CS1630 Datasheet, PDF (48/56 Pages) Cirrus Logic – 2-Channel TRIAC Dimmable LED Driver IC

CS1630/31
6.39 Configuration 58 (Config58) – Address 90
7
6
5
4
3
2
1
0
SHUTDWN3 SHUTDWN2 SHUTDWN1 SHUTDWN0 LOW_SAT2 LOW_SAT1 LOW_SAT0 DIM_TEMP
Number
[ 7:4 ]
[ 3:1]
Name
SHUTDWN[3:0]
LOW_SAT[2:0]
Description
Configures the 8-bit code value corresponding to temperature threshold
Temp_Shutdown. If the temperature exceeds this threshold, the device enters an
external overtemperature state and shuts down.
CODE_TEMPShutdown = CODE_TEMPWakeup + SHUTDWN [3:0]  4 
The wakeup temperature code is configured as an offset from the eOTP tem-
perature code and the shutdown temperature code is configured as an offset
from the wakeup temperature code; Temp_eOTP < Temp_Wakeup < Temp_Shutdown
Sets the lower saturation limit for the 8-bit temperature code provided to the
color system from the fast low pass filter before it is used for polynomial com-
putations.The lower saturation limit is given by:
LOW_SAT[2:0] + 1   5
Configures the external overtemperature protection (eOTP) dim with tempera-
ture feature, which decreases the second stage dim level once the tempera-
ture measured using the external NTC connected to pin eOTP exceeds the
[0]
DIM_TEMP temperature threshold set using eOTP[4:0], Temp_eOTP (see “Configuration 59
(Config59) – Address 91” on page 48).
0 = Disable
1 = Enable
6.40 Configuration 59 (Config59) – Address 91
7
eOTP4
6
eOTP3
5
eOTP2
4
eOTP1
3
eOTP0
2
HI_SAT2
1
HI_SAT1
0
HI_SAT0
Number
[ 7:3 ]
[ 2:0 ]
Name
eOTP[4:0]
HI_SAT[2:0]
Description
Configures 8-bit code value CODE_TEMPeOTP corresponding to the tempera-
ture Temp_eOTP set point at which the eOTP dim with temperature feature is
enabled.
CODE_TEMPeOTP = 80 + eOTP [4:0]  4 
Sets the higher saturation limit for the 8-bit temperature code provided to the
color system before it is used for polynomial computations.
000 = CODE_TEMPShutdown
001 = 100
010 = 120
011 = 140
100 = 160
101 = 180
110 = 200
111 = 220
48
DS954F2