Test Report PMP7899
1 April 17, 2015
Test Data
For PMP7899
4/17/2015
Test Report PMP7899
2 April 17, 2015
Table of Contents 1. Design Specifications ............................................................................................................................ 3
2. Circuit Description ................................................................................................................................. 3
3. PMP7899 Board Photos ........................................................................................................................ 3
4. Efficiency ............................................................................................................................................... 4
4.1 Efficiency Chart ................................................................................................................................... 4
4.2 Efficiency Data............................................................................................................................... 5
5 Thermal Images .......................................................................................................................................... 6
6 Waveform .................................................................................................................................................. 8
6.1 Switching Waveform ........................................................................................................................... 8
6.2 Output Ripple ...................................................................................................................................... 9
6.3 Load Transient ................................................................................................................................... 11
6.4 Start Up ............................................................................................................................................. 12
6.5 Short Circuit ...................................................................................................................................... 14
6.7 Bode Plot ........................................................................................................................................... 15
Test Report PMP7899
3 April 17, 2015
1. Design Specifications Vin Minimum 8VDC
Vin Maximum 18VDC
Vout +48VDC @ 1A
Nominal Switching Frequency ≈ 340KHz
2. Circuit Description PMP7899 is an isolated flyback converter utilizing the LM5022 for industrial applications. This design
has a minimum operating input voltage of 8V and a maximum input voltage of 18V. The test report
here is for 8V, 12V and 18Vin/~48V out @ 1A of load current. Switching frequency is set to
340kHz. A custom flyback transformer from Coilcraft is used in this design.
3. PMP7899 Board Photos Board Dimensions: 101.6mm x 35.56mm
Board Photo (Top)
Test Report PMP7899
4 April 17, 2015
Board Photo (Bottom)
4. Efficiency
4.1 Efficiency Chart
60.00
65.00
70.00
75.00
80.00
85.00
90.00
0.00 0.20 0.40 0.60 0.80 1.00
Effi
cie
ncy
(%
)
Iout(A)
PPMP7899 Efficiency
8Vin
12Vin
18Vin
Test Report PMP7899
5 April 17, 2015
4.2 Efficiency Data
Vin(V) Iin(A) Pin (W) Vout(V) Iout(A) Pout(W) Losses(W) Efficiency(%)
8.00 0.09 0.74 48.18 0.00 0.00 0.74 0.00
8.00 0.31 2.48 48.17 0.03 1.59 0.89 64.09
8.00 0.88 7.07 48.17 0.13 6.02 1.04 85.22
8.00 1.54 12.28 48.17 0.22 10.50 1.78 85.49
8.00 2.19 17.52 48.17 0.32 15.22 2.30 86.85
8.00 2.84 22.72 48.16 0.41 19.84 2.88 87.34
8.00 3.49 27.89 48.16 0.51 24.42 3.47 87.55
8.00 4.19 33.50 48.15 0.61 29.18 4.32 87.11
8.00 4.88 39.03 48.15 0.70 33.89 5.13 86.84
