User's Guide

SLLU136–September 2011

ISO5500EVM

This document describes the ISO5500 Evaluation Module (EVM) and allows designers to analyze and

evaluate the Texas Instruments ISO5500 Isolated Gate Driver.

The ISO5500EVM can be used to evaluate device parameters while acting as a guide for board layout.

The board allows the user to evaluate device performance using a simulated (10-nF) IGBT load installed

on the board, or to install an IGBT or MOSFET (TO-247 package) onto the board and drive it with the

ISO5500.

Contents

1 Introduction .................................................................................................................. 1

1.1 Overview ............................................................................................................ 1

1.2 ISO5500EVM Kit Contents ....................................................................................... 2

2 Printed-Circuit Board ....................................................................................................... 2

2.1 ISO5500 Operation ................................................................................................ 2

2.2 Schematic and Bill of Materials .................................................................................. 5

List of Figures

1 ISO5500 Pinout and Functional Block Diagram ........................................................................ 2

2 High-Side Interconnection Diagram ...................................................................................... 4

3 Low-Side Interconnection Diagram....................................................................................... 4

4 Component Changes to Change Turnon/Turnoff....................................................................... 5

List of Tables

1 Test Points................................................................................................................... 5

2 Bill of Materials .............................................................................................................. 6

1 Introduction

1.1 Overview

This ISO5500EVM was designed to allow the user to evaluate the performance and features of the

ISO5500. This includes the IGBT desaturation protection (DESAT) and the UVLO circuit that ensures a

sufficient gate voltage is available to drive the IGBT or MOSFET. The printed-circuit board (PCB) also

includes provisions to adjust the turnon/turnoff characteristics by changing the loading between the

ISO5500 output and the IGBT (or MOSFET) gate.

The EVM kit includes the ISO5500 data sheet. Figure 1 shows the device pinout and the functional block

diagram.

QuietZone is a trademark of 3M.

SLLU136–September 2011 ISO5500EVM

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DESAT

CC2

OUT

IN+

IN-

CC1

GND1

RESET

FAULT

GND1

DEVICEPINOUT

Printed-Circuit Board

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Figure 1. ISO5500 Pinout and Functional Block Diagram

1.2 ISO5500EVM Kit Contents

• ISO5500EVM printed-circuit board with ISO5500DW installed (P/N 6512405)

• ISO5500EVM User’s Guide (This document)

• ISO5500 data sheet

2 Printed-Circuit Board

The ISO5500 is an isolated gate driver with several important features. The printed-circuit board (PCB)

has been designed to support this device and to allow the user to evaluate its basic operation and

features. The left side of the PCB contains the interface to the input, control, and status functions of the

integrated circuit (IC). The right side of the PCB has been designed to interface to an IGBT (or MOSFET).

No electrical connections exist between the right and left sides of the PCB.

Refer to the ISO5500EVM schematic and bill of materials to become familiar with the PCB components

and layout. The PCB files (Gerber/ODB) are available from Texas Instruments on request.

2.1 ISO5500 Operation

2.1.1 Left-Side Operation: DC Power, Control, and Status

2.1.1.1 DC Power

The left side of the ISO5500 (and therefore the PCB) can be operated using either a +3.3-V (±10%) or

+5-V (±10%) dc power supply. The small amount of dc current required (<20 mA) means that the device

can also be battery operated. The dc power supply must be connected to TP10 (+5 Vdc) and TP9 (+5-Vdc

return). Also, a user can solder wires directly to the PCB from the dc power supply by means of the plated

through-holes located next to the test points.

2.1.1.2 Control and Status

The interface to the device is via the JMP1 header. It contains the VIN+ and VIN– inputs, the device

RESET, and FAULT indicator output. The JMP1 header allows easy connections to test equipment using

standard clip leads or QuietZone™ connectors. Each of the four signals also has a test point for additional

connections. These are TP1 through TP4.

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Printed-Circuit Board

2.1.2 Right-Side Operation

2.1.2.1 DC Power

Power is provided to Vcc2 on the right side of the device at TP12 (+Vdc) and TP11 (–Vdc). The dc supply

must be able to provide a bias voltage over the range of +15 Vdc to +30 Vdc. As the current requirement

is extremely low, the user may choose to operate the ISO5500 by battery. Solder holes are provided next

to the test points if the user chooses to hardwire these connections. If a negative gate drive is required, a

dc supply (or battery) must be connected across VE (P5 or MFG1) to VEE (MGF11 or TP11). The voltage

range must be between 0 V and 15 Vdc.

2.1.2.2 DESAT – JMP2

One of the features of the ISO5500 is the IGBT desaturation protection. JMP2 provides access to the

DESAT pin. It is a 2-pin male header, and installing a shorting jumper onto JMP2 disables the DESAT

function.

2.1.2.3 IGBT (or MOSFET)

As shipped, the ISO5500EVM does not have an IGBT installed. The user can evaluate device operation

using a simulated IGBT load or they can remove the simulated load and install an IGBT onto the board.

Most IGBTs are available in the standard TO-247 package. The PCB has provisions to solder an IGBT

directly onto the board.

2.1.2.3.1 No IGBT (or MOSFET) Installed – JMP3

When using the simulated load, the user must install a jumper short onto JMP3. This connects a 10-nF

capacitor (C9) to the Vout pin. The simulated IGBT consists of the 10-Ω gate resistor (R4) and this 10-nF

capacitor (C9).

2.1.2.3.2 IGBT (or MOSFET) Installed – REMOVE JMP3

If the user chooses to install an IGBT, JMP must be left open with no shorting jumper installed. The PCB

has been designed with several large plated-through holes (or vias) to support both high-side and low-side

drive configurations. (Note: Plated-through holes are designated as MFGx on the schematic.) The

connections for these modes are described next.

2.1.2.3.3 High-Side/Low-Side Operation and Interconnection

The connections required for high-side and low-side operation are shown in Figure 2 and Figure 3,

respectively. The user can select the load and install it directly on the PCB.

SLLU136– September 2011 ISO5500EVM

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Part #	TPSA105K020R3000
Description	CAP 1UF 20VDC 10% 3.2 X 1.6 X1.6MM SMD 3216-18 1% - Tape Additional Information:
Category	CAPACITOR
Availability	In Stock
Qty	13

TPSA105K020R3000

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