EVAL6599-90W STMicroelectronics, EVAL6599-90W Datasheet - Page 7

• Manufacturer Part Number: EVAL6599-90W
• Description: EVAL BOARD FOR L6599
• Manufacturer: STMicroelectronics
• Type: Power Factor Correctionr

Specifications of EVAL6599-90W

• Main Purpose: AC/DC, Primary Side and PFC
• Outputs And Type: 1, Isolated
• Power - Output: 90W
• Voltage - Output: 19V
• Current - Output: 4.7A
• Voltage - Input: 90 ~ 264VAC
• Regulator Topology: Resonant
• Frequency - Switching: 90kHz
• Board Type: Fully Populated
• Utilized Ic / Part: L6563, L6599
• Input Voltage: 90 V to 264 V
• Output Voltage: 19 V
• Dimensions: 78 mm x 174 mm
• Product: Power Management Modules
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With/related Products: L6599
• Other names: 497-5497

AN2321
2
2.1
Test results
Efficiency measurements
Table 1
load conditions. Efficiency is then calculated. For all measurements, both at full load and no
load operation, the input power has been measured by a digital power meter, Yokogawa WT-
210. Particular attention has to be paid when measuring input power at full load in order to
avoid measurement errors due to the voltage drop on cables and connections. Therefore
please connect the WT210 voltmeter termination to the board input connector. For the same
reason please measure the output voltage at the output connector or use the remote detect
option of your active load for a correct voltage measurement.
Table 1.
Table 2.
In
powering the board at the two nominal input mains voltages. The measures have been done
after 30 minutes of warm-up at maximum load. The high efficiency of the PFC working in
transition mode and the very high efficiency of the resonant stage working in ZVS, provides
for an overall efficiency better than 90%. This is a significant high number for a two-stage
converter delivering an output current of 4.7 amps, especially at low input mains voltage
where the PFC conduction losses increase. Even at lower loads, the efficiency remains still
high.
Table
Vout [V]
Vout [V]
18.95
18.95
18.97
18.98
18.99
18.99
19.00
18.95
18.96
18.97
18.98
18.99
19.00
19.00
and
1,
Table 2
Table 2
Efficiency measurements -
Efficiency measurements -
and
show the output voltage measurements at nominal mains with different
Figure
Iout [A]
Iout [A]
4.71
3.72
1.71
0.25
4.71
3.72
1.71
0.25
2.7
1.0
0.5
2.7
1.0
0.5
2, the overall circuit efficiency is measured at different loads,
Pout [W]
Pout [W]
Vin=115 Vac
Vin=230 Vac
89.25
70.49
51.22
32.46
18.99
89.25
70.53
51.22
32.46
18.99
9.50
4.75
9.50
4.75
Pin [W]
Pin [W]
99.13
78.00
56.55
36.00
21.70
11.30
97.23
76.74
55.85
35.57
21.30
10.87
5.86
5.77
Efficiency (%)
Efficiency (%)
Test results
90.04
90.38
90.57
90.16
87.51
84.03
81.06
91.80
91.91
91.71
91.24
89.15
87.40
82.32
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