Datasheet

Test Procedure

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6 Test Procedure

All tests should use the set up as described in Section 5 of this user’s guide. The following test procedure

is recommended primarily for power up and shutting down the evaluation module. Never leave a powered

EVM unattended for any length of time.

6.1 Applying Power to the EVM

1. Set up the EVM as shown in Section 5 of this user’s guide

(a) If no-load input power measurements are to be made, set the power analyzer to long averaging

and external shunt mode. Insert a shunt, such as a 10-Ω resistor as shown in Figure 3, in series

with the Neutral terminal of the EVM. Set the appropriate current scale on the power analyzer.

(b) For operation with a load, as shown in Figure 4, set the electronic load to constant current mode to

sink 0 A.

2. Prior to turning on the AC source, set the voltage to between 85 V

and 265 V

3. Turn on the AC source.

4. Monitor the output voltage on DMM V

5. Monitor the output current on DMM A

6. The EVM is now ready for testing.

6.2 No-Load Power Consumption

1. Use the test set up shown in Figure 3.

(a) Set the power analyzer to external shunt mode.

(b) Set the appropriate current scale factor for using an external shunt on the power analyzer. A 10-Ω

shunt scales at 10,000 mV/A for the PM100 Voltech.

Voltech should be set to a long averaging time of 10 or more for accurate burst mode

measurements.

2. Apply power to the EVM per Section 6.1.

3. Monitor the input power on the power analyzer while varying the input voltage.

4. Make sure the input power is off and the bulk capacitor and output capacitors are completely

discharged before handling the EVM.

UCC28610EVM-474 25-W Universal Off-Line Flyback Converter SLUU383C–November 2009–Revised June 2011

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