user’s external circuitry. All test points are labeled and routed to the edge of the board. Each test point is accompanied with an adjacent socket for adding a test lead or to facilitate wiring to external circuitry. Table 3.
PAGE 9
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 4. Reference Functional Sockets description Designator Name Functional Description H57, H58 Input Sockets are used for easy installation of through-hole 100 V rated Capacitor aluminum-electrolytic capacitor.
PAGE 10
UG:016 vicorpower.
PAGE 11
SG SGND TRIM POT EXT TRIM R46 0603 PR PC SG P11 2 4 6 T P72 CN 6_DIGIKEY_95278 1 3 5 CO NN3PIN J17 CONN3PIN J18 TRIM/TM CONTROL SELECT R3 5 0603 R4 0 SIGNALS FOR PARALLELING H54 R3 8 1206 T P70 T P42 T P40 T P71 3 2 1 H50 3 2 1 T P69 TM EXT AL SGND AL POT H53 R3 7 1206 T P74 T P41 T P39 H49 T P73 SG T P75 P10 2 4 6 NC3 T P76 CN6_DIGIK EY_95278 1 3 5 AL/NC CONTROL SELECT R3 4 0603 R3 9 Note: Components for TRIM and AL controls are not applied.
PAGE 12
Assembly Drawings H57 C17 L10 PS10 PF43 PF44 H56 PF46 R23 J13 H32 J14 C14 C13 C11 C12 PF19 H35 PF49 H33 H36 H27 H25 H24 H11 H17 H34 H12 H16 H18 H13 H21 H10 H22 H15 H19 H14 PF16 J16 PF17 TP26 TP25 PF15 TP27 PF14 TP17 PF13 PF12 TP14 PF11 TP34 PF10 TP18 PF09 TP13 PF08 TP15 PF07 TP21 TP16 PF06 TP10 PF05 TP12 PF04 TP22 PF03 TP11 TP19 PF02 PF01 TP20 J17 J18 R46 H20 TP33 FID01 TP31 H44 H43 C20 R28 H42 J10 L11 PF18 J15 PF41 PF38
PAGE 13
Assembly Drawings (Cont.) Figure 4c. Bottom view: Half-chip/Full-chip evaluation board assembly drawing TP73 TP69 TP70 TP74 TP61 TP63 TP72 TP76 TP71 TP75 TP65 TP68 TP67 TP57 C25 C26 TP66 TP59 TP56 TP58 TP64 TP62 TP46 TP48 TP54 UG:016 TP50 vicorpower.com TP60 TP52 TP49 TP45 TP51 TP47 TP55 TP53 Applications Engineering: 800 927.
PAGE 14
Bill of Materials Following table describes the most common components of full chip and half chip Remote Sense PRM evaluation boards. Table 5. Common components Reference Manufacturer Description Manufacturer Part Number Designator C11, C12, C13, C14 CAP X7R 2.2uF 10% TDK CORP OF AMERICA C3225X7R2A225KT5LOU 100V 1210 .102 MAX HT C15, C16, C17 CAP X7R 4.7uF 20% 100V 2220 TDK C5750X7R2A475M C18, C21, C23 CAP X7R .
PAGE 15
Bill of Materials (Cont.) Following table describes the most common components of all four versions of PRM® evaluation boards. Table 5 (Cont.). Common components Reference Manufacturer Manufacturer Description Designator Part Number R26 Design Specific – see Table 5 – Remote Sense Operation – set the constant current limit R28* – not applied – use sockets RES 20K OHM 1/4W 1% AXIAL KOA SPEER MF1/4DCT52R2002F R29 RES 54.
PAGE 16
Bill of Materials (Cont.) Following table describes the design specific components of all four versions of PRM® evaluation boards. Table 6.
PAGE 17
VTM® Evaluation Boards The Remote Sense PRM evaluation board is designed to work with all types of VTM® evaluation boards to facilitate testing of virtually any PRM®/VTM combination. The VTM evaluation board contains dual connectors designed to mate with J10 and J13 on PRM evaluation board. The additional signal connector is used to transfer VTM signal pins, as well as S+ and S- signals between boards.
PAGE 18
Figure 7. Remote Sense PRM evaluation board connection to VTM evaluation board Recommended Test Equipment The following is a list of recommended test equipment. 1. DC power supply: 0 - 80 V, 600 W minimum 2. Load: Rated appropriately based on output voltage, current and power requirements. 3. Digital multi-meters (DMMs) 4. Oscilloscope + probes 5. Function generator (for external enable/disable) 6. Auxiliary bench voltage supply 7. Network analyzer 8.
PAGE 19
Line and Load Connections n Make sure that input power supply is OFF. n Connect the input power supply positive lead to the +IN input lug of the evaluation board. n Connect the input power supply return lead to the –IN input lug of the evaluation board. n Connect the output lug +OUT to the positive terminal of the electronic load. n Connect the output lug –OUT to the return terminal of the electronic load. n Verify proper polarity of the connections. n Place the input capacitance 22 uF, 100 V.
PAGE 20
Figure 9. Switch configuration ON OFF LOCAL SENSE (Single Ended) using PRM ON OFF REMOTE SENSE (Differential) using PRM and VTM ON OFF SLAVE using PRM Postion number 1 2 3 4 5 6 7 8 9 10 Figure 9 provides the illustration for how to configure the switch for each operating mode. Common Features in all Modes of Operations n On / off control to enable and disable the PRM® in the presence of input power.
PAGE 21
Remote Sense Operating Mode using PRM®: Local Sensing (Single Ended) Mode select switch S10 setting: keep the switch S10 setting at all positions as shown in following illustration. Figure 11. ON OFF Local Sensing (single ended) Postion number LOCAL SENSE (Single Ended) 1 2 3 4 5 6 7 8 9 10 The following table describes the switch configuration. Table 7. Switch configuration in local sensing Switch Position Number ON or OFF Connection TM pin must be left open.
PAGE 22
Remote Sense operating mode using PRM® and VTM®: Non-Isolated Remote Sensing (Differential Sensing) Mode select switch S10 setting: keep the switch S10 setting at all positions as shown in the following illustration. Figure 13. ON OFF Remote Sense (differential) Postion number REMOTE SENSE (Differential) 1 2 3 4 5 6 7 8 9 10 Note: To use this configuration, the VTM isolation must be broken by tying VTM -IN and VTM -OUT together. The following table describes the switch configuration.
PAGE 23
In this configuration, the PRM® and VTM® evaluation boards are connected together to form a PRM / VTM pair and regulation is performed at the VTM module output. The +SENSE and -SENSE connections are made at the VTM output through connector J10. This is a non-isolated configuration and therefore the VTM isolation must be broken by tying the VTM -OUT and VTM -IN pins together. The VTM evaluation board has provisions for easily breaking the isolation.
PAGE 24
The slew rate of the output voltage during startup may be controlled by controlling the rate-of-rise of the voltage at VREF node. This can be achieved using soft-start capacitance C24. By default, C24 is populated with 0.1 uF ceramic capacitance. Sockets H55 and H56 can be used for installation of additional through-hole soft-start capacitance. It is not recommended to extend the soft start beyond 10msec. Figure 15.
PAGE 25
Paralleling The paralleling and current sharing capability of the devices can be demonstrated by stacking multiple evaluation board and interconnecting the inputs and outputs with standoffs of sufficient current rating to create a parallel array. See Figure 17 below. One board should be configured normally for Remote Sense operation and placed on top for easy access to control circuitry. The remaining PRMs should be configured as Slaves and placed underneath.