EVL6563S-400W STMicroelectronics, EVL6563S-400W Datasheet - Page 21

• Manufacturer Part Number: EVL6563S-400W
• Description: EVAL BOARD FOR L6563(400W)
• Manufacturer: STMicroelectronics
• Type: Motor / Motion Controllers & Driversr

Specifications of EVL6563S-400W

• Main Purpose: Power Management, Power Factor Correction
• Embedded: No
• Utilized Ic / Part: L6563
• Primary Attributes: 400W Power Factor Correction and Preregulator Combination
• Secondary Attributes: Transition Mode & Active Tracking Boost Function.
• Maximum Operating Temperature: + 60 C
• Product: Power Management Development Tools
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With/related Products: L6563S
• Other names: 497-10488

AN2994
2.6
Figure 32. EVL6563S-400W start-up
CH1: Q1/Q2 drain voltage
CH2: Output voltage
CH3: Pin #13 - gate drive
CH4: Pin #14 - Vcc voltage
Start-up at light loads
The board, as it is, is able to properly handle an output load as low as 12 W. With lower load
levels, the system will not start up correctly at high lines because burst pulses last so long
that the Vcc voltage drops below the UVLO of the L6563S. In such conditions, if the load
increases suddenly, the PFC output voltage will drop until the IC resumes normal operation.
When the L6563S is supplied from an external source (typically, it is the auxiliary voltage
that powers the controller of the downstream converter or an auxiliary power supply), the
minimum load that can be handled properly goes to virtually zero. The start-up behavior at
the minimum load (12 W) is reported in
connected to the auxiliary winding of the inductor is working properly.
Figure 33
(15 V). The PFC regulates the output voltage perfectly.
at 265 V, 50 Hz, 30 mA load
shows the circuit start-up at no load, with the L6563S powered by an external Vcc
Doc ID 15796 Rev 2
Figure
Figure 33. EVL6563S-400W start-up at 265 V,
CH1: Q1/Q2 drain voltage
CH2: Output voltage
CH3: Pin #13 - gate drive
CH4: Pin #14 - Vcc voltage
32. It can be noted that the self-supply circuit
Test results and significant waveforms
50 Hz, no load and with external
Vcc
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