Texas Instruments TPS61030EVM-029 User manual


 
October 2003
User’s Guide
SBVU006

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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:
This evaluation kit being sold by TI is intended for use 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.
Should this evaluation kit not meet the specifications indicated in the EVM User’s Guide, the kit may be returned
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, OR STATUTORY, INCLUDING ANY WARRANTY OF MERCHANTABILITY OR FITNESS FOR 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
received may not be regulatory compliant or agency certified (FCC, UL, CE, etc.). Due to the open construction
of the product, it is the user’s responsibility to take any and all appropriate precautions with regard to electrostatic
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’s Guide prior to handling the product. This notice contains important safety information about temperatures
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
It is important to operate this EVM within the specified input and output ranges described in
the EVM User’s Guide.
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.
Applying loads outside of the specified output range may result in unintended operation and/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.
During normal operation, some circuit components may have case temperatures greater than
60°C. The EVM is designed to operate properly with certain components above 60°C as long
as the input and output ranges are maintained. These components include but are not limited
to linear regulators, switching transistors, pass transistors, and current sense resistors. These
types of devices can be identified using the EVM schematic located in the EVM User’s Guide.
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
iii
Contents
Preface

About This Manual
This user’s guide describes the characteristics, operation, and use of the
TPS61030EVM-029 synchronous boost converter evaluation module (EVM).
This EVM features a Texas Instruments high-efficiency, single-cell Li-Ion,
dual-cell battery boost converter that is configured to deliver 5.0V at 1A with
an input voltage of 1.8V. This user’s guide includes setup instructions, a sche-
matic diagram, a bill of materials (BOM), characterization results, and printed
circuit board (PCB) layout drawings for the evaluation module.
How to Use This Manual
This document contains the following chapters:
-Chapter 1—Introduction
-Chapter 2—Setup
-Chapter 3—Board Layout
-Chapter 4—Schematic and Bill of Materials
Related Documentation From Texas Instruments
The following document provides information regarding Texas Instruments
integrated circuits used in the assembly of the TPS61030EVM-029. This
document is available from the TI web site. The last character of the litera-
ture number corresponds to the document revision, which is current at the
time of the writing of this User’s Guide. To obtain a copy of the following TI
document, visit our website at http://www.ti.com/ or call the Texas Instru-
ments Literature Response Center at (800) 477−8924 or the Product Infor-
mation Center at (972) 644−5580. When ordering, identify the document by
both title and literature number.
Data sheet Literature number
TPS61030 Data Sheet SLUS534

Contents
iv
If You Need Assistance
If you have questions regarding either the use of this evaluation module or
the information contained in the accompanying documentation, please con-
tact the Texas Instruments Product Information Center at (972) 644−5580,
visit the TI web site at www.ti.com, or contact your local TI sales represen-
tative.
FCC Warning
This equipment is intended for use in a laboratory test environment only. It
generates, uses, and can readiate 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 reason-
able protection against radio frequency interference. Operation of this
equipment in other environments may cause interface with radio commu-
nications, in which case the user at his own expense will be required to
take whatever measures may be required to correct this interference.

Contents
v
Contents

Introduction iii. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
About This Manual iii. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
How to Use This Manual iii. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Related Documentation From Texas Instruments iii. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
If You Need Assistance iv. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
FCC Warning iv. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Contents v. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figures vi. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Tables vi. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Introduction 1-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Setup 2-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.1 Input/Output Connector Descriptions 2-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.2 Setup 2-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.3 Operation 2-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Board Layout 3-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.1 Layout 3-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Schematic and Bill of Materials 4-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.1 Schematic 4-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.2 Bill of Materials 4-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Contents
vi

Figure 1. Efficiency vs IOUT for the TPS61030EVM 2-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 2. Maximum Output Current vs VBAT 2-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 3. Assembly Layer 3-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 4. Top Layer Routing 3-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 5. Bottom Layer Routing 3-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 6. TPS61030EVM-029 Schematic 4-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Table 1. TPS61030EVM-029 Bill of Materials 4-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1-1
Introduction

The Texas Instruments TPS61030EVM evaluation board helps designers
evaluate the operation and performance of the TPS61030 family of
high-frequency synchronous boost DC/DC converters.
This EVM is specifically designed and optimized to operate with 2-cell NiCad,
Ni-MH, or alkaline battery input. The default output voltage of this EVM is 5.0V.
If desired, this EVM can easily be modified to supply higher or lower output
voltages by adjusting the appropriate feedback resistor dividers. Also, other
fixed-output voltage versions of the devices can be easily evaluated using this
EVM. Refer to the TPS61030 data sheet (SLVS534) for the various
fixed-output voltage options available in the TPS6103x device family as well
as for more information on adjusting the output voltage.
Chapter 1

2-1
Setup

This chapter describes the jumpers and connectors on the EVM as well as how
to properly configure, set up, and use the TPS61030EM-029.
Topic Page
2.1 Input/Output Connector Descriptions 2-2. . . . . . . . . . . . . . . . . . . . . . . . . . .
2.2 Setup 2-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.3 Operation 2-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Chapter 2

