Datasheet
L6563 - L6563A Application information
31/39
IC shutdown upon brownout can be easily realized as shown in Figure 46 The scheme on
the left is of general use, the one on the right can be used if the bias levels of the multiplier
and the R
FF
·C
FF
time constant are compatible with the specified brownout level and with the
specified holdup time respectively.
In Ta bl e 6 it is possible to find a summary of all of the above mentioned working conditions
that cause the device to stop operating.
Figure 46. Brownout protection (master PFC)
6.8 Summary of L6563/A idle states
.
10
RUN
AC mains
L6563
L6563A
VFF
L6563
L6563A
5
RUN
10
R
FF
C
FF
Table 6. Summary of L6563/A idle states
Condition
Caused or
revealed by
PWM_LATCH
(pin 8)
PWM_STOP
(pin 9)
Typical IC
consumption
IC behavior
UVLO Vcc < 8.7 V Open Open 50 µA Auto-restart
Feedback
disconnected
PFC_OK > 2.5 V Active (high) Open 180 µA Latched
Saturated
Boost Inductor
Vcs > 1.7 V
(L6563 only)
Active (high)
(L6563 only)
Open 180 µA
(L6563 only)
Latched
(L6563 only)
AC Brownout RUN < 0.52 V Open Active (low) 1.5 mA Auto-restart
Standby PFC_OK < 0.2 V Open Open 1.5 mA Auto-restart