Texas Instruments bq24013 User manual

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January 2003 PMP Portable Power
User’s Guide
SLUU132A

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,
copyright,maskworkright,orotherTIintellectualpropertyrightrelatingtoanycombination,machine,orprocess
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
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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
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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
Copyright 2003, Texas Instruments Incorporated

EVM IMPORTANT NOTICE
Texas Instruments (TI) provides the enclosed product(s) under the following conditions:
Thisevaluationkit being soldbyTI is intendedforuse for ENGINEERING DEVELOPMENT OR EVALUATION
PURPOSES ONLY and is not considered by TI to be fit for commercial use. As such, the goods being provided
may not be complete in terms of required design-, marketing-, and/or manufacturing-related protective
considerations, including product safety measures typically found in the end product incorporating the goods.
As a prototype, this product does not fall within the scope of the European Union directive on electromagnetic
compatibility and therefore may not meet the technical requirements of the directive.
ShouldthisevaluationkitnotmeetthespecificationsindicatedintheEVMUser’sGuide,thekitmaybereturned
within 30 days from the date of delivery for a full refund. THE FOREGOING WARRANTY IS THE EXCLUSIVE
WARRANTY MADE BY SELLER TO BUYER AND IS IN LIEU OF ALL OTHER WARRANTIES, EXPRESSED,
IMPLIED,ORSTATUTORY,INCLUDINGANYWARRANTY OF MERCHANTABILITYOR FITNESSFOR ANY
PARTICULAR PURPOSE.
The user assumes all responsibility and liability for proper and safe handling of the goods. Further, the user
indemnifies TI from all claims arising from the handling or use of the goods. Please be aware that the products
receivedmaynotberegulatorycompliant oragency certified (FCC,UL, CE,etc.). Dueto theopen construction
oftheproduct,itistheuser’sresponsibilitytotakeanyandallappropriateprecautionswithregardtoelectrostatic
discharge.
EXCEPT TO THE EXTENT OF THE INDEMNITY SET FORTH ABOVE, NEITHER PARTY SHALL BE LIABLE
TO THE OTHER FOR ANY INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES.
TI currently deals with a variety of customers for products, and therefore our arrangement with the user is not
exclusive.
TI assumes no liability for applications assistance, customer product design, software performance, or
infringement of patents or services described herein.
Please read the EVM User’s Guide and, specifically, the EVM Warnings and Restrictions notice in the EVM
User’sGuidepriortohandlingtheproduct.Thisnoticecontainsimportantsafetyinformationabouttemperatures
and voltages. For further safety concerns, please contact the TI application engineer.
Persons handling the product must have electronics training and observe good laboratory practice standards.
No license is granted under any patent right or other intellectual property right of TI covering or relating to any
machine, process, or combination in which such TI products or services might be or are used.
Mailing Address:
Texas Instruments
Post Office Box 655303
Dallas, Texas 75265
Copyright 2003, Texas Instruments Incorporated

EVM WARNINGS AND RESTRICTIONS
ItisimportanttooperatethisEVMwithintheinputvoltagerangeof5.6Vandtheoutputvoltage
range of 0 V and 4.25 V.
Exceeding the specified input range may cause unexpected operation and/or irreversible
damage to the EVM. If there are questions concerning the input range, please contact a TI
field representative prior to connecting the input power.
Applyingloadsoutsideofthespecifiedoutputrangemayresultinunintendedoperationand/or
possible permanent damage to the EVM. Please consult the EVM User’s Guide prior to
connecting any load to the EVM output. If there is uncertainty as to the load specification,
please contact a TI field representative.
Duringnormaloperation,somecircuitcomponentsmayhavecasetemperaturesgreaterthan
60°C.TheEVM isdesignedto operateproperlywith certaincomponentsabove 60°C aslong
astheinputandoutput rangesare maintained.Thesecomponentsincludebut arenot limited
tolinearregulators,switchingtransistors,passtransistors,andcurrentsenseresistors.These
typesof devicescanbeidentifiedusingtheEVM schematiclocated intheEVMUser’sGuide.
When placing measurement probes near these devices during operation, please be aware
that these devices may be very warm to the touch.
Mailing Address:
Texas Instruments
Post Office Box 655303
Dallas, Texas 75265
Copyright 2003, Texas Instruments Incorporated

