www.ti.com
Connector and Test Point Descriptions
4
Connector and Test Point Descriptions
4.1
Enable Switches (SW1 and SW2)
TPS53127EVM-614 includes independent enable switches for each of the two outputs. When the switch is
in the DIS position, the channel is disabled and discharged per the TPS53127’s internal discharge
characteristics.
To Enable VOUT1, place SW1 in the EN position
To Enable VOUT2, place SW2 in the EN position
4.2
Switching Frequency Select Switch (SW3)
TPS53127EVM-614 does not populate SW3. When using TPS53127EVM-614 to evaluate the TPS53126
controller in the TSSOP package, SW3 can be populated to allow selection of the TPS53126 switching
frequency between 350 kHz and 700 kHz.
4.3
Test Point Descriptions
Table 2
lists the test points, their labels, uses, and where additional information is located.
Table 2. TPS53127EVM-614 Test Points Description
Test Point
Label
Use
Section
TP1
TEST1
Monitor Channel 1 Soft-Start Voltage
Section 4.3.4
TP2
TEST2
Monitor Channel 2 Soft-Start Voltage
Section 4.3.4
TP3
GND
Ground for Input Voltage
Section 4.3.1
TP4
GND
Ground for Channel 1 Output Voltage
Section 4.3.2
TP5
SW1
Monitor Switching Node for Channel 1
Section 4.3.5
TP6
GND
Ground for Channel 2 Output Voltage
Section 4.3.3
TP7
VO2
Monitor Output Voltage for Channel 2
Section 4.3.3
TP8
VO1
Monitor Output Voltage for Channel 1
Section 4.3.2
TP9
VIN
Monitor Input Voltage
Section 4.3.1
TP10
VREG5
Monitor Output of VREG5 Regulator
Section 4.3.6
TP11
SW2
Monitor Switching Node for Channel 2
Section 4.3.5
CN1
VOUT1
Monitor Output Voltage for Channel 1
Section 4.3.2
CN2
VOUT2
Monitor Output Voltage for Channel 2
Section 4.3.3
4.3.1
Input Voltage Monitoring (TP3 and TP9)
TPS53127EVM-614 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 TP9 and TP3. To use TP9 and TP3, connect a voltmeter
positive terminal to TP9 and negative terminal to TP3.
4.3.2
Channel 1 Output Voltage Monitoring (TP4 and TP8)
TPS53127EVM-614 provides two test points for measuring the voltage generated at the VO1 Output by
the module. This allows the user to measure the actual output voltage without losses from output cables
and connectors. All DC Output voltage measurements should be made between TP8 and TP4. To use
TP8 and TP4, connect a voltmeter positive terminal to TP8 and negative terminal to TP4.
5
SLVU434 – February 2011
TPS53127EVM-614
Submit Documentation Feedback
© 2011, Texas Instruments Incorporated