EVL6563H-100W STMicroelectronics, EVL6563H-100W Datasheet - Page 24

• Manufacturer Part Number: EVL6563H-100W
• Description: EVAL BOARD FOR L6563 (100W)
• Manufacturer: STMicroelectronics
• Type: Power Factor Correctionr

Specifications of EVL6563H-100W

• Main Purpose: Power Management, Power Factor Correction
• Embedded: No
• Utilized Ic / Part: L6563
• Primary Attributes: 100W Power Factor Correction and Preregulator Combination
• Secondary Attributes: Transition Mode & Active Tracking Boost Function.
• Product: Power Management Modules
• Supply Current: 5 mA
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With/related Products: L6563H
• Other names: 497-10379; 497-10379-NHD

Application information
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Application information
Overvoltage protection
Normally, the voltage control loop keeps the output voltage Vo of the PFC pre-regulator
close to its nominal value, set by the ratio of the resistors R1 and R2 of the output divider. A
pin of the device (PFC_OK) has been dedicated to monitor the output voltage with a
separate resistor divider (R3 high, R4 low, see
the voltage at the pin reaches 2.5 V if the output voltage exceeds a preset value, usually
larger than the maximum Vo that can be expected.
Example: V
51 kΩ.
When this function is triggered, the gate drive activity is immediately stopped until the
voltage on the pin PFC_OK drops below 2.4 V. Notice that R1, R2, R3 and R4 can be
selected without any constraints. The unique criterion is that both dividers have to sink a
current from the output bus which needs to be significantly higher than the bias current of
both INV and PFC_OK pins.
Figure 38. Output voltage setting, OVP and FFP functions: internal block diagram
O
= 400 V, V
OX
= 434 V. Select: R3 = 8.8 MΩ; then: R4 = 8.8 MΩ ·2.5/(434-2.5) =
Doc ID 16047 Rev 3
Figure
38). This divider is selected so that
L6563H