Texas Instruments TPS22925EVM Bedienungsanleitung
User's Guide
SLVUAM2A–November 2015–Revised January 2016
TPS22925EVM 3.6-V, 3-A, 9-mΩOn-Resistance Load
Switch Evaluation Module
The TPS22925 evaluation module (EVM) allows the user to connect power to and control the 6-pin YPH
package load switch. Parameters such as the on-resistance, rise time, and output pull-down resistance
can be easily evaluated. Table 1 lists a short description of the TPS22925 load switch performance
specifications; for additional details on load switch performance, application notes, and the datasheet see
www.ti.com/loadswitch.
Table 1. TPS22925 Rise Time, Output Current Rating, Enable, and Output Discharge
Characteristics
Rise Time Maximum Enable Quick Output
EVM Device VIN (V)
Typical Continuous Current (ON Pin) Discharge
HVL135-001 TPS22925B 100 μs 3.6 3 A Active High Yes
HVL135-002 TPS22925BN 100 μs 3.6 3 A Active High No
HVL135-001 TPS22925C 810 μs 3.6 3 A Active High Yes
HVL135-002 TPS22925CN 810 μs 3.6 3 A Active HIgh No
Contents
1 Introduction ................................................................................................................... 2
1.1 Description........................................................................................................... 2
1.2 Features.............................................................................................................. 2
2 Electrical Performance...................................................................................................... 2
3 Schematic..................................................................................................................... 2
4 Layout ......................................................................................................................... 3
4.1 Setup ................................................................................................................. 5
5 Operation ..................................................................................................................... 6
6 Test Configurations.......................................................................................................... 7
6.1 On-Resistance (RON) Test Setup.................................................................................. 7
6.2 Slew Rate Test Setup.............................................................................................. 8
7 Bill of Materials (BOM) ...................................................................................................... 9
List of Figures
1 TPS22925EVM Schematic ................................................................................................ 2
2 TPS22925EVM Top Assembly............................................................................................. 3
3 TPS22925EVM Top Layout ............................................................................................... 4
4 TPS22925EVM Bottom Layout ............................................................................................ 5
5 RON Setup ..................................................................................................................... 7
6 Slew Rate Setup............................................................................................................. 8
List of Tables
1 TPS22925 Rise Time, Output Current Rating, Enable, and Output Discharge Characteristics................... 1
2 Bill of Materials TPS22925EVM ........................................................................................... 9
1
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Introduction
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1 Introduction
1.1 Description
The TPS22925EVM is a two-sided PCB containing the TPS22925 load switch devices. The VIN and
VOUT connections to the device and the PCB layout routing are capable of handling high continuous
currents and provide a low resistance pathway into and out of the device under test. Test point
connections allow the EVM User to control the device with user defined test conditions and make accurate
RON measurements.
1.2 Features
• VIN input voltage range: 0.65 V to 3.6 V.
• EVM allows access to the VIN, VOUT, GND, and ON pin of the TPS22925 Load Switch Devices.
• On board CIN and COUT capacitors.
• 3 A max continuous current operation.
•24-mm2Load Switch solution size sampled on this EVM.
2 Electrical Performance
Refer to the datasheet (SLVS840) for detailed electrical characteristics of the TPS22925.
3 Schematic
Figure 1. TPS22925EVM Schematic
2TPS22925EVM 3.6-V, 3-A, 9-mΩOn-Resistance Load Switch Evaluation SLVUAM2A–November 2015–Revised January 2016
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Layout
Figure 4. TPS22925EVM Bottom Layout
4.1 Setup
This section describes the jumpers and connectors on the EVM as well as how to properly connect, set
up, and use the EVM.
4.1.1 J1/J5 – Input Connection
This is the connection for the leads from the input source. Connect the positive lead to J1/J5 and the
negative lead to J3/J7 (GND).
4.1.2 J2/J6 – Output Connection
This is the connection for the output of the EVM. Connect the positive lead to J2/J6 terminals and the
negative lead to J4/J8 terminals (GND).
4.1.3 JP1/JP4 – ON
This is the enable input for the device. A shorting jumper must be installed on JP1/JP4 in either the high
or low position. The TPS22925 is active high. ON must not be left floating. An external enable source can
be applied to the EVM by removing the shunt and connecting a signal to TP2/TP5. Refer to the datasheet
for proper ON and OFF voltage level settings. A switching signal may also be used and connected at this
point.
5
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Operation
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4.1.4 TP1/TP4 - VIN Sense, TP3/TP6 - VOUT Sense
These two connections are used when very accurate measurements of the input or output are required.
RON measurements should be made using these sense connections when measuring the voltage drop
from VIN to VOUT to calculate the resistance.
