TI1 GRM188R61C475KAAJ Tps8125xevm Datasheet

User's Guide
SLVU653 – April 2012
TPS8125xEVM
This user's guide describes the characteristics, operation, and use of the TPS8125x evaluation module
(EVM). This EVM enables test and evaluation of Texas Instruments' TPS8125x devices, a series of
4.5-MHz, step-up DC-DC converters. This user's guide includes EVM specifications, a schematic diagram,
a bill of materials, and board layout images.
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Contents
Introduction ..................................................................................................................
1.1
Requirements .......................................................................................................
1.2
Applications .........................................................................................................
1.3
EVM Features ......................................................................................................
1.4
EVM Ordering Options ............................................................................................
TPS8125xEVM Schematic .................................................................................................
Connector and Test Point Descriptions ..................................................................................
3.1
Connectors ..........................................................................................................
3.2
Other Connectors ..................................................................................................
3.3
Jumpers .............................................................................................................
TPS8125xEVM Printed Circuit Board Layout ...........................................................................
Bill of Materials ..............................................................................................................
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List of Figures
1
TPS8125xEVM Schematic ................................................................................................. 3
2
TPS8125xEVM Component Placement .................................................................................. 5
3
TPS8125xEVM Top Copper ............................................................................................... 6
4
TPS8125xEVM Inner Layer 1 ............................................................................................. 7
5
TPS8125xEVM Inner Layer 2 ............................................................................................. 8
6
TPS8125xEVM Bottom Copper ........................................................................................... 9
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1
Introduction
1
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Introduction
The TPS8125x device is an ideal power-supply solution for products powered by either a three-cell
alkaline, NiCd or NiMH battery, or a single-cell Li-Ion or Li-polymer battery. The wide input voltage range
is well-suited for portable power applications such as mobile phones or computer peripherals.
1.1
Requirements
The TPS8125xEVM is designed to produce a fixed output voltage over the full input voltage range. See
Table 1 for fixed output voltage version options. A DC power supply capable of delivering 2.50 V to 4.85 V
is required to operate this EVM. Please reference the device datasheet for the Recommended Operating
Conditions and Absolute Maximum Ratings.
1.2
Applications
•
•
•
•
•
1.3
EVM Features
•
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•
•
•
1.4
USB Host Supplies from a Single Li-Ion Battery
USB Dedicated Charging Port Supply
Li-Ion Applications
Audio Applications
RF-PA Buffers
91% Efficiency at 4.5 MHz
VIN Range from 2.50 V to 4.85 V
0.85 μA Quiescent Current in Shutdown Mode
30 μA Quiescent Current in Normal Operation
VIN > VOUT operation for Vin up to 5.5V
EVM Ordering Options
Table 1 provides the ordering Information for the various EVM options.
Table 1. TPS8125x Output Voltage Options and Ordering Information
2
Orderable EVM Number
Device Part Number
Output Voltage
PWR121-001
TPS81256
5V
TPS8125xEVM
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TPS8125xEVM Schematic
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2
TPS8125xEVM Schematic
For reference only; see Table 2 for specific values.
Figure 1. TPS8125xEVM Schematic
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Connector and Test Point Descriptions
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3
Connector and Test Point Descriptions
3.1
Connectors
3.1.1
J1: VIN Header
This header is the connection for the input power supply and ground. Connect the input power supply to
Pin 1 or 2 and the GND return to Pin 5 or 6. Twist the leads to the power supply and keep them as short
as possible. The input voltage must be between 2.50 V and 4.85 V.
The input Sense connections (Pins 3 and 4) allow access to the input voltage directly at the TPS8125x
input capacitors; therefore, a four-wire power and sense supply can be connected. These connections
allow for accurate voltage measurement by avoiding the I x R voltage drop across the PCB traces. Twist
the leads to the sensing connectors if they are used.
3.1.2
J2: VOUT Header
This header is the connection for the output voltage and return. Connect the load between Pin 1 or 2 and
Pin 5 or 6 (GND). The output Sense connections (Pins 3 and 4) allow access to the voltage directly at the
TPS8125x output capacitors. These connections allow for accurate voltage measurement by avoiding the I
x R voltage drop across the PCB traces.
3.2
3.2.1
Other Connectors
J3: SMA Input Connector
This SMA connector is connected to the input voltage node of the converter and can be terminated with a
49.9 ohm resistor. It can be used to easily analyze the noise spectrum of the output voltage with a
spectrum analyzer. By default, J3 is not assembled on the EVM.
3.2.2
J4: SMA Output Connector
This SMA connector is connected to the output voltage node of the converter and can be terminated with
a 49.9 ohm resistor. It can be used to easily analyze the noise spectrum of the output voltage with a
spectrum analyzer. By default, J4 is not assembled on the EVM.
3.3
3.3.1
Jumpers
JP1: Enable Jumper
Placing a jumper across pins EN and ON ties the EN pin to VIN, which enables the device. Placing a
jumper across pins EN and OFF ties the EN pin to GND, which disables the device.
