EVL6566A-75WES4 STMicroelectronics, EVL6566A-75WES4 Datasheet - Page 21

• Manufacturer Part Number: EVL6566A-75WES4
• Description: BOARD DEMO FOR L6563/LL6566A
• Manufacturer: STMicroelectronics
• Type: Power Factor Correctionr

Specifications of EVL6566A-75WES4

• Main Purpose: AC/DC, Primary and Secondary Side with PFC
• Outputs And Type: 1, Isolated
• Power - Output: 75W
• Voltage - Output: 19V
• Current - Output: 4A
• Voltage - Input: 90 ~ 264VAC
• Regulator Topology: Flyback
• Board Type: Fully Populated
• Utilized Ic / Part: L6563, L6566A, TSM1014
• Input Voltage: 90 V to 264 V
• Output Voltage: 19 V
• Dimensions: 78 mm x 170 mm
• Product: Power Management Modules
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Frequency - Switching: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• For Use With/related Products: L6563S, L6566A
• Other names: 497-8834

AN2941
Figure 20. Flyback open loop at 230 V-50 Hz
CH1: VFF voltage
CH2: Vcc
HV startup circuit turns on and begins to operate periodically in order to keep VCC between
VCCON and VCCON-0.5 V (
If R37 is shorted, the impedance externally connected to pin #15 (VFF) is lower and the
voltage in case of OVP cannot reach the 5+2VBE threshold, so the L6566A restarts after
VCC has dropped below 5 V (
operation is also stopped because the L6566A stops the PFC via the Vcc_PFC pin.
Additionally, to improve the immunity against temporary disturbances (needed for example
in case of immunity tests), an internal logic activates the protection after the OVP has been
detected for 4 consecutive switching cycles.
half load
Figure 22. Flyback open loop - restart option 230 Vac 50 Hz - half load
CH1: VFF voltage
CH2: Vcc
CH3: ZCD voltage
CH4: Output voltage
Figure 21
Figure 22
Doc ID 15447 Rev 3
) maintaining the IC latched.
Figure 21. Flyback open loop at 230 V-50 Hz
CH1: VFF voltage
CH2: Vcc
). In case of L6566A OVP intervention, the L6563S
CH3: ZCD voltage
CH4: Output voltage
half load
CH3: ZCD voltage
CH4: Output voltage
Functional check
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