Texas Instruments TPS53125EVM-599 Output Ripple Voltage Measurement Procedure, Equipment Shutdown

TPS53125EVM-599 Test Data www.ti.com

7.Decrease LOAD2 to 0 A.

5.4Output Ripple Voltage Measurement Procedure

Perform the Output Ripple Voltage Measurement procedure in the following manner.

1.Increase VIN from 0 V to 12 Vdc.

2.Adjust LOAD1 to desired load between 0 Adc and 4 Adc.

3.Adjust LOAD2 to desired load between 0 Adc and 4 Adc.

4.Adjust VIN to desired load between 8 Vdc and 22 Vdc.

5.Connect oscilloscope probe to CN1 or CN2 shown in Figure 2.

6.Measure Output Ripple.

7.Decrease VIN to 0 Vdc.

8.Decrease LOAD1 to 0 A.

9.Decrease LOAD2 to 0 A.

5.5Equipment Shutdown

Shut down the equipment in the following manner.

1.Shut down oscilloscope.

2.Shut down VIN.

3.Shut down LOAD1.

4.Shut down LOAD2.

5.Shut down FAN.

6TPS53125EVM-599 Test Data

Figure 3 through Figure 10 present typical performance curves for the TPS53125EVM-599. Because actual performance data can be affected by measurement techniques and environmental variables, these curves are presented for reference and may differ from actual field measurements.

6.1	Efficiency
		95
		90
		85	VI	=￿8￿V
	-%￿	80
	EFFICIENCY￿￿-	75			VI =￿12￿V
		70
	η				VI =￿22￿V
		65
		60
		55
		50
		0	1	2	3	4	5
				ILOAD -￿LOAD￿CURRENT￿- A
	VIN = 8 V – 22 V, VOUT1 = 1.05 V, IOUT1 = 0 A – 4 A

Figure 3. TPS53125EVM-599 Efficiency vs Load Current

8 TPS53125EVM-599 SLVU392 –July 2010

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