CS1630/31
6.32 Configuration 50 (Config50) – Address 82
7
6
5
4
3
2
1
0
OVP_CNT2
OVP_CNT1
OVP_CNT0
OVP_LAT
OVP_TYPE OVP_BLANK2 OVP_BLANK1 OVP_BLANK0
Number
Name
Description
Sets the second stage OVP fault counter threshold used when declaring a
fault.
[7:5]
[4]
OVP_CNT[2:0]
OVP_LAT
0 = Force OVP fault (debug only)
1-7 = Number of times an OVP fault has to occur consecutively before
the IC will enter a fault state.
Configures second stage OVP fault type.
0 = Unlatched fault
1 = Latched fault
Selects the type of blanking for the second stage OVP. When bit
OVP_TYPE is set to T2 offset, the blanking time is always equal to the cor-
responding channel’s previous T2 switching cycle time minus an offset of
500ns.
[3]
OVP_TYPE
0 = Fixed time blanking mode
1 = T2 offset blanking mode.
Configures fixed time blanking interval t
for output open protection,
OVP
OVP. The value is an unsigned integer in the range of 0value7.
tOVP = 1s + OVP_BLANK[2:0] 0.5s
[2:0]
OVP_BLANK[2:0]
6.33 Configuration 51 (Config51) – Address 83
7
6
5
4
3
2
1
0
RESTART5
RESTART4
RESTART3
RESTART2
RESTART1
RESTART0 FAULT_SLOW FAULT_SHDN
Number
Name
Description
for second stage faults that are set as unlatched
Set fault restart time T
Restart
type. If slow restart bit FAULT_SLOW is enabled, then
TRestart = RESTART[5:0] 40.96ms
[7:2]
RESTART[5:0]
else
TRestart = RESTART[5:0] 25.6s
Configures slow restart for second stage faults that are set at unlatched type.
0 = Disable slow restart; use 25.6s timer for restart time countdown
1 = Enable slow restart; use 40.96ms timer for restart time countdown
[1]
FAULT_SLOW
FAULT_SHDN
Selects which stages to disable when a fault event occurs in the second stage.
0 = Shutdown second stage only
[0]
1 = Shutdown boost stage and second stage
DS954F2
43
APEX [ CIRRUS LOGIC ]