4.1.5 JP2/JP5- Input Capacitor
During normal operation a shorting jumper is placed on JP2/JP5 this connects C1/C3 capacitor from the
input of the device to ground. Refer to the Applications Section of the Datasheet for additional information
on selecting the input capacitor.
4.1.6 JP3/JP6 - Output Capacitor
During normal operation a shorting jumper is placed on JP3/JP6 this connects C2/C4 capacitor from the
output of the device to ground. Refer to the Applications Section of the Datasheet for additional
information on selecting the output capacitor.
4.1.7 J3/J4/J7/J8 – GND
These are connections to GND.
5 Operation
Connect the positive input of the VIN power supply to VIN at J1/J5. Connect the negative lead of the
power supply to GND at J3/J7. The input voltage range of the TPS22925EVM is 0.65 V to 3.6 V.
External output loads can be applied to the switch by using J2/J6 VOUT and J4/J8 GND. The
TPS22925EVM is rated for a maximum continuous current of 3 A. Configure JP1/JP4 as required.
JP1/JP4 must be installed for proper operation. When the ON pin is asserted high, the output of the
TPS22925 will be enabled.
6TPS22925EVM 3.6-V, 3-A, 9-mΩOn-Resistance Load Switch Evaluation SLVUAM2A–November 2015–Revised January 2016
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Test Configurations
6 Test Configurations
6.1 On-Resistance (RON) Test Setup
Figure 5 shows a typical setup for measuring on-resistance. The voltage drop across the switch is
measured using the sense connections. This value is then divided by the current into the load, yielding the
RON resistance.
Figure 5. RON Setup
7
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Test Configurations
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6.2 Slew Rate Test Setup
Figure 6 shows a test setup for measuring the slew rate of the load switch. Apply a square wave to the
ON pin of the switch using a function generator and apply a voltage to the VIN terminal using a power
supply. Observe waveform at VOUT with a scope to measure the slew rate and rise time of the switch with
a given input voltage.
Figure 6. Slew Rate Setup
8TPS22925EVM 3.6-V, 3-A, 9-mΩOn-Resistance Load Switch Evaluation SLVUAM2A–November 2015–Revised January 2016
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Bill of Materials (BOM)
7 Bill of Materials (BOM)
Table 2. Bill of Materials TPS22925EVM
Qty Designator Value Description Package Reference Manufacturer Part Number
1 !PCB1 Printed Circuit Board Any HVL078
2 C1, C3 1uF CAP, CERM, 1uF, 25V, +/-10%, X7R, 0603 0603 MuRata GRM188R71E105KA12D
2 C2, C4 0.1uF CAP, CERM, 0.1uF, 100V, +/-10%, X7R, 0603 0603 MuRata GRM188R72A104KA35D
12 J1, J2, J3, J4, J5, J6, PEC02S Header, 100mil, 2x1, Gold, TH 0.100 inch x 2 Samtec TSW-102-07-G-S
J7, J8, JP2,JP3, JP5, AAN
JP6
2 JP1, JP4 Header, 100mil, 3x1, Gold, TH Header, 3 PIN, 100mil Samtec TSW-103-07-G-S
3 LBL1, LBL2, LBL3 Thermal Transfer Printable Labels, 0.650" W x 0.200" H - 10,000 per PCB Label 0.650"H x Brady THT-14-423-10
roll 0.200"W
6 SH-J1, SH-J2, SH-J3, 1x2 Shunt, 100mil, Gold plated, Black Shunt 3M, alternate: Samtec 969102-0000-DA, alternate: SNT-
SH-J4, SH-J5, SH-J6 100-BK-G
6 TP1, TP2, TP3, TP4, Test Point, Miniature, SMT Test Point, Miniature, Keystone 5019
TP5, TP6 SMT
1 U1 Single Channel Ultra-Low Resistnace Load Switch YPH0006ACAC Texas Instruments TPS22925BYPHR
1 U1 Single Channel Ultra-Low Resistnace Load Switch YPH0006ACAC Texas Instruments TPS22925BNYPHR
1 U1 Single Channel Ultra-Low Resistnace Load Switch YPH0006ACAC Texas Instruments TPS22925CYPHR
1 U1 Single Channel Ultra-Low Resistnace Load Switch YPH0006ACAC Texas Instruments TPS22925CNYPHR
0 FID1, FID2, FID3 Fiducial mark. There is nothing to buy or mount. Fiducial N/A N/A
9
SLVUAM2A–November 2015–Revised January 2016 TPS22925EVM 3.6-V, 3-A, 9-mΩOn-Resistance Load Switch Evaluation
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Revision History
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Revision History
Changes from Original (November 2015) to A Revision ................................................................................................ Page
• Changed 10 mΩto 9 mΩin title of the document..................................................................................... 1
NOTE: Page numbers for previous revisions may differ from page numbers in the current version.
10 Revision History SLVUAM2A–November 2015–Revised January 2016
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