Datasheet

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
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