Texas Instruments TPS2330 User Manual

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TPS2330 48 V Telecom

Hot Swap Evaluation

Module and Interface Card

User’s Guide

April 2001

PMP PD & PS

SLVU048

IMPORTANT NOTICE

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Copyright 2001, Texas Instruments Incorporated

How to Use This Manual

Preface

Read This First

How to Use This Manual

This document contains the following chapters:

-Chapter 1— Introduction

-Chapter 2— 48-VTelecom Hot Swap

-Chapter 3— Schematics of the EVM and the Interface Card

-Chapter 4— Layouts of the EVM and the Interface Card

-Chapter 5— Setup of the EVM

-Chapter 6— Test Points

FCC Warning

This equipment is intended for use in a laboratory test environment only. It generates, uses, and can radiate radio frequency energy and has not been tested for compliance with the limits of computing devices pursuant to subpart J of part 15 of FCC rules, which are designed to provide reasonable protection against radio frequency interference. Operation of this equipment in other environments may cause interference with radio communications, in which case the user at his own expense will be required to take whatever measures may be required to correct this interference.

Read This First

iii

iv

Running Title—AttributeReference

Contents

1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1248-VTelecomHot-SwapEVM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-13 Schematics of the EVM and the Interface Card . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-14 Layouts of the EVM and the Interface Card . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-15 Setup of the EVM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-16 Test Points . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-1

Figures

3–1Schematic of the Interface Card (SLVP155) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-13–2Schematic of the48-VHot-SwapEVM (SLVP184) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-24–1Top Layer of the Interface Card and Placement of the Components . . . . . . . . . . . . . . . . . .4-24–2Top Layer of the48-VHot-SwapEVM and Placement of Components . . . . . . . . . . . . . . .4-35–1Evaluation Setup of theHot-SwapBoard EVM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-2

Tables

3–1

Components on the Interface Card (SLVP155), Bill of Materials . . . . . . . . . . . . . . . . . . . . .

3-3

3–2

Components on the 48-VHot-SwapEVM (SLVP184), Bill of Materials . . . . . . . . . . . . . . .

3-3

Contents v

Running Title—AttributeReference

vi

Chapter 1

Introduction

Fast development of telecommunications and networks has accelerated growth of products with hot-plugcapability to ensure that systems are always on. Manyhot-swaporhot-plugdevices are already available in the worldwide market. However, most such devices are forlow-voltageapplications, whereas48-Vis a standard voltage in most communication systems. The TPS23xx series ofhot-swapcontrollers are principally designed for low voltage applications, but can also be used in very high voltage systems if appropriately designed.

The TPS2330 is a Texas Instruments hot-swapcontroller that eliminates highfrequencyhot-plugorhot-removaltransients, reduces inrush current, and provides overcurrent protection. To demonstrate thishot-swapcontrollability athigh-voltagesystems, an evaluation module has been developed, as presented in this user’s guide. The evaluation module (EVM) can help designers evaluate thehot-swapcontroller and simulatehot-insertionandhot-removalactions under varied conditions.

Users will need a 48-Vdc voltage supply to test the operation of the EVM.

Introduction 1-1

1-2

Introduction

Chapter 2

48 V Telecom Hot Swap EVM

With the rapid growth of internet and telecommunications in general, more and more electronic systems are required to run continuously. Therefore, redundant systems or modules may be required to prevent the crashing of systems. While redundant systems have proved feasible, they are also very costly. Further, a simple redundant system as a backup is often inadequate because any errant part in the backup can jeopardize the whole system. Thus, we should develop ways to update the system regularly or remove errant parts and insert new modules while the system is still running. Central to such requirements for today’s electronic systems is the hot-plugorhot-swapcapability.

The TPS2330 is a single-channelhot-swapcontroller that uses externalN-channelMOSFETs inhot-swapapplications. The device integrates features such as overcurrent protection, inrush current control,output-powerstatus reporting, and separation of load transients from actual load increases, which are the critical requirements forhot-swapapplications. For a detailed description of functions and characteristics of the TPS2300, refer to the data sheet, literature number SLVS265A. Check data sheet and ordering information on Web site:

http://focus.ti.com/docs/prod/productfolder.jhtml?genericPartNumber=TPS2331

Because telecommunications applications often use –48-Vor48-Vpower supplies, a few external components (including a Zener diode and a resistor) are needed to make the TPS2330 suitable to meet the voltage requirements. To assist designers in the evaluation of thehot-swapcontrollers for such highvoltage applications, a set of evaluation modules has been developed: one is the48-Vtelecomhot-swapEVM, and the other is an interface card.

The following chapters will present the schematics, layouts, and evaluation procedures for the EVM.

48-VTelecomHot-SwapEVM

2-1

2-2

48-VTelecomHot-SwapEVM