Texas Instruments SLUU083A Manuale utente

   

  

     

July 2002 Advanced Analog Products

User’s Guide

SLUU083A

IMPORTANT NOTICE

Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, modifications,

enhancements, improvements, and other changes to its products and services at any time and to discontinue

any product or service without notice. Customers should obtain the latest relevant information before placing

ordersandshouldverifythatsuchinformationiscurrentandcomplete.AllproductsaresoldsubjecttoTI’sterms

and conditions of sale supplied at the time of order acknowledgment.

TI warrants performance of its hardware products to the specifications applicable at the time of sale in

accordance with TI’s standard warranty. Testing and other quality control techniques are used to the extent TI

deems necessary to support this warranty. Except where mandated by government requirements, testing of all

parameters of each product is not necessarily performed.

TI assumes no liability for applications assistance or customer product design. Customers are responsible for

their products and applications using TI components. To minimize the risks associated with customer products

and applications, customers should provide adequate design and operating safeguards.

TIdoesnotwarrantorrepresentthatanylicense, eitherexpress orimplied, isgranted underanyTIpatentright,

inwhichTIproductsorservicesareused.InformationpublishedbyTIregardingthird–partyproductsorservices

does not constitute a license from TI to use such products or services or a warranty or endorsement thereof.

Use of such information may require a license from a third party under the patents or other intellectual property

of the third party, or a license from TI under the patents or other intellectual property of TI.

Reproduction of information in TI data books or data sheets is permissible only if reproduction is without

alteration and is accompanied by all associated warranties, conditions, limitations, and notices. Reproduction

of this information with alteration is an unfair and deceptive business practice. TI is not responsible or liable for

such altered documentation.

Resale of TI products or services with statements different from or beyond the parameters stated by TI for that

product or service voids all express and any implied warranties for the associated TI product or service and

is an unfair and deceptive business practice. TI is not responsible or liable for any such statements.

Mailing Address:

Texas Instruments

Post Office Box 655303

Dallas, Texas 75265

Trademarks

iii

Read This First

Preface

Read This First

About This Manual

Thisuser’sguidedescribesthe bq2400xevaluationmodule.TheEVMconve-

niently evaluates a linear Li-ion bq2400x charge-management solution for

one- and two-cell battery-pack applications. This guide describes a complete

designed-and-testedcharger,whichdeliversupto1.2Aofcontinuous-charge

current for one- or two-cell applications

How to Use This Manual

This document contains the following chapters:

-Chapter 1—Introduction

-Chapter 2—Test Summary

-Chapter 3—Physical Layouts

-Chapter 4—Bill of Materials

-Appendix A—Schematic

Related Documentation From Texas Instruments

-bq24001, bq24002, bq24003 data sheet, literature number

SLUS462A

-bq24004, bq24005, bq24006 data sheet, literature number

SLUS476

Trademarks

PowerPAD is a trademark of Texas Instruments.

Running Title—Attribute Reference

Contents

1 Introduction 1-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1.1 Background 1-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1.2 Performance Specification Summary 1-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2 Test Summary 2-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2.1 Setup 2-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2.1.1 I/O Connections 2-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2.1.2 Jumper-Selectable Configuration 2-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2.2 Test Procedures 2-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2.2.1 For Single-Cell Applications 2-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2.2.2 For Two-Cell Applications 2-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3 Physical Layouts 3-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3.1 Board Layout 3-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4 Bill of Materials 4-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4.1 Bill of Materials 4-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4.2 bq2400x Charge Status Configurations 4-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

A Schematic A-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Figures

3–1 SLUP051 Board Layout Top Layer 3-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3–2 SLUP051 Board Layout Bottom Layer 3-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3–3 SLUP051 Top Assembly View 3-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Schematic A-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Tables

1–1 Performance Specification Summary (One Cell) 1-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1–2 Performance Specification Summary (Two Cell) 1-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4–2 SLUP051 Bill of Materials 4-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1-1

Introduction

This user’s guide describes the bq2400x Evaluation Module (SLUP051). The

EVM conveniently evaluates a linear Li-ion bq2400x charge-management

solution for one- and two-cell battery-pack applications. This guide describes

acompletedesigned-and-testedcharger,whichdeliversupto1.0Aofcontinu-

ous-charge current for one- or two-cell applications.

