User's Guide
SLVU232A – December 2007 – Revised March 2008
Three-Channel, Power-Distribution Switch EVM
This user’s guide describes the TPS20xxEVM-294 family of evaluation modules (EVM). This guide
contains the EVM schematics, bill of materials, assembly drawings, and top and bottom board layouts.
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Contents
Introduction ...................................................................................................................
Schematics and Bill of Materials ...........................................................................................
2.1
EVM Options ........................................................................................................
2.2
Schematics ..........................................................................................................
2.3
Bill of Material .......................................................................................................
Board Layout .................................................................................................................
3.1
TPS20xxEVM-294 Board ..........................................................................................
3.2
TPS20xxEVM-294 Top-Side Layout .............................................................................
3.3
TPS20xxEVM-294 Bottom-Side Layout..........................................................................
EVM Setup....................................................................................................................
4.1
Recommended Test Equipment .................................................................................
4.2
Measuring Current Limit ...........................................................................................
Related Documentation from Texas Instruments ........................................................................
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6
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8
List of Figures
1
2
3
TPS20xxEVM-294 Schematic .............................................................................................. 3
EVM Setup For Measuring Current Limit ................................................................................. 7
TPS2053BEVM-294 Short-Circuit Output Current and OCx Status .................................................. 7
List of Tables
1
2
TPS20xxEVM-294 Options ................................................................................................. 2
TPS20xxEVM-294 Bill of Materials ........................................................................................ 4
SLVU232A – December 2007 – Revised March 2008
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Introduction
1
Introduction
The TPS20xxEVM-294 family of evaluation modules (EVM) support the three-channel, current-limited,
power-distribution switches in Table 1. These EVMs operate over a 2.7-V to 5.5-V range and provide a
continuous output current of up to 1 A. Test points provide convenient access to all critical node voltages.
The silkscreen outline on the PCB top-side encloses components found in a typical USB application.
The TPS20xxEVM-294 accepts an SO-16 packaged power-distribution switch. These switches have an
enable input, an overcurrent status output, overtemperature shutdown, and identical pinouts.
Table 1 summarizes the available EVM options.
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Schematics and Bill of Materials
2.1
EVM Options
Table 1. TPS20xxEVM-294 Options
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Continuous
Output Current
(A)
ENABLE
TPS2043BD
0.5
Active Low
TPS2047BD
0.25
Active Low
TPS2053BEVM-294
TPS2053BD
0.5
Active High
TPS2057AEVM-294
TPS2057AD
0.25
Active High
TPS2063EVM-294
TPS2063D
1
Active Low
TPS2067EVM-294
TPS2067D
1
Active Low
EVM
Device
TPS2043BEVM-294
TPS2047BEVM-294
Three-Channel, Power-Distribution Switch EVM
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Schematics and Bill of Materials
2.2
Schematics
+
+
+
See Table 2.