Contents
v
Contents
1 Introduction 1-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.1 Background 1-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.2 Performance Specification Summary 1-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2 Test Summary 2-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.1 I/O and Jumper Connections 2-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.2 Test Procedure 2-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.2.1 Equipment 2-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.2.2 Equipment Setup 2-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.2.3 Procedure 2-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3 Schematic, Physical Layouts, and Bill of Materials 3-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.1 Schematic 3-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.2 Physical Layouts 3-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.2.1 Board Layout 3-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.3 Bill of Materials 3-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.4 Reference 3-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figures
2–1 Load Test Board 2-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3–1 EVM Schematic Diagram 3-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3–2 Assembly View 3-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3–4 Top Layer 3-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3–5 Bottom Layer 3-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Tables
1–1 Performance Specification Summary 1-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3–1 Bill of Materials 3-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Contents
vi

1-1
Introduction
This user’s guide describes the bq24013 (bqTINY) evaluation module. The
EVM provides a convenient method for evaluating the performance of a
charge-management solution for portable applications using the bq24013
product family. A complete designed and tested charger is presented. The
charger is designed to deliver up to 1.0 A of continuous charge current, but is
programmed for 0.7 A, for single-cell Li-Ion or Li-Pol applications using a dc
power supply.
Topic Page
1.1 Background 1-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.2 Performance Specification Summary 1-2. . . . . . . . . . . . . . . . . . . . . . . . . . .
Chapter 1
bqTINY is a trademark of Texas Instruments.

Background
1-2
1.1 Background
The bqTINY series are highly integrated Li-Ion and Li-Pol linear
charge-management devices targeted at space-limited portable applications.
Ina small package,thebqTINY series offerintegrated PowerFET andcurrent
sensor, reverse blocking diode,high-accuracycurrentandvoltageregulation,
charge status, and charge termination.
The bqTINY charges the battery in three phases: conditioning, constant
current, and constant voltage. Charge terminates on the basis of minimum
current. An internal charge-timer provides backup safety for charge
termination. The bqTINY automatically restarts the charge if the battery
voltage falls below an internal threshold and automatically enters sleep mode
when VCC supply is removed.
In addition to the standard features, different versions of the bqTINY offer a
multitude of additional features. These features include temperature-sensing
inputfordetectinghotorcoldbatterypacks,powergood(PG)outputindicating
thepresenceoftheacadapter,aTTL-levelchargeenableinput(CE)todisable
or enable the charge process, and a TTL-level timer and termination enable
(TTE)input to disableorenablethe fast-charge timer andchargetermination.
1.2 Performance Specification Summary
This section summarizes the performance specifications of the EVM.
Table 1–1 gives the performance specifications of the EVM.
Table 1–1.Performance Specification Summary
Specification Test Conditions Min Typ Max Units
Input dc voltage, VI(DC) VREG+0.5 5.0 5.2†V
Battery charge current, IO(CHG) See note 0.7 1 A
Power dissipation (V(DC+) –V(BAT+)) ×I(CHG) 1.5 W
†This input voltage maximum is a function of the maximum allowable power dissipation on the IC. The current level is pro-
grammed for 0.7 A. If the programmed charge is changed, then the maximum input voltage must be adjusted.
PmaxIC = 1.5 Watt = ICHG(VDC+ –VBAT+).

2-1
Test Summary
Test Summary
This chapter describes the test setups used and the tests performed in evalu-
ating the EVM.
Setup:Thebq24013EVMboardrequiresasingle-cellLi-Ionor Li-Pol battery
pack and a 5-VDC, 1-A power source to provide input power. The test setup
connections and jumper setting selections are configured for a stand-alone
evaluation but can be changed to interface with external hardware, such as a
microcontroller.
Topic Page
2.1 I/O and Jumper Connections 2-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.2 Test Procedure 2-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Chapter 2

I/O and Jumper Connections
2-2
2.1 I/O and Jumper Connections
Jack Connect To:
J1–DC+ Power supply positive, preset to 5.0VDC, 1-A current limit
J1–DC–Power supply ground
J2–BAT+ Positive battery pack terminal
J2–BAT–Negative battery pack terminal
J2–TTE NC required—pulled down with 10 kΩresistor on EVM
J2–BAT–NC
J3–STAT1 External hardware if J4-EXT is jumpered (not jumpered fromfactory)
J3–STAT2 External hardwareifJ5-EXT is jumpered(notjumpered fromfactory)
J3–DC–Return for J3 signals
J3–/CE NC required—pulled down with 10-kΩresistor on EVM
J4 (Jumper) STAT1 indication location –LED (EVM) | EXT
J5 (Jumper) STAT2 indication location –LED (EVM) | EXT
2.2 Test Procedure
Setuptheevaluationboardasdescribedabove,bymakingthenecessaryI/O
connections and jumper selections. Before test and evaluation, it is
important to verify that the maximum power dissipation on the IC is not
exceeded: P(MAX) = 1.5 watts.
1) Turn on the power supply, which was preset to 5.0 VDC and 1 A for the
current-limit setting.
2) The bq24013 enters preconditioning mode if the battery is below the
V(LOWV)threshold.Inthismode,thebq24013prechargesthebatterywith
a low current (typically IO(CHG)/10 = 0.7A/10 = 70 mA) until the battery
voltage reaches the V(LOWV) threshold or until the precharge timer
expires. If the timer expires, then the charge current is terminated, the
bq24013 enters fault mode, and both LEDs turn off. Toggling input power
or battery replacement resets fault mode.
3) Once the battery voltage is above the V(LOWV) threshold, the battery
enters fast-charge mode. This EVM is programmed for 0.7 A of
fast-charging current.
4) Once the battery reaches voltage regulation (4.2 V), the current tapers
down as the battery reaches its full capacity.
5) The battery remains at the fast-charge mode until the fast-charge timer
expires,thechargetapertimeexpires,orthechargeterminationthreshold
is reached.
6) If the battery discharges to the recharge threshold, the charger starts fast
charging.
In place of a battery, a source meter that can sink current can easily be
adjusted to test each mode.