8.00 5.59 44.76 48.14 0.80 38.61 6.15 86.26
8.00 6.33 50.67 48.13 0.90 43.42 7.25 85.68
8.00 7.12 56.95 48.12 1.01 48.41 8.54 85.01
Vin(V) Iin(A) Pin (W) Vout(V) Iout(A) Pout(W) Losses(W) Efficiency(%)
12.00 0.06 0.72 48.12 0.00 0.00 0.72 0.00
12.00 0.19 2.24 48.13 0.03 1.44 0.80 64.34
12.00 0.59 7.02 48.13 0.12 5.78 1.24 82.28
12.00 1.05 12.60 48.13 0.23 10.88 1.72 86.34
12.00 1.50 17.94 48.13 0.32 15.60 2.34 86.94
12.00 1.93 23.19 48.13 0.42 20.31 2.88 87.58
12.00 2.37 28.45 48.13 0.52 24.98 3.47 87.81
12.00 2.82 33.78 48.12 0.62 29.69 4.09 87.89
12.00 3.27 39.18 48.12 0.71 34.36 4.82 87.69
12.00 3.72 44.62 48.12 0.81 39.07 5.55 87.55
12.00 4.18 50.13 48.11 0.91 43.88 6.25 87.52
12.00 4.66 55.95 48.11 1.01 48.68 7.27 87.01
Vin(V) Iin(A) Pin (W) Vout(V) Iout(A) Pout(W) Losses(W) Efficiency(%)
18.01 0.05 0.83 48.11 0.00 0.00 0.83 0.00
18.01 0.08 1.40 48.11 0.01 0.43 0.97 30.83
18.01 0.37 6.72 48.12 0.11 5.34 1.38 79.51
18.01 0.60 10.71 48.12 0.19 8.90 1.81 83.08
18.01 0.91 16.44 48.12 0.30 14.34 2.10 87.22
18.01 1.20 21.64 48.12 0.39 18.77 2.88 86.71
18.01 1.48 26.68 48.12 0.48 23.24 3.44 87.09
18.00 1.77 31.85 48.11 0.58 27.81 4.04 87.31
18.00 2.06 37.03 48.11 0.68 32.47 4.56 87.69
Test Report PMP7899
6 April 17, 2015
18.00 2.34 42.19 48.11 0.77 36.99 5.20 87.67
18.00 2.64 47.54 48.10 0.87 41.70 5.83 87.73
18.00 2.94 52.95 48.10 0.96 46.37 6.58 87.57
5 Thermal Images
Thermal image was taken at 12Vin, 1A load when the board reaches equilibrium.
Test Report PMP7899
7 April 17, 2015
Thermal image was taken at 18Vin, 1A load when the board reaches equilibrium.
Thermal image was taken at 8Vin, 0.9A load when the board reaches equilibrium. Heat sink or air flow
is required if intended to run continuous at 8Vin/0.9A full load.
Test Report PMP7899
8 April 17, 2015
6 Waveform
6.1 Switching Waveform
8Vin, 1A load. Ch1 measures primary switching waveform, Ch2 measures secondary switching
waveform.
12Vin, 1A load. Ch1 measures primary switching waveform, Ch2 measures secondary switching
waveform.
Test Report PMP7899
9 April 17, 2015
18Vin, 1A load. Ch1 measures primary switching waveform, Ch2 measures secondary switching
waveform.
6.2 Output Ripple
8Vin, 1A load. Ch1 measures output ripple.
Test Report PMP7899
10 April 17, 2015
12Vin, 1A load. Ch1 measures output ripple.
18Vin, 1A load. Ch1 measures output ripple.
Test Report PMP7899
11 April 17, 2015
6.3 Load Transient
8Vin, 0.5A-1A load step. Ch1 measures output voltage, Ch4 measures output load current.
12Vin, 0.5A-1A load step. Ch1 measures output voltage, Ch4 measures output load current.
Test Report PMP7899
12 April 17, 2015
18Vin, 0.5A-1A load step. Ch1 measures output voltage, Ch4 measures output load current.
6.4 Start Up
8Vin, 1A load. Ch1 measures input voltage, Ch2 measures output voltage.
Test Report PMP7899
13 April 17, 2015
12Vin, 1A load. Ch1 measures input voltage, Ch2 measures output voltage.
18Vin, 1A load. Ch1 measures input voltage, Ch2 measures output voltage.
Test Report PMP7899
14 April 17, 2015
6.5 Short Circuit
8Vin, 0A load. Ch2 measures output voltage, Ch4 measures output current.
12Vin, 0A load. Ch2 measures output voltage, Ch4 measures output current.
Test Report PMP7899
15 April 17, 2015
60Vin, 0A load. Ch2 measures output voltage, Ch4 measures output current.
6.7 Bode Plot
8Vin, 1A load bode plot, 60.6 degrees phase margin, and 28.6dB gain margin.
Test Report PMP7899
16 April 17, 2015
12Vin, 1A load bode plot, 51.6 degrees phase margin, and 29.33dB gain margin.
18Vin, 1A load bode plot, 46.6 degrees phase margin, and 59dB gain margin.
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