Texas Instruments TPS61007EVM-177 User manual

TPS61007EVM-177
EVM User's Guide for HighĆEfficiency,
Boost Con erters
October 2000 Power Management Products
User’s Guide
SLVU039

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Copyright 2000, Texas Instruments Incorporated

iii
Read This First
Preface
About This Manual
This user’s guide describes the TPS61007EVM-177 (SLVP177) evaluation
module for high-efficiency boost converters.
How to Use This Manual
- Chapter 1 Introduction
- Chapter 2 Evaluation With the TPS61007EVM-177
- Chapter 3 Printed Circuit Board (PCB) Layout
Information About Cautions and Warnings
This book may contain cautions and warnings.
This is an example of a caution statement.
A caution statement describes a situation that could potentially
damage your software or equipment.
This is an example of a warning statement.
A warning statement describes a situation that could potentially
cause harm to you.
The information in a caution or a warning is provided for your protection.
Please read each caution and warning carefully.
Related Documentation From Texas Instruments
- TPS61007 data sheet (literature number SLVS279)

iv

Running Title—Attribute Reference
v
Chapter Title—Attribute Reference
Contents
1 Introduction 1–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.1 SLVP177 EVM Schematic 1-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.2 SLVP177 Bill of Materials 1-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.3 Setup of the EVM 1-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2 Evaluation With the TPS61007EVM-177 2-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.1 Enable (EN) Jumper 2-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.2 LBI/LBO Comparator 2-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3 PCB Layout 3-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.1 PCB Layout of the TPS61007EVM-177 3-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Running Title—Attribute Reference
vi
Figures
1–1 SLVP177 EVM Schematic Diagram 1-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3–1 Component Placement 3-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3–2 Top Layer 3-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3–3 Bottom Layer 3-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Tables
1–1 SLVP177 EVM Bill of Materials 1-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1-1
Introduction
Introduction
The Texas Instruments TPS61007 evaluation module (EVM) helps designers
evaluatethedifferentoperatingmodesandtheperformanceofhigh-efficiency
boost converters.
The TPS61007EVM-177 is an adjustable boost converter whose output
voltage is set to 3.3 V. If any other output voltage needs to be evaluated, the
TPS61007EVM-177canbeeasilysetuptoprovideanoutputvoltagebetween
1.5 V and 3.3 V by modifying the external resistor divider.
The TPS61007 has an input voltage range between 0.9 V and VO. The
maximum output current is at least 100 mA from 0.9-V input voltage (one
batterycellinput) and250mA from1.8-Vinput voltage(twobattery cellinput).
Topic Page
1.1 SLVP177 EVM Schematic 1–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.2 SLVP177 Bill of Materials 1–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.3 Setup of the EVMs 1–3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Chapter 1

SLVP177 EVM Schematic
1-2
Introduction
1.1 SLVP177 EVM Schematic
Figure1–1 shows the SLVP177 EVM schematic diagram.
Figure 1–1.SLVP177 EVM Schematic Diagram
C1
R5
R6
J1 GND
L1
DS1
LBO
FB
FBGND
COMP
VOUT
EN
LBI
GND
SW
VBAT
TPS61007
C4
INPUT
R1
R2
R3
C2 C3
LBO
R4 OUTPUT
C5
1.2 SLVP177 Bill of Materials
Table 1–1 lists materials required for the SLVP177 EVM.
Table 1–1.SLVP177 EVM Bill of Materials
Ref Des Qty Part Number Description MFG
C1 1 C3216X5R0J106 Capacitor, 10 µF, X5R, 6.3 V, SMD 1206 TDK
C2 1Capacitor, 10 pF, X7R, SMD 0805
C3 1Capacitor, 10 nF, X7R, SMD 0805
C4 1 C4532X5R1A226M Capacitor, 22 µF, X5R, 6.3 V, SMD 1812 TDK
C5 Not Used
DS1 1 MBRM120LT3 Diode, Schottky, DO216AA ON Semiconductor
GND, LBO 2Test points
INPUT,
OUTPUT 2Header 1 x 4, 0.1” pitch
J1 1Header 1 x 3, 0.1” pitch, with jumper
L1 1 CDRH6D38-100 Coil Sumida
R1 1 Resistor, 100 kΩ, 1%, SMD 0805
R2, R4 1Resistor, 1 MΩ, 1%, SMD 0805
R3 1Resistor, 180 kΩ, 1%, SMD 0805
R5 1Resistor, 390 kΩ, 1%, SMD 0805
R6 1Resistor, 470 kΩ, 1%, SMD 0805
U1 1 TPS61007DGS IC, high-efficiency boost converter,
adjustable version, MSOP10 Texas Instruments

