Texas Instruments TPS53126 Dual Synchronous Step-Down Controller Evaluation Module TPS53126EVM-600 TPS53126EVM-600 데이터 시트
제품 코드
TPS53126EVM-600
TP4
TP8
Metal Ground Barrel
Probe Tip
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Test Setup
Figure 2. Tip and Barrel Measurement for Output Voltage Ripple
4.3.3
Channel-2 Output Voltage Monitoring – TP6 and TP7
TPS53126EVM-600 provides two test points for measuring the voltage generated at the V
OUT2
output by
the module. This allows the user to measure the actual output voltage without losses from output cables
and connectors. Measure all dc output voltage between TP7 and TP6. To use TP7 and TP6, connect a
voltmeter positive terminal to TP7 and negative terminal to TP6.
and connectors. Measure all dc output voltage between TP7 and TP6. To use TP7 and TP6, connect a
voltmeter positive terminal to TP7 and negative terminal to TP6.
For output ripple measurements, TP7 and TP6 allow a user to limit the ground loop area by using the tip
and barrel measurement technique shown in
and barrel measurement technique shown in
4.3.4
Switching Node Monitoring – TP3, TP5, and TP11
TPS53126EVM-600 provides two test points for measuring the switching node waveform voltages. TP5
monitors the switching node of Channel 1. TP2 monitors the switching node of Channel 2. To use TP5 or
TP11, connect an oscilloscope probe between TP5 or TP11 and TP3.
monitors the switching node of Channel 1. TP2 monitors the switching node of Channel 2. To use TP5 or
TP11, connect an oscilloscope probe between TP5 or TP11 and TP3.
4.3.5
5-V Regulator Output Monitoring – TP3 and TP10
TPS53126EVM-600 provides a test point for measuring the output of the internal 5-V regulator. TP10
monitors the output voltage of the internal 5-V regulator. To use TP10, connect a voltmeter positive
terminal to TP10 and negative terminal to TP3.
monitors the output voltage of the internal 5-V regulator. To use TP10, connect a voltmeter positive
terminal to TP10 and negative terminal to TP3.
5
Test Setup
5.1
Equipment
5.1.1
Voltage Source
The input voltage source (V
IN
) shall be a 0-V to 25-V variable dc source capable of supplying 3 Adc
minimum.
5.1.2
Meters
A1: 0-Adc to 5-Adc, ammeter
V1: V
IN
, 0-V to 25-V voltmeter
V2: V
OUT1
, 0-V to 2-V voltmeter
V3: V
OUT2
, 0-V to 2-V voltmeter
5.1.3
Loads
LOAD1: One output load is an electronic load set for constant-current mode capable of 0 Adc to 4 Adc at
1.05 Vdc.
1.05 Vdc.
LOAD2: The other output load is an electronic load set for constant-current mode capable of 0 Adc to 4
Adc at 1.8 Vdc.
Adc at 1.8 Vdc.
7
SLVU435 – February 2011
TPS53126EVM-600
© 2011, Texas Instruments Incorporated