Topic Page

1.1 Background 1-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1.2 Performance Specification Summary 1-2. . . . . . . . . . . . . . . . . . . . . . . . . . .

Chapter 1

Background

1-2

1.1 Background

The bq2400x series ICs are advanced Li-Ion linear charge management

devices for highly integrated and space-limited applications. They combine

high-accuracy current and voltage regulation; FET pass-transistor and

reverse-blocking Schottky; battery conditioning, temperature, or input-power

monitoring; charge termination; charge-status indication; and charge timer in

a small, 20-lead TSSOP PowerPAD package.

The bq2400x continuously measures battery temperature using an external

thermistor. For safety reasons, the bq2400x inhibits charge until the battery

temperature is within the user-defined thresholds. Alternatively, the user can

monitor the input voltage to qualify charge. The bq2400x series then charge

the battery in three phases: preconditioning, constant current and constant

voltage. If the battery voltage is below the internal low-voltage threshold, the

bq2400x uses trickle-charge to condition the battery. A preconditioning timer

is provided for additional safety. Following preconditioning, the bq2400x

applies a constant-charge current to the battery. An external sense-resistor

sets the magnitude of the current. The constant-current phase is maintained

until the battery reaches the charge-regulation voltage. The bq2400x then

transitions to the constant voltage phase. The user can configure the device

for cells with either coke or graphite anodes.

Charge is terminated by either of the following methods:

-Maximum time

-Minimum current detection

1.2 Performance Specification Summary

This section summarizes the performance specifications of the SLUP051

EVM. Table 1–1 gives the performance specifications of the hubs.

Thebq2400xautomaticallyrestartsthechargeifthebatteryvoltagefallsbelow

an internal recharge threshold.

Table 1–1.Performance Specification Summary (One Cell)

Specification Test Conditions Min Typ Max Units

Input dc voltage, VDC 4.9 5.0 †V

Battery charge current ICHG

J4 shorted, J3 open 0.4 0.5 0.6

attery c

arge current,

CHG J3 shorted, J4 open 0.9 1 1.1

Battery voltage regulation VREG

J6 set to VCC 4.15 4.20 4.25

attery vo

tage regu

on,

REG J6 set to GND 4.05 4.1 4.15

Therm fault

High, TBATMAX J2 set to Therm 43 48 53 °

erm

tLow, TBATMIN J2 set to Therm 0 5 10 °

APG (user defined, see data sheet) J2 set to APG ‡

Power dissipation, PD(VI-VO)×Iload 2.3 W

†VI,forasingle-cell,shouldnotexceed5.3VDCforthe1-Achargerateand7.6Vforthe0.5-Achargerate.(VIistheinputvoltage

tothebq2400xIC,pins2and3.Thepowersupplysourcevoltage, at J1, is 0.1VlargerthanVIbecauseoftheregulatedvoltage

drop across the current sense resistor, during constant current regulation.)

‡If J2 is set to APG, then the chip will be disabled when the input is outside of this range: 4.02 V±0.07 V and 10.76 V ±0.09 V.

Performance Specification Summary

1-3

Introduction

Table 1–2.Performance Specification Summary (Two Cell)

Specification Test Conditions Min Typ Max Units

Input dc voltage, VDC 9.1 9.5 †V

Battery charge current ICHG

J4 shorted, J3 open 0.4 0.5 0.6

attery c

arge current,

CHG J3 shorted, J4 open 0.9 1 1.1

Battery voltage regulation VREG

J6 set to VCC 8.35 8.40 8.45

attery vo

tage regu

on,

REG J6 set to GND 8.15 8.20 8.25

Therm fault

High, TBATMAX J2 set to Therm 43 48 53 °

erm

tLow, TBATMIN J2 set to Therm 0 5 10 °

APG (user defined, see data sheet) J2 set to APG ‡

Power dissipation, PD(VI-VO)×Iload 2.3 W

†VI, for a 2-cell, should not exceed 9.1 VDC for the 1-A charge rate and 10.6 V for the 0.5-A charge rate. (VIis the input voltage

tothebq2400xIC,pins2and3.Thepowersupplysourcevoltage, at J1, is 0.1VlargerthanVIbecauseoftheregulatedvoltage

drop across the current sense resistor, during constant current regulation.)

