Texas Instruments TPS6101xEVM-157 User manual

TPS6101xEVMĆ157
EVM User's Guide for HighĆEfficiency,
Boost Con erters
October 2000 Power Management Products
User’s Guide
SLVU040

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Copyright 2000, Texas Instruments Incorporated

iii
Read This First
Preface
About This Manual
This user’s guide describes the TPS6101xEVM-157 (SLVP157) evaluation
module for high-efficiency boost converters.
How to Use This Manual
- Chapter 1 Introduction
- Chapter 2 Evaluation With the TPS6101xEVM-157
- 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
- TPS6101x data sheet (literature number SLVS314)

iv

Running Title—Attribute Reference
v
Chapter Title—Attribute Reference
Contents
1 Introduction 1–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.1 SLVP157 EVM Schematic 1-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.2 SLVP157 EVMs Available 1-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.3 SLVP157 Bill of Materials 1-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.4 Setup of the EVM 1-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2 Evaluation With the TPS6101xEVM-157 2-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.1 Enable (EN) Jumper 2-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.2 Auto Discharge Enable (ADEN) Jumper 2-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.3 LBI/LBO Comparator 2-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3 PCB Layout 3-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.1 PCB Layout of the TPS6101xEVM-157 3-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Running Title—Attribute Reference
vi
Figures
1–1 SLVP157 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 Orderable EVMs 1-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1–2 SLVP157 EVM Bill of Materials 1-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1-1
Introduction
Introduction
The Texas Instruments TPS61010 to TPS61016 evaluation modules (EVM)
helps designers evaluate the different operating modes and the performance
of high-efficiency boost converters. Refer to Table 1–1 for the various EVMs
available in this family.
If any other output voltage is to be evaluated, the TPS61010 adjustable
version can be set up to provide an output voltage between 1.5 V and 3.3 V.
Only the feedback resistor divider has to be adjusted. Also, other fixed output
voltage versions of the devices can be easily evaluated using the EVM. Refer
to the data sheet (SLVS314) for the various fixed output voltage options
available in the TPS6101x device family.
The TPS6101x has an input voltage range between 0.9 V and VO. The
maximum output current is at least 100 mA depending on the input voltage.
Topic Page
1.1 SLVP157 EVM Schematic 1–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.2 SLVP157 EVMs Available 1–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.3 SLVP157 Bill of Materials 1–3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.4 Setup of the EVMs 1–4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Chapter 1

SLVP157 EVM Schematic
1-2
Introduction
1.1 SLVP157 EVM Schematic
Figure1–1 shows the SLVP157 EVM schematic diagram.
Figure 1–1.SLVP157 EVM Schematic Diagram
VBAT
GND
R4
R1
R2
R3
LBO
C4 C5
J2
J1
C1
R6
R5
INPUT
L1
C3
OUTPUT
ADEN
LBO
FB
COMP
GND
LBI
EN
SW
TPS6101x C2
VOUT
1.2 SLVP157 EVMs Available
Table 1–1 lists the various EVMs available in the TPS6101xEVM-157 family.
Table 1–1.SLVP157 Orderable EVMs
EVM Number Description
TPS61010EVM-157 Adjustable output voltage, set to 3.3 V
TPS61013EVM-157 2.5-V fixed output voltage
TPS61015EVM-157 3-V fixed output voltage
TPS61016EVM-157 3.3-V fixed output voltage

SLVP157 Bill of Materials
1-3
Introduction
1.3 SLVP157 Bill of Materials
Table 1–2 lists materials required for the SLVP157 EVM. More details about
the design and component selection for the dc-dc converter can be found in
the data sheet (SLVS314).
Table 1–2.SLVP157 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
J1, J2 1Header 1 x 3, 0.1” pitch, with jumper
L1 1 CDRH6D38-100 Coil Sumida
R1 1 Resistor, 100 kΩ, 1%, SMD 0805
R2 1Resistor, 1 M0, 1%, SMD 0805
Not used with fixed output voltage versions
R3 1Resistor, 180 kΩ, 1%, SMD 0805
Not used with fixed output voltage versions
R4 1Resistor, 1 M0, 1%, SMD 0805
R5 1Resistor, 390 kΩ, 1%, SMD 0805
R6 1Resistor, 470 kΩ, 1%, SMD 0805
GND, LBO 2Test points
INPUT,
OUTPUT 2Header 1 x 4, 0.1” pitch
U1 1TPS61010DGS IC, high-efficiency boost converter,
adjustable version, MSOP10 Texas Instruments
TPS61013DGS IC, high-efficiency boost converter,
2.5-V fixed output voltage version, MSOP10 Texas Instruments
TPS61015DGS IC, high-efficiency boost converter,
3-V fixed output voltage version, MSOP10 Texas Instruments
TPS61016DGS IC, high-efficiency boost converter,
3.3-V fixed output voltage version, MSOP10 Texas Instruments

Setup of the EVMs
1-4
Introduction
1.4 Setup of the EVMs
Itis importantto establishall connectionsto the EVMbefore thepower 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) Verify that the jumper, J2, is set to TBD.
5) Turn on the power supply and verify the output voltage.

2-1
Evaluation With the TPS6101xEVM-157
Evaluation With the TPS6101xEVM-157
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 Auto Discharge Enable (ADEN) Jumper 2–2. . . . . . . . . . . . . . . . . . . . . . . . .
2.3 LBI/LBO Comparator 2–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Chapter 2

Enable (EN) Jumper
2-2
Evaluation With the TPS6101xEVM-157
2.1 Enable (EN) Jumper
This jumper is used to enable the device. Connecting the EN pin to VBAT (i.e.
setting jumper to EN) will enable the part.
2.2 Auto Discharge Enable (ADEN) Jumper
This jumper enables the device to discharge the output capacitor after the
deviceisdisabledbysettingENtoGND.IfADENisconnectedtoVBAT(jumper
set to ADEN), the capacitors connected to VOUT will be discharged by an
internal switch with a resistance of 300 Ω. The discharge time depends on the
total output capacitance. The residual output voltage will be less than 0.4 V
after auto discharge.
When disabling the auto discharge function with the jumper, the output
capacitors will only be discharged by the load and/or by the leakage currents
in every connected part.
2.3 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 (SLVS314).

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 (SLVS314)
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 TPS61010EVM-157 3–2. . . . . . . . . . . . . . . . . . . . . . . . . .
Chapter 3

PCB Layout of the TPS6101xEVM-157 (SLVP157)
3-2
PCB Layout
3.1 PCB Layout of the TPS6101xEVM-157 (SLVP157)
Figure 3–1.Component Placement
Figure 3–2.Top Layer

PCB Layout of the TPS6101xEVM-157 (SLVP157)
3-3
PCB Layout
Figure 3–3.Bottom Layer

3-4
PCB Layout