Test Procedure for the NCP3170 Evaluation Board KIKUSUI ELECTRONIC LOAD 165W 0-150V 0-33A PLZ164WA 2.5 V FLUKE 45 E3646A 100 mA 0-8V,3A/0-20V, 1.5A MODE SET RANGE SLEW OPP RCL ENTER SW ON FREQ LEVEL A B C SHIFT LOAD Dual Output DC Power Supply 12 V LOCAL 1A MAX COM Agilent 1.2 A 10A V 1000V 750V Dual Display Multimeter V 0.2A V A A OHM FREQ REL dB 2ND HOLD MIN RATE AUTO POWER 1 2 Track LOW RCL High Store OV View DL I/O < VoL OUT > FLUKE 45 10A V 1000V 750V COM POWER Dual Display Multimeter 2.5 V MAX 100 mA V A OHM V A FREQ REL dB 2ND HOLD MIN RATE AUTO POWER Figure 1: Test Setup The following steps describe the test procedure for all these boards: Suggested Equipment: Current limited DC Power Supply (e.g. AGILENT 6645A) ……………………… 1pc DC Volt-Meter able to measure up to 60 V DC (e.g. KEITHLEY 2000) ………… 2pcs DC Amp-Meter able to measure up to 2 A DC (e.g. KEITHLEY 2000) ………......1pc DC Amp-Meter able to measure up to 5 A DC (e.g. FLUKE 89 IV)……………… 1pc DC Electronic Load (e.g. AGILENT 6060B) ……………………………………... 1pc 3/18/2011 1 www.onsemi.com Test Procedure: 1. Connect the test setup as shown in Figure 1. 2. Apply an input voltage, VIN = 5.0-18 Vdc 3. Apply IOUT(load) = 0 A 4. Ensure the EN SIP Header is not shorted 5. Check that VOUT = 0V Vdc 6. Short EN SIP Header with provided jumper 7. Observe Soft and PG signal proper behavior as shown in Figure 2 8. Check that VOUT = 3.3 + 5%Vdc 9. Set IOUT to desired level 0 A- 3 A and measure voltage and current the efficiency should be similar to that shown in Figure 3 and 4 10. Check that VOUT = 3.3 + 5%Vdc under desired operating condition 11. Turn off the load 12. Turn off VIN 13. End of the test 14. Figure 2: NCP3170 Startup and Regulation with PG Indication 3/18/2011 2 www.onsemi.com Figure 3: NCP3170 Efficiency at 5V Input and 1.2V, 1.8V, and 3.3V Output Figure 2: NCP3170 Efficiency at 5V Input and 1.2V, 1.8V, and 3.3V Output 3/18/2011 3 www.onsemi.com