4
TPS8125xEVM
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TPS8125xEVM Printed Circuit Board Layout
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TPS8125xEVM Printed Circuit Board Layout
Figure 2 through Figure 6 show the design of the TPS8125xEVM-121 printed circuit board (PCB). The
EVM has been designed using a four-layer PCB with all components on the top side of the board. Moving
components to both sides of the PCB can offer additional size reduction for space-constrained systems.
All the following images are viewed from the top of the PCB.
Figure 2. TPS8125xEVM Component Placement
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TPS8125xEVM Printed Circuit Board Layout
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Figure 3. TPS8125xEVM Top Copper
6
TPS8125xEVM
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TPS8125xEVM Printed Circuit Board Layout
Figure 4. TPS8125xEVM Inner Layer 1
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TPS8125xEVM Printed Circuit Board Layout
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Figure 5. TPS8125xEVM Inner Layer 2
8
TPS8125xEVM
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Bill of Materials
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Figure 6. TPS8125xEVM Bottom Copper
5
Bill of Materials
Table 2 lists the EVM components as configured according to the schematic shown in Figure 1.
Table 2. TPS8125xEVM Bill of Materials
Count
Ref Des
Value
1
C1
150 µF
Size
Part Number
MFR
Capacitor, Tantalum, 6.3 V, 70 mΩ, 20%
0
C2
1
3528 (B)
T520B157M006ATE070
Kemet
Open
Capacitor, Ceramic
0402
Std
Std
C3
4.7 µF
Capacitor, Ceramic, 16 V, X5R, 10%
0603
GRM188R61C475KAAJ
Murata
0
C4
Open
Capacitor, Ceramic
0603
Std
Std
2
J1, J2
PEC06SAAN
Header, Male 6-pin, 100mil spacing
0.100 inch x 6
PEC06SAAN
Sullins
0
J3, J4
Open
Connector, SMT Straight, Jack Receptacle
0.250 SQ
142-0711-201
Johnson
1
JP1
PEC03SAAN
Header, Male 3-pin, 100mil spacing
0.100 inch x 3
PEC03SAAN
Sullins
0
R1, R2
Open
Resistor, Chip, 1/16W, 1%
0402
Std
Std
1
R3
1.00MΩ
Resistor, Chip, 1/16W, 1%
0603
Std
Std
IC, High-Efficiency Micro-SiP Boost
Converter, 5.0 V
uBGA
TPS81256SIP
TI
1
U1
TPS81256SIP
Description
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9
EVALUATION BOARD/KIT/MODULE (EVM) ADDITIONAL TERMS
Texas Instruments (TI) provides the enclosed Evaluation Board/Kit/Module (EVM) under the following conditions:
The user assumes all responsibility and liability for proper and safe handling of the goods. Further, the user indemnifies TI from all claims
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Should this evaluation board/kit not meet the specifications indicated in the User’s Guide, the board/kit may be returned within 30 days from
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REGULATORY COMPLIANCE INFORMATION
As noted in the EVM User’s Guide and/or EVM itself, this EVM and/or accompanying hardware may or may not be subject to the Federal
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For EVMs not subject to the above rules, this evaluation board/kit/module is intended for use for ENGINEERING DEVELOPMENT,
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General Statement for EVMs including a radio
User Power/Frequency Use Obligations: This radio is intended for development/professional use only in legally allocated frequency and
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Changes or modifications not expressly approved by the party responsible for compliance could void the user's authority to operate the
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FCC Interference Statement for Class A EVM devices
This equipment has been tested and found to comply with the limits for a Class A digital device, pursuant to part 15 of the FCC Rules.
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instruction manual, may cause harmful interference to radio communications. Operation of this equipment in a residential area is likely to
cause harmful interference in which case the user will be required to correct the interference at his own expense.
FCC Interference Statement for Class B EVM devices
This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to part 15 of the FCC Rules.
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this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and
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• Reorient or relocate the receiving antenna.
• Increase the separation between the equipment and receiver.
• Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.
• Consult the dealer or an experienced radio/TV technician for help.
For EVMs annotated as IC – INDUSTRY CANADA Compliant
This Class A or B digital apparatus complies with Canadian ICES-003.
Changes or modifications not expressly approved by the party responsible for compliance could void the user’s authority to operate the
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Concerning EVMs including radio transmitters
This device complies with Industry Canada licence-exempt RSS standard(s). Operation is subject to the following two conditions: (1) this
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This radio transmitter has been approved by Industry Canada to operate with the antenna types listed in the user guide with the maximum
permissible gain and required antenna impedance for each antenna type indicated. Antenna types not included in this list, having a gain
greater than the maximum gain indicated for that type, are strictly prohibited for use with this device.
Cet appareil numérique de la classe A ou B est conforme à la norme NMB-003 du Canada.
Les changements ou les modifications pas expressément approuvés par la partie responsable de la conformité ont pu vider l’autorité de
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Le présent appareil est conforme aux CNR d'Industrie Canada applicables aux appareils radio exempts de licence. L'exploitation est
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】
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For Feasibility Evaluation Only, in Laboratory/Development Environments. Unless otherwise indicated, this EVM is not a finished
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