Setup of the EVM
1-3
Introduction
1.3 Setup of the EVM
Itis important toestablish all connections to the EVM before the power supply
connected to the EVM is turned on.
1) Connect a power supply (0.9 V to VO, depending on the output voltage of
the EVM) to the INPUT header.
2) Connect a voltmeter to the OUTPUT header.
3) Verify that the jumper, J1, is set to EN.
4) Turn on the power supply and verify the output voltage.

1-4
Introduction

2-1
Evaluation With the TPS61007EVM-177
Evaluation With the TPS61007EVM-177
This chapter details the evaluation process and features of the EVM. For this
evaluation,aloadisconnectedtotheoutputterminalinordertoadjusttheload
current between 0 mA and 250 mA.
For accurate output voltage and input voltage measurements, it is important
to measure the voltage on the input and output voltage terminals with kelvin
contacts or with a voltmeter connected directly to the input voltage or output
voltage terminals. This will eliminate any measurement errors related to
voltage drops along the input and output terminal wires connected to the
power supply or load.
TheEVMhasadditionalpinstoallowtheusertoassembleanadditionaloutput
capacitor, C5, onto the PCB for further evaluation purposes.
Topic Page
2.1 Enable (EN) Jumper 2–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.2 LBI/LBO Comparator 2–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Chapter 2

Enable (EN) Jumper
2-2
Evaluation With the TPS61007EVM-177
2.1 Enable (EN) Jumper
Thisjumperenablesthedevice.ConnectingtheENpintoVBAT(i.e.settingthe
jumper to EN) will enable the part.
2.2 LBI/LBO Comparator
The LBO terminal is an open drain output and has a pullup resistor, R4,
connected to the output. The signal on this pin will go low as soon as the input
voltage at LBI falls below the threshold of 500 mV. LBO will stay at high
impedance when the input voltage at LBI is above the threshold. A resistor
divider(R5,R6)isusedontheEVMtomonitorthesupplyvoltage.As adefault
on the EVM, the LBO output will go low when the supply voltage falls below
0.9V.Moredetailsaboutsettingthelowbatterythresholdvoltagecanbefound
in the data sheet (SLVS279).

3-1
PCB Layout
PCB Layout
Just as for all switch mode power supplies, the PCB layout is a critical step in
thepowersupplydesignprocess.Thefollowingfiguresshowthelayoutforthe
adjustable and fixed output voltage EVMs. Refer to the data sheet (SLVS279)
for further layout guidelines. The required board area for the complete dc-dc
converter solution is less than 418 mm2(19 mm x 21 mm) on a double-sided
PCB, as indicated by the rectangle on the component placement figure.
Topic Page
3.1 PCB Layout of the TPS61007EVM-177 3–2. . . . . . . . . . . . . . . . . . . . . . . . . .
Chapter 3

PCB Layout of the TPS61007EVM-177 (SLVP177)
3-2
PCB Layout
3.1 PCB Layout of the TPS61007EVM-177 (SLVP177)
Figure 3–1.Component Placement
Figure 3–2.Top Layer

PCB Layout of the TPS61007EVM-177 (SLVP177)
3-3
PCB Layout
Figure 3–3.Bottom Layer

3-4
PCB Layout