Figure 1. TPS20xxEVM-294 Schematic
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Schematics and Bill of Materials
2.3
Bill of Material
Table 2. TPS20xxEVM-294 Bill of Materials
QTY
4
RefDes
Value
Description
Size
Part Number
MFR
-001
-002
-003
-004
-005
-006
2
2
2
2
2
2
C1, C2
10µF
Capacitor, Ceramic, 10-µF, X7R, 10V, 10%
1206
STD
STD
5
5
5
5
5
5
C3–C7
0.1µF
Capacitor, Ceramic, 16V, X7R, 10%
0805
STD
STD
3
3
3
3
3
3
C8–C10
150µF
Capacitor, Tantalum, 150µF, 10V, 100mΩ, 10%
7343 (D)
B45197A2157K409
Kemet
1
0
0
0
0
0
U1
TPS2043BD
IC, Triple Power-Distribution Switch, 5.5V, 500mA
SO16
TPS2043BD
TI
0
1
0
0
0
0
U1
TPS2047BD
IC, Triple Power-Distribution Switch, 5.5V, 250mA
SO16
TPS2047BD
TI
0
0
1
0
0
0
U1
TPS2053BD
IC, Triple Power-Distribution Switch, 5.5V, 500mA
SO16
TPS2053BD
TI
0
0
0
1
0
0
U1
TPS2057AD
IC, Triple Power-Distribution Switch, 5.5V, 250mA
SO16
TPS2057AD
TI
0
0
0
0
1
0
U1
TPS2063D
IC, Triple Power-Distribution Switch, 5.5V,
1000mA
SO16
TPS2063D
TI
0
0
0
0
0
1
U1
TPS2067D
IC, Triple Power-Distribution Switch, 5.5V,
1000mA
SO16
TPS2067D
TI
1
1
1
1
1
1
--
HPA294
PCB, 2.72 In x 2.445 In x 0.062 In
HPA294
Any
6
6
6
6
6
6
R1–R6
10.0K
Resistor, Chip, 1/10W, 1%
CRCW0805-1002F
Vishay
Three-Channel, Power-Distribution Switch EVM
0805
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Board Layout
3
Board Layout
3.1
TPS20xxEVM-294 Board
3.2
TPS20xxEVM-294 Top-Side Layout
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EVM Setup
3.3
TPS20xxEVM-294 Bottom-Side Layout
4
EVM Setup
4.1
Recommended Test Equipment
The following test equipment is recommended:
• Two-channel storage oscilloscope
• Current probe
• Voltage probe
• An adjustable power supply with a 2.7-V to 5.5-V output and a 5-A output current-limit.
• Volt-ohm meter
• A passive or active load capable of handling 5 A
4.2
Measuring Current Limit
The user should read the applicable data sheet before using the EVM.
Figure 2 shows the EVM test setup for measuring current limit. A single switch is enabled into a short
circuit for this measurement. Figure 3 shows the current waveform for a TPS2053BEVM-294.
6
Three-Channel, Power-Distribution Switch EVM
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EVM Setup
Oscilloscope
Current
Probe
Voltage Probe
OCx
+
IN1
-
5 V,5 A
7" Twisted Pair, #20 AWG
+
OUT1
-
0W
J7
+
OUT2
-
0W
J8
+
OUT3
-
0W
J1
EVM
+
IN2
-
J6
J2
Figure 2. EVM Setup For Measuring Current Limit
ILIMIT
Figure 3. TPS2053BEVM-294 Short-Circuit Output Current and OCx Status
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Related Documentation from Texas Instruments
5
Related Documentation from Texas Instruments
1. TPS2041B/42B/43B/44B/51B/52B/53B/54B, Current-Limited, Power-Distribution Switches data sheet
(SLVS514)
2. TPS2045B/46B/47B/55B, Current-Limited, Power-Distribution Switches data sheet (SLVS532)
3. TPS2045A/46A/47A/56A/57A/58A, Current-Limited, Power-Distribution Switches data sheet (SLVS251)
4. TPS2061/62/63/65/66/67, Current-Limited, Power-Distribution Switches data sheet (SLVS490)
8
Three-Channel, Power-Distribution Switch EVM
SLVU232A – December 2007 – Revised March 2008
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EVALUATION BOARD/KIT IMPORTANT NOTICE
Texas Instruments (TI) provides the enclosed product(s) under the following conditions:
This evaluation board/kit is intended for use for ENGINEERING DEVELOPMENT, DEMONSTRATION, OR EVALUATION PURPOSES
ONLY and is not considered by TI to be a finished end-product fit for general consumer use. Persons handling the product(s) must have
electronics training and observe good engineering practice standards. As such, the goods being provided are not intended to be complete
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measures typically found in end products that incorporate such semiconductor components or circuit boards. This evaluation board/kit does
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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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This evaluation board/kit is intended for use for ENGINEERING DEVELOPMENT, DEMONSTRATION, OR EVALUATION PURPOSES
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EVM WARNINGS AND RESTRICTIONS
It is important to operate this EVM within the input voltage range of 2.7 V to 5.5 V and the output voltage range of 2.7 V to 5.5 V.
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 85°C. The EVM is designed to operate
properly with certain components above 85°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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