EVL250W-ATX80PL STMicroelectronics, EVL250W-ATX80PL Datasheet - Page 14

• Manufacturer Part Number: EVL250W-ATX80PL
• Description: BOARD DEMO SMPS L6591/L6563S
• Manufacturer: STMicroelectronics
• Series: VIPer™ plusr

Specifications of EVL250W-ATX80PL

• Main Purpose: Power Supply, ATX
• Outputs And Type: 3, Isolated
• Power - Output: 250W
• Voltage - Output: 12V, 5V, 3.3V
• Current - Output: 13.5A, 12A, 8A
• Voltage - Input: 88 ~ 264VAC
• Regulator Topology: Flyback
• Frequency - Switching: 80kHz
• Board Type: Fully Populated
• Utilized Ic / Part: L6563S, L6591, L6727, VIPer27H
• Input Voltage: 88 VAC to 264 VAC
• Output Voltage: 3.3 V, 5 V, 12 V
• Maximum Operating Temperature: + 60 C
• Operating Supply Voltage: 80 VAC to 264 VAC
• Output Power: 250 W
• Product: Power Management Development Tools
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With/related Products: L6563S PFC controller
• Other names: 497-10596

Asymmetrical half bridge operation
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Figure 8.
Ch1: LVG pin voltage (yellow)
Ch3: HVG pin voltage (purple)
Ch4: Primary winding current (green)
The key waveforms at the secondary side are shown in
while the current is swapped between the two SR MOSFETs, the voltage at their drain is
nearly zero. The time required for current swap is directly proportional to the primary
leakage inductance. As mentioned before, the effect of this phenomenon is the duty cycle
losses.
AHB transitions detail @ 20 % rated load
Doc ID 17402 Rev 1
Figure
9. It is interesting to note that,
AN3203