‡If J2 is set to APG, then the chip will be disabled when the input is outside of this range: 4.02 V±0.07 V and 10.76 V ±0.09 V.

2-1

Test Summary

Thischaptershowsthetestsetupsused,andthetestsperformed,indesigning

the bq2400xEVM.

Topic Page

2.1 Setup 2-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2.2 Test Procedures 2-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Chapter 2

Setup

2-2

2.1 Setup

The bq2400X EVM board requires a DC power source to provide input power

and a single-cell lithium-ion or lithium-polymer battery to charge.

Note:

Other versions of the bq2400x IC can charge two-cell battery packs.

The test setup connections and jumper setting selections are listed below.

2.1.1 I/O Connections

Jack Connect to:

J1–VCC Power source positive output

J1–GND Power source negative output

J9–+ Positive lead of single lithium cell

J9––Negative lead of single lithium cell

J9 –VSENSE Tie to battery’s positive terminal

J10 –THERM Tie to thermistor lead in battery pack

J10 –GND Tie to other thermistor lead (may be GND)

2.1.2 Jumper-Selectable Configuration

Jumper Selection

J3 1-A charge, use two jumpers placed horizontally; no jumpers on J4

J4 0.5-A charge, use two jumpers placed horizontally, no jumpers on J3

J2 Adapter power good (APD) or battery’s thermistor

J5†Enable, on or off

J6 Regulationvoltage,4.2Vor4.1V(singlecell),8.4Vor8.2V(doublecell)

J7 Timer, 3-hour (float, no jumper), 4.5-hour, or 6-hour

J8 Stat2 green diode, connect for bq24002/3/5/6/8‡

†Thisjumperenables/disablestheICforbq24001/2/3/4/5/6.Forbq24007/8,thisjumperenables/

disables the change timer.

‡For bq24003/6/8 the evaluation board used two LED (red and green) in place of a single

dull-color LED. Therefore, when both LEDs are lit a yellow status is indicated.

2.2 Test Procedures

2.2.1 For Single-Cell Applications

Setuptheevaluationboardasdescribedabove,bymakingthenecessaryI/O

connections and jumper selections.

Note:

Before test and evaluation, it is important to verify that the maximum power

dissipation on the IC is not exceeded. Pmax = 2.3 W.

Pdiss, single cell = (VI–3 V) ×ICHG where VI= VCC –0.1 V

Test Procedures

2-3

Test Summary

Note:

VIfor a single cell should not exceed 5.3 VDC for the 1-A charge rate and

7.6 V for the .5-A charge rate.

Adjusttheinputpowersupplyfor5V. TheredLEDshouldilluminatetoindicate

charging, unless there is a fault or the battery is fully charged.

The bq2400x enters preconditioning mode if the battery is below the LowV

threshold. In this mode, the bq2400x trickle-charges with approximately

65 mA for approximately 23 minutes. If the battery does not reach the LowV

threshold after this period, then the charge current is terminated and the

bq2400x enters fault mode. The red LED flashes when in fault mode. This

feature may be tested in the .5-A charge mode by using a 5-Ω, 3-W resistor

in place of the battery. Fault mode is reset by toggling input power or enable

pin.

Once the battery charges to the LowV-stop threshold, the battery enters fast

charge mode and charges at the selected ICHG level (0.5-1 A).

The battery remains at the fast-charge mode until either the selected time

expires or the battery charges to the selected regulation voltage.

The time-out feature may be tested in the 0.5-A charge mode by using a 7 Ω,

3-Wresistorinplaceof thebattery.Applytheresistorafter theunitispowered.

If the battery discharges down to the HighV threshold, the charger starts fast

charging.Therefreshfeaturemaybetestedinthe0.5-Achargemodebyusing

a 7-Ω, 3-W resistor in parallel with a fully charged battery.

