L6566ATR View Datasheet(PDF) - STMicroelectronics
Part Name
Description
MFG CO.
'L6566ATR' PDF : 51 Pages View PDF
Application information
L6566A
5.14
Summary of L6566A power management functions
It has been seen that the device is provided with a number of power management functions:
multiple operating mode upon loading conditions, protection functions, as well as interaction
with the PFC pre-regulator. To help the user familiarize themselves with these functions, in
the following tables all of the themes are summarized with their respective activation
mechanisms and the resulting status of the most important pins. This may be useful not only
for the correct use of the IC but also for diagnostic purposes: especially at the
prototyping/debugging stage, it is quite common to bump into unwanted activation of some
functions, and the following tables can be used as a sort of quick troubleshooting guide.
Table 5. L6566A light load management features
Feature
Description
Caused
by
IC
behavior
Vcc_restar
t
(V)
Consump. VREF
(Iqdis,mA) (V)
SS
VCOMP
OSC
FMOD
(V)
(V)
Burst
mode
Controlled
ON-OFF
operation for
low power
consumptio
n at light
load
VCOMP
<
VCOMPB
M - Hys
Pulse-
skipping
operation
PFC
manage
ment
PFC OFF at
light load,
ON at heavy
load
VCOMP
<
VCOMP
O
VCC_PFC
=0
VCOMP
<
VCOMPL
VCC_PFC
= VCC
N.A.
N.A.
1.34 mA
5
Unchang
ed
VCOMPBM
-HYS to
VCOMPBM
0/1
0
5
Unchang unchange
ed
d
1
0
VCC
40/52
Doc ID 13794 Rev 4
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