User’s Guide
October 2003
SBVU006
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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
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As a prototype, this product does not fall within the scope of the European Union directive on electromagnetic
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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
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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.
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Copyright 2003, Texas Instruments Incorporated
About This Manual
Contents
Preface
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 schematic 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 literature 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 Instruments Literature Response Center at (800) 477−8924 or the Product Information 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
iii
Contents
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 contact 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 representative.
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 reasonable protection against radio frequency interference. Operation of this
equipment in other environments may cause interface 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.
iv
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
v
Contents
Figure 1. Efficiency vs I
Figure 2. Maximum Output Current vs V
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. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
for the TPS61030EVM 2-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
OUT
BAT
Table 1. TPS61030EVM-029 Bill of Materials 4-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
vi
Chapter 1
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.
Introduction
1-1
Chapter 2
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. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Setup
2-1
Input/Output Connector Descriptions
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 transmission.
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
2.1.6 J6—GND
2.1.7 JP1—SYNC
2.1.8 JP2—EN
2.2 Setup
The LBO pin is an open-drain output configured with a 1M pull-up resistor.
This is the ground connection for the LBO pin.
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.
This jumper enables and disables the TPS61030 on the EVM.
Connect an inpu t s u pply 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. Enable the output by positioning a jumper to connect the EN and ON pins. Configure the SYNC jumper to the desired setting.
2-2
2.3 Operation
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 I
curve for the TPS61030EVM.
OUT
Figure 2−1.Efficiency vs I
Efficiency
for the TPS61030EVM
OUT
100
90
80
70
60
50
40
30
20
10
0
1 10 100 1000 10000
Output Current (mA)
Figure 2−2 shows the typical maximum output current versus input voltage for
this EVM.
Figure 2−2.Maximum Output Current vs V
3.5
VIN=3.3
VIN=2.4
BAT
3.0
2.5
2.0
1.5
1.0
Maximum Output Current (A)
0.5
0
1.82.22.63.03.43.84.24.65.0
Input Voltage, V
BAT
(V)
Setup
2-3
Chapter 3
This chapter provides the TPS61030EVM-029 board layout and illustrations.
Topic Page
3.1 Layout 3-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Board Layout
3-1
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
3-2
Figure 3−3.Bottom Layer Routing
Board Layout
3-3
Chapter 4
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. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Schematic and Bill of Materials
4-1
Schematic
4.1 Schematic
Figure 4−1.TPS61030EVM-029 Schematic
+ +
4-2
4.2 Bill of Materials
Table 4−1. TPS61030EVM-029 Bill of Materials
Reference
Count
Designator
1 C1 Capacitor, Ceramic, 10µF, 6.3V, X5R, ±10% 805 TDK C1608X5R1A105KT
1 C2 Capacitor, Ceramic, 2.2µF, 10V, X5R, ±20% 805 TDK C1005X7R1H472KT
2 C3, C4 Capacitor, Low ESR Tantalum, 100µF,
6 J1−J6 Header, 2-pin, 100 mil spacing (36-pin strip) 0.100 x 2 Sullins PTC36SAAN
2 JP1, JP2 Header, 3-pin, 100 mil spacing (36-pin strip) 0.100 x 3 Sullins PTC36SAAN
1 L1 Inductor, SMT, 6.8µH, 4.9A, 23mΩ 0.476 x
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
1 −− PCB, 2.23in x 1.5in x .062in Any HPA029
2 −− Shunt, 100 mil (black) 0.100 3M 929950−00
Description Size Manufacturer Mfg Part Number
16V, 270mΩ, 10%
with 4A Switch
Bill of Materials
7343 (D) Vishay 595D107X0016C2T
0.515
QFN−16 Texas
Sumida CDRH124-6R8
TPS61030RSA
Instruments
Schematic and Bill of Materials
4-3
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