The circuit has an overvoltage comparator for added protection. If the battery

voltage exceeds this threshold for 330 ms, then the charger goes into fault

mode. This may be tested by connecting an external power supply in place of

the battery and adjusting the voltage above the threshold.

2.2.2 For Two-Cell Applications

Setuptheevaluationboardasdescribedabove,bymakingthenecessaryI/O

connections and jumper selections.

Note:

Before test and evaluation, it is important to verify that the maximum power

dissipation on the IC is not exceeded. Pmax = 2.3 W.

Pdiss, 2cell = (VI–6.8 V) ×ICHG where VI= VCC –0.1 V

Note:

Withatwo-cellbatterypackat6V, chargingat1A, theICpowerdissipation

istemporarilyashigh as3.1Wuntilthepack chargesto6.8V.Thiscondition

is acceptable for the short time before the pack reaches 6.8 V.

Adjust the input power supply for 9.1 V. The red LED should illuminate to

indicate charging, unless there is a fault or the battery is fully charged.

Questo manuale è adatto per i seguenti modelli

Indice

Altri manuali Texas Instruments Scheda madre

Texas Instruments

Texas Instruments DRV425 Manuale utente

Texas Instruments

Texas Instruments TPA3220EVM Manuale utente

Texas Instruments

Texas Instruments DLP LightCrafter Display 3310 Manuale utente

Texas Instruments

Texas Instruments BQ2430 Series Manuale utente

Texas Instruments

Texas Instruments AMC1210EVM Manuale utente

Texas Instruments

Texas Instruments ADS9224REVM-PDK Manuale utente

Texas Instruments

Texas Instruments TAS5825P Manuale utente

Texas Instruments

Texas Instruments TPS92515HVEVM-749 Manuale utente

Texas Instruments

Texas Instruments TPS3700EVM-202 Manuale utente

Texas Instruments

Texas Instruments DAC8534 Manuale utente

Texas Instruments

Texas Instruments TLC5929 Manuale utente

Texas Instruments

Texas Instruments AMC131M03EVM Manuale utente

Texas Instruments

Texas Instruments TPS563203 Manuale utente

Texas Instruments

Texas Instruments J721E Manuale utente

Texas Instruments

Texas Instruments ADC12DL3200 Manuale utente

Texas Instruments

Texas Instruments TRS3221RGTEVM Manuale utente

Texas Instruments

Texas Instruments TPA6020A2 Manuale utente

Texas Instruments

Texas Instruments ALM2403-Q1 Manuale utente

Texas Instruments

Texas Instruments TLV841EVM Manuale utente

Texas Instruments

Texas Instruments TPS55288EVM-045 Manuale utente

Texas Instruments

Texas Instruments ADS7861 EVM Manuale utente

Texas Instruments

Texas Instruments DEM-PCM2900 EVM Manuale utente

Texas Instruments

Texas Instruments TPS22921 Manuale utente

Texas Instruments

Texas Instruments LM36923HEVM Manuale utente

Manuali Scheda madre popolari di altre marche

DFI

DFI SD170 Manuale utente

ASROCK

ASROCK ROMED8-2T Manuale utente

Asus

Asus P2L97A Manuale utente

Winmate

Winmate IC70 Manuale utente

Asus

Asus MES-B Manuale utente

Grantech

Grantech SYS8F377VGGA-3OMN Manuale utente

Telit Wireless Solutions

Telit Wireless Solutions SL869-3DR Manuale utente

Gigabyte

Gigabyte GA-9IVDT Manuale utente

Commell

Commell MS-C73 Manuale utente

IBT Technologies

IBT Technologies MB860 Manuale utente

Nvidia

Nvidia TEGRA DG-04927-001_V01 Manuale utente

Biostar

Biostar M7VIT Bravo Istruzioni per l'uso e l'installazione

Intel

Intel D33217CK Manuale utente

Asus

Asus F1A55-M LX PLUS R2.0 Manuale utente

EPC

EPC EPC9147C Manuale utente

Asus

Asus EX-B760M-V5 D4 Manuale utente

EPOX

EPOX MU-8KHA0010 Manuale utente

Ski-Doo

Ski-Doo Bombardier MPEM 219 700 090 Manuale utente