Table 26. maximum write time – Rainbow Electronics MAX16071 User Manual
Page 42
12-Channel/8-Channel, Flash-Configurable System
Managers with Nonvolatile Fault Registers
MAX16070/MAX16071
42 _____________________________________________________________________________________
The capacitor value depends on V
IN
and the time delay
required, t
FAULT_SAVE
. Use the following formula to cal-
culate the capacitor size:
C = (t
FAULT_SAVE
x I
CC(MAX)
)/(V
IN
- V
DIODE
- V
UVLO
)
where the capacitance is in Farads and t
FAULT_SAVE
is in
seconds, I
CC(MAX)
is 14mA, V
DIODE
is the voltage drop
across the diode, and V
UVLO
is 2.7V. For example, with
a V
IN
of 14V, a diode drop of 0.7V, and a t
FAULT_SAVE
of 153ms, the minimum required capacitance is 202FF.
Table 26. Maximum Write Time
Figure
14. Power Circuit for Shutdown During Fault Conditions
Figure
15. Graphical User Interface Screenshot
R6Dh[1:0]
VALUE
DESCRIPTION
MAXIMUM
WRITE TIME
(ms)
00
Save flags and ADC
readings
153
01
Save flags
102
10
Save ADC readings
153
11
Do not save anything
—
MAX16070
MAX16071
V
CC
C
V
IN
GND