Cirrus Logic CS1631 - Manual (Page 32)

CS1630/31
32 DS954F3
6.8 Configuration 3 (Config3) – Address 35
7 6 5 4 3 2 1 0
STRING TT_MAX1 TT_MAX0 LED_ARG IPEAK2 IPEAK1 IPEAK0 -
Number Name Description
[7] STRING
Configures second stage series/parallel output channel configuration.
0 = Second stage configured as parallel strings
1 = Second stage configured with strings in series
[6:5] TT_MAX[1:0]
Configures the maximum measurable second stage switching cycle period.
00 = 51.15 s
01 = 102.35 s
10 = 153.55 s
11 = 204.75 s
[4] LED_ARG
Configures which channel is connected to the color LED string (the string with a
gain that is dependent on dim and temperature).
0 = Color LED string connected to channel 1
1 = Color LED string connected to channel 2
[3:1] IPEAK[2:0]
Configures the minimum measurable peak current level on the second stage
sense resistor when the gate drive is turned on along with the CLAMP[1:0] set-
ting. IPEAK[2:0] is an unsigned integer in the range of 0
value7. The voltage
on the FBSENSE pin that corresponds to the minimum peak current is calcu-
lated using the following formula:
[0] - Reserved
1.4
IPEAK[2:0] 1 +   16    15 +   CLAMP[1:0] 8     – 8  +
512
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