Isolated, Digital Output, Power Monitoring IC
with Zero-Crossing Detection, Overcurrent and Overvoltage Flagging
ACS37800
Register 0x0D/0x1D
Bits
7
Name
ichan_del_en
chan_del_sel
fault
Default Value
Description
0
0
Enable phase delay on voltage or current channel
Sets phase delay on voltage or current channel
Sets the overcurrent fault threshold
Sets the overcurrent fault delay
Error Code Correction
11:9
20:13
23:21
31:26
70
0
fltdly
ecc
–
ichan_del_en
Table 12: fltdly
Enables delay for either the voltage or current channel. Setting to
1 enables delay for the current channel. ichan_del_en is further
described in Table 9.
Range
Value
0
Units
µs
0
1
2
3
4
5
6
7
0
µs
4.75
9.25
13.75
18.5
23.25
27.75
µs
Table 9: ichan_del_en
µs
Range
Value
Units
LSB
µs
0
1
0 – voltage channel
1 – current channel
µs
LSB
µs
chan_del_sel
µs
Sets the amount of delay applied to the voltage or current channel (set
by ichan_del_en). chan_del_sel is further described in Table 10.
Table 10: chan_del_sel
Range
Value
Units
0 to 7
0 to 219
µs
fault
Over-current fault threshold. This is an unsigned 8-bit number
with an input range of 0 to 255, which equates to a fault range of
65% to 200% of IP. The factory setting of this field is 70. fault is
further described in Table 11.
Table 11: fault
Range
Value
Units
0 to 255
56 to 225
% of IP
fltdly
Fault delay setting of the amount of delay applied before flagging
a fault condition. fltdly is further described in Table 12.
29
Allegro MicroSystems
955 Perimeter Road
Manchester, NH 03103-3353 U.S.A.
www.allegromicro.com
ALLEGRO [ ALLEGRO MICROSYSTEMS ]
