L6563STR STMicroelectronics, L6563STR Datasheet - Page 26

• Manufacturer Part Number: L6563STR
• Description: IC PFC CTRLR TRANSITION 14SOIC
• Manufacturer: STMicroelectronics

Specifications of L6563STR

• Mode: Discontinuous (Transition)
• Current - Startup: 90µA
• Voltage - Supply: 10.3 V ~ 22.5 V
• Operating Temperature: -25°C ~ 125°C
• Mounting Type: Surface Mount
• Package / Case: 14-SOIC (3.9mm Width), 14-SOL
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Frequency - Switching: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• Other names: 497-10148-2

Application information
26/43
The twice-mains-frequency (2
peak amplitude that, with good approximation, is given by:
where f
ripple, related to the amplitude of its 2
Figure 37
amount of maximum desired 3rd harmonic distortion. Note that there is a minimum value for
the time constant R
occur. In fact, the twice-mains-frequency ripple across CFF under steady state conditions
must be lower than the minimum line drop detection threshold (V
Therefore:
Always connect R
floating or connected directly to ground.
Figure 37. R
R
FF
· C
L
FF
is the line frequency. The amount of 3rd harmonic distortion introduced by this
shows a diagram that helps choose the time constant R
[s]
current
0.01
FF
0.1
10
1
·C
0.1
FF
FF
FF
and C
as a function of 3rd harmonic distortion introduced in the input
•
C
FF
FF
below which improper activation of the VFF fast discharge may
to the pin, the IC will not work properly if the pin is either left
•
Doc ID 16116 Rev 4
f
L
R
) ripple appearing across C
FF
f = 60 Hz
Δ
⋅
L
D
C
V
3
•
FF
FF
f
%
L
component, will be:
>
=
=
1
2
2
D %
+
V
2
π
3
1
Δ
f 4
MULTpk
V
f
L
V
100
L
MULTpk
R
f 4
VFF
R
FF
L
FF
f = 50 Hz
_
L
C
_
C
min
_
min
FF
max
FF
−
1
FF
is triangular with a peak-to-
VFF_min
FF
·C
FF
= 40 mV).
10
based on the
L6563S