CS1630 Datasheet, PDF (43/56 Pages) Cirrus Logic – 2-Channel TRIAC Dimmable LED Driver IC

CS1630/31
6.32 Configuration 50 (Config50) – Address 82
7
6
5
OVP_CNT2 OVP_CNT1 OVP_CNT0
4
OVP_LAT
3
2
1
0
OVP_TYPE OVP_BLANK2 OVP_BLANK1 OVP_BLANK0
Number
[ 7:5 ]
[4]
[3]
[ 2:0 ]
Name
OVP_CNT[2:0]
OVP_LAT
OVP_TYPE
OVP_BLANK[2:0]
Description
Sets the second stage OVP fault counter threshold used when declaring a
fault.
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
500 ns.
0 = Fixed time blanking mode
1 = T2 offset blanking mode.
Configures fixed time blanking interval t_OVP for output open protection,
OVP. The value is an unsigned integer in the range of 0value7.
t_OVP = 1s + OVP_BLANK [2:0]  0.5s 
6.33 Configuration 51 (Config51) – Address 83
7
RESTART5
6
RESTART4
5
RESTART3
4
RESTART2
3
RESTART1
2
1
0
RESTART0 FAULT_SLOW FAULT_SHDN
Number
[ 7:2 ]
[1]
[0]
Name
RESTART[5:0]
FAULT_SLOW
FAULT_SHDN
Description
Set fault restart time T_Restart for second stage faults that are set as unlatched
type. If slow restart bit FAULT_SLOW is enabled, then
else
T_Restart = RESTART[5:0]  40.96ms
T_Restart = RESTART[5:0]  25.6s
Configures slow restart for second stage faults that are set at unlatched type.
0 = Disable slow restart; use 25.6s timer for restart time countdown
1 = Enable slow restart; use 40.96ms timer for restart time countdown
Selects which stages to disable when a fault event occurs in the second stage.
0 = Shutdown second stage only
1 = Shutdown boost stage and second stage
DS954F2
43