EVL90WADP-LLCSR STMicroelectronics, EVL90WADP-LLCSR Datasheet - Page 13

• Manufacturer Part Number: EVL90WADP-LLCSR
• Description: EVAL BOARD PORTABLE PWR SUPPLY
• Manufacturer: STMicroelectronics
• Type: Power Factor Correctionr

Specifications of EVL90WADP-LLCSR

• Main Purpose: AC/DC, Primary and Secondary Side with PFC
• Outputs And Type: 1, Isolated
• Power - Output: 90W
• Voltage - Output: 19V
• Current - Output: 4.75A
• Voltage - Input: 90 ~ 264VAC
• Regulator Topology: Boost
• Frequency - Switching: 130kHz
• Board Type: Fully Populated
• Utilized Ic / Part: L6563H, L6599A, SRK2000
• Input Voltage: 90 V to 264 V
• Output Voltage: 19 V
• Dimensions: 65 mm x 155 mm
• Product: Power Management Modules
• Supply Current: 4.75 A
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With/related Products: L6563H, L6599A, SRK2000
• Other names: 497-10377

AN3014
4
Figure 6.
Functional check
Figure 6
operation. The selected switching frequency is approximately 100 kHz in order to achieve a
good trade-off between transformer losses and dimensions. The converter operates above
the resonance frequency.
turned on when resonant current is flowing through their body diodes and the drain-source
voltage is zero.
In
the rectifier MOSFETs are switched on and off according to the current flowing through
them.
sequence of the two stages can be noted: at power-on the L6563H and L6599A V
voltages increase up to the turn-on thresholds of the two ICs. The PFC starts and its output
voltage increases from the mains rectified voltage to its nominal value. In the meantime, the
L6599A is kept inactive by the LINE pin (pin 7) until the PFC voltage reaches the set
threshold. Then the resonant starts operating and the output voltage reaches the nominal
level.
Resonant stage oscillator at
230 V - 50 Hz - full load
Figure
Figure 9
and
8, typical waveforms relevant to the secondary side are shown. It can be noted that
Figure 7
shows the waveforms during startup at 90 Vac and full load. Here, the
are waveforms relevant to the resonant stage during steady state
Figure 7
Doc ID 16064 Rev 2
shows the resonant ZVS operation. Both MOSFETs are
Figure 7.
Resonant stage waveforms at
230 V - 50 Hz - full load
Functional check
CC
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