Texas Instruments TPS54386 Evaluation Module TPS54386EVM TPS54386EVM Datenbogen
Produktcode
TPS54386EVM
www.ti.com
3.3.1
Input Voltage Monitoring (TP1 and TP2)
3.3.2
Channel 1 Output Voltage Monitoring (TP3 and TP4)
3.3.3
Channel 1 Loop Analysis (TP5, TP6, TP7 and TP8)
3.3.4
Channel 1 Switching Waveforms (TP9 and TP10)
3.3.5
TPS54386 Device Ground (TP11)
3.3.6
Channel 2 Switching Waveforms (TP12 and TP13)
3.3.7
Channel 2 Loop Analysis (TP14, TP15, TP16 and TP17)
3.3.8
Output Voltage Monitoring (TP18 and TP19)
Schematic
TPS54386EVM 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 should be made between TP1 and TP2. To use TP1 and TP2, connect a voltmeter
positive terminal to TP1 and negative terminal to TP2.
user to measure the actual module voltage without losses from input cables and connectors. All input
voltage measurements should be made between TP1 and TP2. To use TP1 and TP2, connect a voltmeter
positive terminal to TP1 and negative terminal to TP2.
TPS54386EVM provides two test points for measuring the voltage generated by the module. This allows
the user to measure the actual module output voltage without losses from output cables and connectors.
All output voltage measurements should be made between TP3 and TP4. To use TP3 and TP4, connect a
voltmeter positive terminal to TP3 and negative terminal to TP4. For Output ripple measurements, TP3
and TP4 allow a user to limit the ground loop area by using the Tip and Barrel measurement technique
shown in
the user to measure the actual module output voltage without losses from output cables and connectors.
All output voltage measurements should be made between TP3 and TP4. To use TP3 and TP4, connect a
voltmeter positive terminal to TP3 and negative terminal to TP4. For Output ripple measurements, TP3
and TP4 allow a user to limit the ground loop area by using the Tip and Barrel measurement technique
shown in
. All output ripple measurements should be made using the Tip and Barrel
measurement.
TPS54386EVM contains a 51-
Ω
series resistor (R1) in the feedback loop to allow for matched impedance
signal injection into the feedback for loop response analysis. An isolation transformer should be used to
apply a small (30 mV or less) signal across R1 through TP6 and TP8. By monitoring the ac injection level
at TP8 and the returned ac level at TP6, the power supply loop response can be determined.
apply a small (30 mV or less) signal across R1 through TP6 and TP8. By monitoring the ac injection level
at TP8 and the returned ac level at TP6, the power supply loop response can be determined.
TPS54386EVM provides a test point and a local ground connection (TP10) for the monitoring of the
Channel 1 power stage switching waveform. Connect an oscilloscope probe to TP9 to monitor the switch
node voltage for Channel 1.
Channel 1 power stage switching waveform. Connect an oscilloscope probe to TP9 to monitor the switch
node voltage for Channel 1.
TPS54386EVM provides a test point for the device ground. To measure the device pin voltages, connect
the ground of the oscilloscope probe to TP11.
the ground of the oscilloscope probe to TP11.
TPS54386EVM provides a test point and a local ground connection (TP13) for the monitoring of the
Channel 1 power stage switching waveform. Connect an oscilloscope probe to TP12 to monitor the switch
node voltage for Channel 1.
Channel 1 power stage switching waveform. Connect an oscilloscope probe to TP12 to monitor the switch
node voltage for Channel 1.
TPS54386EVM contains a 51-
Ω
series resistor (R10) in the feedback loop to allow for matched
impedance signal injection into the feedback for loop response analysis. An isolation transformer should
be used to apply a small (30 mV or less) signal across R10 through TP14 and TP16. By monitoring the ac
injection level at TP14 and the returned ac level at TP16, the power supply loop response can be
determined.
be used to apply a small (30 mV or less) signal across R10 through TP14 and TP16. By monitoring the ac
injection level at TP14 and the returned ac level at TP16, the power supply loop response can be
determined.
TPS54386EVM provides two test points for measuring the voltage generated by the module. This allows
the user to measure the actual module output voltage without losses from output cables and connector
losses. All output voltage measurements should be made between TP18 and TP19. To use TP18 and
TP19, connect a voltmeter positive terminal to TP18 and negative terminal to TP19. For output ripple
measurements, TP18 and TP19 allow a user to limit the ground loop area by using the Tip and Barrel
measurement technique shown in
the user to measure the actual module output voltage without losses from output cables and connector
losses. All output voltage measurements should be made between TP18 and TP19. To use TP18 and
TP19, connect a voltmeter positive terminal to TP18 and negative terminal to TP19. For output ripple
measurements, TP18 and TP19 allow a user to limit the ground loop area by using the Tip and Barrel
measurement technique shown in
. All output ripple measurements should be made using the Tip
and Barrel measurement.
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