Input/Output Connector Descriptions
2-2
2.1 Input/Output Connector Descriptions
2.1.1 J1—VBAT
This is the positive connection to the input power supply. The leads to the input
supply should be twisted and kept as short as possible to minimize EMI trans-
mission.
2.1.2 J2—GND
This is the return connection for the input power supply.
2.1.3 J3—VOUT
This is the positive connection from the output of the power supply. Connect
this pin to the positive input of the load.
2.1.4 J4—GND
This is the negative connection from the output of the power supply. Connect
this pin to the negative input of the load.
2.1.5 J5—LBO
The LBO pin is an open-drain output configured with a 1M pull-up resistor.
2.1.6 J6—GND
This is the ground connection for the LBO pin.
2.1.7 JP1—SYNC
This jumper enables or disables the power save mode at light loads. If SYNC
is connected to VBAT, the power save mode is disabled. Connecting SYNC to
GND enables the power save mode. When the SYNC pin is not connected to
VBAT or GND, the switch of the frequency of the device will synchronize to a
user-provided signal of 500kHz to 700kHz.
2.1.8 JP2—EN
This jumper enables and disables the TPS61030 on the EVM.
2.2 Setup
Connect an input supply between J1 and J2. The voltage range on this supply
should stay between 1.8V and 5.0V. Connect a load between J3 and J4. En-
able the output by positioning a jumper to connect the EN and ON pins. Config-
ure the SYNC jumper to the desired setting.

Operation
2-3
Setup
2.3 Operation
The EVM has been optimized to operate from a 2-cell NiCad, NiMH, and
alkaline battery with input voltage range down to 1.8V. The output voltage is
set to 5.0V and is capable of supplying 1A. After connecting the input and
output connections, and setting the SYNC jumper (JP1) to the desired
setting, turn on the input supply and then enable the output as desired with
JP2.
The resistor divider on the LBI pin is designed to trip the LBO output when
the input supply voltage drops below 1.8V.
Efficiency may vary depending on the inductor used in the design.
Generally, smaller size inductors decrease the efficiency in the design.
Figure 2−1 shows the efficiency versus IOUT curve for the TPS61030EVM.
Figure 2−1.Efficiency vs IOUT for the TPS61030EVM
0
100
90
80
70
60
50
40
30
20
10
1 10 100 1000 10000
Output Current (mA)
Efficiency
VIN =2.4
VIN =3.3
Figure 2−2 shows the typical maximum output current versus input voltage for
this EVM.
Figure 2−2.Maximum Output Current vs VBAT
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0
Input Voltage, VBAT (V)
Maximum Output Current (A)
1.82.22.63.03.43.84.24.65.0

3-1
Board Layout

This chapter provides the TPS61030EVM-029 board layout and illustrations.
Topic Page
3.1 Layout 3-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Chapter 3

3-2
3.1 Layout
Board Layout is critical for all switch mode power supplies. Figure 3−1,
Figure 3−2, and Figure 3−3 show the board layout for the
TPS61030EVM-029 PCB. The nodes with high switching frequencies and
currents are short and isolated from the noise sensitive feedback circuitry.
Careful attention has been given to the routing of high-frequency current
loops. Refer to the data sheet for specific layout guidelines.
Figure 3−1.Assembly Layer
Figure 3−2.Top Layer Routing

3-3
Board Layout
Figure 3−3.Bottom Layer Routing

4-1
Schematic and Bill of Materials
    
This chapter provides the TPS61030EVM-029 schematic and bill of materials.
Topic Page
4.1 Schematic 4-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.2 Bill of Materials 4-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Chapter 4

Schematic
4-2
4.1 Schematic
Figure 4−1.TPS61030EVM-029 Schematic
+ +

Bill of Materials
4-3
Schematic and Bill of Materials
4.2 Bill of Materials
Table 4−1. TPS61030EVM-029 Bill of Materials
Count Reference
Designator Description Size Manufacturer Mfg Part Number
1 C1 Capacitor, Ceramic, 10µF, 6.3V, X5R, ±10% 805 TDK C1608X5R1A105KT
1 C2 Capacitor, Ceramic, 2.2µF, 10V, X5R, ±20% 805 TDK C1005X7R1H472KT
2C3, C4 Capacitor, Low ESR Tantalum, 100µF,
16V, 270mΩ, 10% 7343 (D) Vishay 595D107X0016C2T
6 J1−J6 Header, 2-pin, 100 mil spacing (36-pin strip) 0.100 x 2 Sullins PTC36SAAN
2JP1, JP2 Header, 3-pin, 100 mil spacing (36-pin strip) 0.100 x 3 Sullins PTC36SAAN
1 L1 Inductor, SMT, 6.8µH, 4.9A, 23mΩ0.476 x
0.515 Sumida CDRH124-6R8
1 R1 Resistor, Chip, 475kΩ, 1/16W, 1% 603 Std Std
1 R2 Resistor, Chip, 182kΩ, 1/16W, 1% 603 Std Std
1 R3 Resistor, Chip, 1.8MΩ, 1/16W, 1% 603 Std Std
1 R4 Resistor, Chip, 200kΩ, 1/16W, 1% 603 Std Std
1 R6 Resistor, Chip, 1.0MΩ, 1/16W, 1% 603 Std Std
1 U1 IC, Synchronous Boost Converter
with 4A Switch QFN−16 Texas Instruments TPS61030RSA
1 −− PCB, 2.23in x 1.5in x .062in Any HPA029
2 −− Shunt, 100 mil (black) 0.100 3M 929950−00