Test Procedure
2-3
Test Summary
Another way to briefly see each mode on a scope is to connect a 1-mF
capacitor and a 10-kΩresistor on the output in place of a battery to observe
the power-up and cycling between voltage regulation and fast charge via the
refresh threshold.
Note:
Because of the battery-detection circuit, it is not possible to switch-in static
load resistors to jump between regulation and constant-current modes. An
alternate procedure described below uses a dynamic load to replace the
battery circuit. That procedure allows testing of each mode.
This is an alternative way of testing the EVM using a dynamic load board in
place of a battery. The circuit is adjusted to work with the displayed parts and
their inherent thresholds. The sequence of the test procedure is important
becauseof the active battery-detectioncircuit,refreshfeature,and precharge
and fast-charge current levels (switching load in or out has different results in
different modes). No damage should occur, but results might be differentthan
anticipated if the procedure is altered.
2.2.1 Equipment
1) Power source: current-limited 5-V lab supply with its current limit set to
1.0 A ±0.1 A
2) Two Fluke 75, equivalent or better
3) Oscilloscope –TDS220 or better
4) Load test board (Figure 2–1)
Figure 2–1.Load Test Board
C1
2000 µF
25 V
8
Power Supply
5.1 V ±0.1 V
Current Limit
1 A ±0.1 A
+
–
DMM DC+
DC–
UUT
bq24013 EVM
BAT+
BAT–
BAT+
BAT–
DMM
Volts S4
R3
3 kΩ
0.25 W
S1
R6
10 kΩ
0.25 W
S2
R4
66.5 Ω
0.25 W
765
R5
66.5 Ω
0.25 W
Q1
Si4410DY
321
D1
1N4148
S3
R7
10 kΩ
0.25 W
8 7 6 5
Q2
Si4410DY
3 2 1
44
R1
5 Ω
5 W

Test Procedure
2-4
2.2.2 Equipment Setup
1) Connect the load board to the BAT+ and BAT–. Set SW1 through SW4 in
the closed position.
2) Connect a voltage meter to the BAT+/BAT–output to monitor the output
voltage (range 0 to 5 V).
3) Setthelabsupplyfor5.1V±0.1VDC,1.0±0.1Acurrentlimit,andthenturn
off the supply. Connect the source supply to a current meter and to J1,
noting polarity. (You may use an internal source current meter if it has 5%
or better accuracy.)
4) Install shunt jumpers on the LED pins 1 and 2 of each header J4 and J5.
2.2.3 Procedure
1) Ensure that equipment setup steps are followed. (Switches should be in
the closed position, shunts installed, and power source set to 5.1 V/±0.1
V.) Turn on the power source.
2) Verify that output voltage BAT+ charges up to between 2.5 V and 2.9 V,
and the red LED (D1) is lit.
3) Open switch SW2 and then close swtch SW2.
4) Verify that output voltage BAT+ settles between 3.2 V and 3.95 V.
5) Verify that the input current is between 0.69 A and 0.75 A.
6) Open switch SW3.
7) Verify that the input current is between 100 mA and 150 mA.
8) Verify the output voltage BAT+ is between 4.150 V and 4.250 V.
9) Open switch SW2.
10) Verify with a scope (250 ms/div, 1 V/div) that output BAT+ charges and
discharges are between the maximum limits of 3 V and 4.35 V, with a
period of between 600 ms and 850 ms.
11) VerifythattheLEDsflash betweenRED(D1)andGREEN (D2),mostlyon
green.
12) Open switch SW4, and verify that D1 and D2 are off.
13) Verify,withascope on BAT+, a square wave between the maximum limits
of 1.3 VDC and 4.35 VDC and a frequency between 3.5 Hz and 4.5 Hz.
This step verifies operation of the battery-detect circuit and the
internal-timer oscillator.
14) Turnoffthepowersourceandsetallswitches,SW1throughSW4,closed.
15) The EVM is good if all tests are passed.

