Test Procedure for the 45-W High Density NCP1339H Evaluation Board 1 Yann Vaquette - 6/15/2015 Public Information Board Electrical Schematic Dc output voltage Vout C5 2 2 0p R1 100k C3 82u 400V LGJ 2G820MELA20 R8 2 .7 k C 22 33n T1 R 11 1 50 k IN D1 C GR M4 0 0 7 L1 10 mH / 2 A C2 3 3 0 nF D6 R SFJ L R 12 22k R6 4.7M C6 1n B32922D3334K C9 4 7p C7 1n F1 2A / 2 50 V R 10 1k IC 3x Op to Ba s e D4 MMSD 4 1 4 8 1 14 2 13 3 12 4 11 5 10 6 9 7 D3 MMSD 4 1 4 8 C8 2 .2 n R7 10M 35V D9 BAS2 1 35V Gnd M2 FD MS8 6 2 55 ET1 50 R 20 470 C4 NC R 15 10 D8 MMSD 4 1 4 8 C 13 10 0 p Q1 BC 8 5 7 R 26 1k R 28 3 6k IC 5 N C P4 3 0 5A M1 SPP0 7 N 6 5C 3 8 Gnd R 25 10k C 18 100n R 16 47k R 21 5 .1 k 1 8 2 7 3 6 4 5 IC 3 OptoD iod e R 27 1 0k R 29 1 10 k C 20 47n IC 4 N C P4 3 1 C 14 100n R 17 0 .3 3 R R 19 2 2k C1 2 .2 n F NCP1339 demoboard 19 V / 45 W Gnd Ac input voltage Yann Vaquette - 6/15/2015 C 17 6 8 0 uF . D7 BAS21 C 15 1 0 0u / 3 5V R 13 N TC C 12 1n J2 PL U G1 C 16 6 80 u F R 24 6 .8 k C 19 1uF R 14 1k C 11 1n J1 PL U G1 . IC 2 N C P1 33 9 H R5 4.7M D2 C GR M4 0 0 7 . D5 2 0V R4 5.6M 2 R 23 39k R 22 39 k - + IC 1 Z4 GP2 0 6 L C 21 10n R3 47 R9 2 .7 k Public Information ON Semiconductor - Confidential propertyGnd Gnd Board Picture Live parts, lethal voltages Isolated output Output voltage is 19 V, nominal current is 2.4 A Input voltage from 85 V rms to 265 V rms 3 Yann Vaquette - 6/15/2015 Public Information Needed Equipment The needed equipements are the following: An ac source (85 to 265 V rms, 60 / 50 Hz), needed power is below 100 W An input ac watt-meter, up to 100 W A dc load absorbing up to 50 V, Vin(max) < 30 V, Iout(max) < 6 A Usually, dc electronic load can display dc V and dc A. If not, an voltmeter and ampmeter will be needed If the load does not use local Kelvin sensors, then the output voltage must be measured at the board level, not at the cable ends. 4 Yann Vaquette - 6/15/2015 Public Information Connecting the Board for Testing Watt-meter Input power 19 V Electronic load Ac source 85 to 265 V rms 5 Yann Vaquette - 6/15/2015 Public Information Test n°1: No-load Standby Apply the input voltage 115 V rms to J1 connector Electronic load is disconnected or set to no load Check that output voltage is 19 V (±5%) Verify that input power is below 35 mW Apply the input voltage to 230 V rms Repeat above steps Input power must be below 40 mW 6 Yann Vaquette - 6/15/2015 Public Information Test n°2: Nominal Power Apply the input voltage 115 V rms to J1 connector Connect electronic load to J2 connector Load is set to 2.4 A Check that output voltage is 19 V (±5%) Verify that input power is: Pin < 50 W Apply the input voltage to 230 V rms Repeat above steps 7 Yann Vaquette - 6/15/2015 Public Information Test n°3: Maximum Power Apply the input voltage 115 V rms to J1 connector Connect electronic load to J2 connector Load is increased over nominal current (2.4 A) At a certain point, Iout(max), Vout collapses and the converter enters in auto-recovery mode (typical is 3.5 A) Maximum output current is: 2.7 A < Iout(max) < 5.1 A Apply the input voltage to 265 V rms Repeat above steps Iout(max) is now typically 5.1 A 8 Yann Vaquette - 6/15/2015 Public Information Test n°4: Short-circuit Apply the input voltage 115 V rms to J1 connector Short-circuit is applied at the output via the electronic load for instance Load is increased over nominal current (2.4 A) Vout must collapse and the converter enters in autorecovery mode Verify that average input power is below 3 W Apply the input voltage to 265 V rms Repeat above steps 9 Yann Vaquette - 6/15/2015 Public Information