Datasheet
Table Of Contents
- Figure 1. Block diagram
- 1 Description
- 2 Maximum ratings
- 3 Pin connection
- 4 Electrical characteristics
- 5 Typical electrical performance
- Figure 3. IC consumption vs. VCC
- Figure 4. IC consumption vs. TJ
- Figure 5. VCC Zener voltage vs. TJ
- Figure 6. Startup and UVLO vs. TJ
- Figure 7. Feedback reference vs. TJ
- Figure 8. E/A output clamp levels vs. TJ
- Figure 9. UVLO saturation vs. TJ
- Figure 10. OVP levels vs. TJ
- Figure 11. Inductor saturation threshold vs. TJ
- Figure 12. Vcs clamp vs. TJ
- Figure 13. ZCD sink/source capability vs. TJ
- Figure 14. ZCD clamp level vs. TJ
- Figure 15. R discharge vs. TJ
- Figure 16. Line drop detection threshold vs. TJ
- Figure 17. VMULTpk - VVFF dropout vs. TJ
- Figure 18. PFC_OK threshold vs. TJ
- Figure 19. PFC_OK FFD threshold vs. TJ
- Figure 20. Multiplier characteristics at VFF = 1 V
- Figure 21. Multiplier characteristics at VFF = 3 V
- Figure 22. Multiplier gain vs. TJ
- Figure 23. Gate drive clamp vs. TJ
- Figure 24. Gate drive output saturation vs. TJ
- Figure 25. Delay to output vs. TJ
- Figure 26. Start-up timer period vs. TJ
- 6 Application information
- 7 Application examples and ideas
- Figure 34. Demonstration board EVL6564-100W, wide-range mains: electrical schematic
- Figure 35. L6564 100W TM PFC: compliance to EN61000-3-2 standard
- Figure 36. L6564 100W TM PFC: compliance to JEITA-MITI standard
- Figure 37. L6564 100 W TM PFC: input current waveform at 230 - 50 Hz - 100 W load
- Figure 38. L6564 100W TM PFC: input current waveform at 100 V - 50 Hz - 100 W load
- 8 Package mechanical data
- 9 Order codes
- 10 Revision history
DocID16202 Rev 5 21/33
L6564 Application information
33
The twice-mains-frequency (2 f
L
) ripple appearing across C
FF
is triangular with a peak-to-
peak amplitude that, with good approximation, is given by:
Equation 1
where f
L
is the line frequency. The amount of 3
rd
harmonic distortion introduced by this
ripple, related to the amplitude of its 2
f
L
component, will be:
Equation 2
Figure 29 shows a diagram that helps choose the time constant R
FF
· C
FF
based on the
amount of maximum desired 3
rd
harmonic distortion. Note that there is a minimum value for
the time constant R
FF
· C
FF
below which improper activation of the V
FF
fast discharge may
occur. In fact, the twice-mains-frequency ripple across C
FF
under steady state conditions
must be lower than the minimum line drop detection threshold (V
FF_min
= 40 mV).
Therefore:
Equation 3
Always connect RFF and CFF to the pin, the IC will not work properly if the pin is either left
floating or connected directly to ground.
Figure 29. R
FF
· C
FF
as a function of 3
rd
harmonic distortion introduced in the input
current
FFFFL
MULTpk
FF
CRf41
V2
V
FFFFL
3
CRf2
100
%D
min_L
min_VFF
max_MULTpk
FFFF
f4
1
V
V
2
CR
D %
3
0.1110
0.01
0.1
1
10
f = 50 Hz
L
f = 60 Hz
L
R · C [s]
FFFF