3-1
Schematic, Physical Layouts, and Bill of Materials
Schematic, Physical Layouts, and
Bill of Materials
Thischaptercontainstheschematicdiagram,theboardlayoutsandassembly
drawings, and the bill of materials required for the EVM.
Topic Page
3.1 Schematic 3-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.2 Physical Layouts 3-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.3 Bill of Materials 3-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.4 Reference 3-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Chapter 3

Schematic
3-2
3.1 Schematic Figure 3–1.EVM Schematic Diagram
1
DC+
J1
DC–2
R1
1.5 kΩ
D1
Red D2 Green
R2
1.5 kΩ
C3
0.47 µF
U1
bq24013
OUTIN
110
PWP
BATVCC
29
STAT1
38
CESTAT2
47
ISETVSS
56
11 R3
1R6
10 kΩ
C1
1 µF
10 V
TP1
TP2
R4
1.13 kΩ
C2
1 µF
10 V
1
4
3
2
1
BAT+
BAT–
TTE
BAT–
J2
J3
1
2
3
4
STAT1
STAT2
DC–
CE
LED EXT
STAT2 JUMPER
LED EXT
STAT1 JUMPER
Not installed
1
1 2 3J5 1 2 3J4
R5
10 kΩ
TTE

Physical Layouts
3-3
Schematic, Physical Layouts, and Bill of Materials
3.2 Physical Layouts
3.2.1 Board Layout
Figure 3–2 shows the assembly view of the EVM. Figure 3–3 shows the top
layer. Figure 3–4 shows the bottom layer.
Figure 3–2.Assembly View

Physical Layouts
3-4
Figure 3–3.Top Layer
Figure 3–4.Bottom Layer

Bill of Materials
3-5
Schematic, Physical Layouts, and Bill of Materials
3.3 Bill of Materials
Table 3–1 lists materials required for the EVM.
Table 3–1.Bill of Materials
Item# bq24013 Ref
Des Description Size MFR Part Number
1 0 C1 Capacitor, ceramic, X5R, 1 µF, 10 V 805 Panasonic ECJ-2YB1A105K
2 1 C2 Capacitor, ceramic, X5R, 1 µF, 10 V 805 Panasonic ECJ-2YB1A105K
3 1 C3 Capacitor, ceramic, X7R, 0.47 µF, 16 V 805 Panasonic ECJ-2YB1C474K
4 1 D1 Diode, LED, red, 1.8 V, 20 mA, 20 mcd 603 Lite-On 160-1181-1-ND
5 1 D2 Diode, LED, green, 2.1 V, 20 mA, 6 mcd 603 Lite-On 160-1183-1-ND
6 1 J1 Terminal block, 2 pin, 6 A, 3,5 mm 0.27 ×0.25 OST ED1514
7 2 J2, J3 Terminal block, 4 pin, 6 A, 3,5 mm 0.55 ×0.25 OST ED1516
8 2 J4, J5 Header, 3 pin, 100 mil spacing, (36-pin
strip) 0.100 ×3 Sullins PTC36SAAN
9 2 R1, R2 Resistor, chip, 1.5 kΩ, 1/16 W, 1% 603 Std Std
10 0 R3 Resistor, chip, 1 MΩ, 1/16 W, 1% 602 Std Std
11 2R5, R6 Resistor, chip, 10 kΩ, 1/16 W, 1% 603 Std Std
12 1 R4 Resistor, chip, 1.3 kΩ, 1/16 W, 1% 603 Std Std
13 1 U1 IC, single Li-Ion/Li-Polymer, charge
manager MLP10 TI bq24013DRC
14 2 —Shunt, 100-mil, black 0.100 3M 929950-00
15 1 —PCB, bq24010/2, 1.6 in ×1.3 in ×0.031 in Any SLUP185
Notes: 1) These assemblies are ESD sensitive; ESD precautions must be observed.
2) These assemblies must be clean and free from flux and all contaminants. Use of no-clean flux is not acceptable.
3) These assemblies must comply with workmanship standards IPC-A-610 Class 2.
4) Reference designators marked with an asterisk (**) cannot be replaced by substitutes. All other components can
be replaced with equivalent manufacturer components.
3.4 Reference
1) bq2401x data sheet (SLUS530)