EVL6564-100W STMicroelectronics, EVL6564-100W Datasheet - Page 23

• Manufacturer Part Number: EVL6564-100W
• Description: BOARD EVAL PFC FOR L6564D
• Manufacturer: STMicroelectronics
• Type: Power Factor Correctionr

Specifications of EVL6564-100W

• Main Purpose: AC/DC, Primary Side
• Outputs And Type: 1, Non-Isolated
• Power - Output: 100W
• Voltage - Output: 400V
• Voltage - Input: 90 ~ 265VAC
• Regulator Topology: Boost
• Frequency - Switching: 40kHz
• Board Type: Fully Populated
• Utilized Ic / Part: L6564
• Input Voltage: 90 V to 265 V
• Output Voltage: 400 V
• Dimensions: 90 mm x 83 mm
• Product: Power Management Modules
• Lead Free Status / RoHS Status: Lead free by exemption / RoHS compliant by exemption
• Current - Output: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• For Use With/related Products: L6564
• Other names: 497-10164

AN3022
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Power management and housekeeping functions
Unlike similar PFC controllers with more pins, the housekeeping functions of the L6564 are
minimized but still there, and the device, in spite of the low pin count, has some main
functionalities that make it suitable to be implemented in high-end applications.
For example, in order to save power during light load operation or to put the converter in a
safe condition after detecting a failure of the DC-DC converter, a communication line can be
established between the cascade converter and the PFC via the disable function included in
the PFC_OK pin (pin #6). Needless to say, this operation assumes that the cascaded PFC
converter stage works as the master (thanks also to the integrated brownout function) and
the DC-DC stage as the slave or, in other words, that the PFC stage starts first, it powers
both controllers and enables/disables the operation of the downstream converter stage.
Several PWM controllers by STMicroelectronics have integrated some housekeeping
functions for the D2D and offer the possibility to interface directly the L6564 with the
downstream PWM controller via dedicated pins.
Should the residual consumption of the chip be an issue, it is also possible to cut off the
supply voltage. In this case, this operation assumes that the cascaded DC-DC converter
stage works as the master and the PFC stage as the slave or, in other words, that the DC-
DC stage starts first, it powers both controllers and enables/disables the operation of the
PFC stage.
The EVL6564-100W offers the possibility to test the disable function by connecting it to the
cascaded DC-DC converter using the J3 connector. The PFC_OK pin, Vcc and ground are
available via the series resistors R30 and R31.
Doc ID 16106 Rev 1
Power management and housekeeping functions
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