Texas Instruments 4A, 5V to 22V Input, 1.2Vout Converter Evaluation Module featuring TPS53114 TPS53114EVM-541 TPS53114EVM-541 Datenbogen
Produktcode
TPS53114EVM-541
Connector and Test Point Descriptions
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Connector and Test Point Descriptions
4.1
Enable Switch and Enable Sense – SW1 and JP2
The TPS53115EVM-451 is equipped with a switch (SW1) to drive the EN pin of the TPS53114. When
SW1 is in the EN position, EN is connected to VIN, and the TPS53114 is enabled and generates a
regulated 1.20-V output. When SW1 is in the DIS position, EN is connected to GND, and the TPS53114
enters a high-impedance output state with approximately 15 k
SW1 is in the EN position, EN is connected to VIN, and the TPS53114 is enabled and generates a
regulated 1.20-V output. When SW1 is in the DIS position, EN is connected to GND, and the TPS53114
enters a high-impedance output state with approximately 15 k
Ω
to GND.
Installing JP2 connects the EN pin voltage to the Enable Sense test point (TP9) to allow the user to
monitor the EN pin status.
monitor the EN pin status.
4.2
Frequency Selection Switch and Frequency Sense – SW2 and JP1
The TPS53115EVM-451 is equipped with a switch (SW2) to drive the FSEL pin of the TPS53114. When
SW2 is in the 350-kHz position, EN is connected to VIN, and the TPS53114 is programmed to switch as
350 kHz. When SW2 is in the 700-kHz position, FSEL is connected to GND, and the TPS53114 is
programmed to switch at 700 kHz.
SW2 is in the 350-kHz position, EN is connected to VIN, and the TPS53114 is programmed to switch as
350 kHz. When SW2 is in the 700-kHz position, FSEL is connected to GND, and the TPS53114 is
programmed to switch at 700 kHz.
Installing JP1 connects the FSEL pin voltage to the Frequency Sense test point (TP6) to allow the user to
monitor the FSEL pin status.
monitor the FSEL pin status.
4.3
Test Point Descriptions
Table 2. Test Point Description
Test Point
Label
Use
Section
TP1
VIN
Monitor input voltage
4.3.1
TP2
PGND
Ground for input voltage
4.3.1
TP3
VOUT
Monitor output voltage
4.3.2
TP4
PGND
Ground for output voltage
4.3.2
TP5
LL
Monitor switch node voltage
4.3.3
TP6
FSEL
Monitor frequency select voltage
4.3.4
TP7
CER
Monitor output capacitor select pin voltage
4.3.5
TP8
SS
Monitor soft-start ramp voltage
4.3.6
TP9
EN
Monitor enable voltage
4.3.7
4.3.1
Input Voltage Monitoring –TP1 and TP2
The TPS53114EVM-541 provides two test points for measuring the voltage applied to the module. This
allows the user to measure the actual module voltage without losses from input cables and connectors. All
input voltage measurements must be made between TP1 and TP2. To use TP1 and TP2, connect a
voltmeter positive terminal to TP1 and negative terminal to TP2.
allows the user to measure the actual module voltage without losses from input cables and connectors. All
input voltage measurements must be made between TP1 and TP2. To use TP1 and TP2, connect a
voltmeter positive terminal to TP1 and negative terminal to TP2.
4.3.2
Output Voltage Monitoring – TP3 and TP4
The TPS53114EVM-541 provides two test points for measuring the output voltage generated by the
module. This allows the user to measure the actual module voltage without losses from output cables and
connectors. All output voltage measurements must be made between TP3 and TP4. To use TP3 and TP4,
connect a voltmeter positive terminal to TP3 and negative terminal to TP4.
module. This allows the user to measure the actual module voltage without losses from output cables and
connectors. All output voltage measurements must be made between TP3 and TP4. To use TP3 and TP4,
connect a voltmeter positive terminal to TP3 and negative terminal to TP4.
4.3.3
Switching (Phase) Voltage Monitoring – TP5 and TP4
The TPS53114EVM-541 provides a test point for measuring the switching or phase node voltage at the
junction of the two MOSFETs. This allows the user to monitor the switching waveform without additional
wires or cables. Basic switch node measurements made from TP5. To use TP5, connect an oscilloscope
probe tip to TP5, and use TP4 for the ground clip.
junction of the two MOSFETs. This allows the user to monitor the switching waveform without additional
wires or cables. Basic switch node measurements made from TP5. To use TP5, connect an oscilloscope
probe tip to TP5, and use TP4 for the ground clip.
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TPS53114EVM-541
SLVU373A – March 2010 – Revised May 2012
Copyright © 2010–2012, Texas Instruments Incorporated