EVL6563S-250W STMicroelectronics, EVL6563S-250W Datasheet - Page 30

• Manufacturer Part Number: EVL6563S-250W
• Description: EVAL BOARD FOR L6563(250W)
• Manufacturer: STMicroelectronics
• Type: Power Factor Correctionr

Specifications of EVL6563S-250W

• Main Purpose: Power Management, Power Factor Correction
• Embedded: No
• Utilized Ic / Part: L6563
• Primary Attributes: 250W Power Factor Correction and Preregulator Combination
• Secondary Attributes: Transition Mode & Active Tracking Boost Function.
• Board Size: 88 mm x 116 mm
• Maximum Operating Temperature: + 50 C
• Operating Supply Voltage: 90 V to 265 V
• Product: Power Management Modules
• Dimensions: 88 mm x 116 mm
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With/related Products: L6563S
• Other names: 497-10489

Application information
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Figure 40. Tracking boost block
Figure 41. Tracking output voltage vs Input voltage characteristic with TBO
Inductor saturation detection
Boost inductor's hard saturation may be a fatal event for a PFC pre-regulator: the current up-
slope becomes so large (50-100 times steeper, see
propagation delay the current may reach abnormally high values. The voltage drop caused
by this abnormal current on the sense resistor reduces the gate-to-source voltage, so that
the MOSFET may work in the active region and dissipate a huge amount of power, which
leads to a catastrophic failure after few switching cycles.
However, in some applications such as ac-dc adapters, where the PFC pre-regulator is
turned off at light load for energy saving reasons, even a well-designed boost inductor may
Doc ID 16116 Rev 4
Figure 42
) that during the current sense
L6563S