CS1630 Datasheet, PDF (35/56 Pages) Cirrus Logic – 2-Channel TRIAC Dimmable LED Driver IC

CS1630/31
6.14 Channel 1 Output Current (CH1CUR) – Address 41
7
6
5
4
3
2
1
0
2⁷
2⁶
2⁵
2⁴
2³
2²
2¹
2⁰
CH1CUR sets the target output current for channel 1. The register value plus bit CH1CURMSB forms an un-
signed integer in the range of 0value511.
6.15 Configuration 10 (Config10) – Address 42
7
BUCK3
6
BUCK2
5
BUCK1
4
BUCK0
3
RE1_ZCD2
2
RE1_ZCD1
1
0
RE1_ZCD0 CH2CURMSB
Number
[ 7:4 ]
[ 3:1 ]
Name
Description
BUCK[3:0]
Configures buck topology. The value is an unsigned integer in the range of
0  value 15.
0 = Normal buck configuration
1 = Tapped buck ratio of one which is equivalent to a normal buck
configuration
2-15 = Tapped buck configuration where the ratio is equal to N.
Configures fixed time delay T_{RE1ZCD(delay)} for zero-current detection (ZCD)
comparator to account for the delay on the rising edge of ZCD for channel 1.
RE1_ZCD[2:0]
The value is an unsigned integer in the range of 0value7. The delay is
defined by:
T_{RE1ZCDdelay} = RE1_ZCD[2:0]  50ns
[0]
CH2CURMSB
Most significant bit for the CH2CUR register (see "Channel 2 Output Current
(CH2CUR) – Address 43" on page 35).
6.16 Channel 2 Output Current (CH2CUR) – Address 43
7
6
5
4
3
2
1
0
2⁷
2⁶
2⁵
2⁴
2³
2²
2¹
2⁰
CH2CUR sets the target output current for channel 2. The register value plus bit CH2CURMSB forms an un-
signed integer in the range of 0value511.
DS954F2
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