LM3533 Datasheet, PDF (39/53 Pages) Texas Instruments – Complete Lighting Power Solution for Smartphone Handsets

LM3533
TABLE 17. ALS ZONE PATTERN SCALER #1 (ADDRESS 0x29)
Bits [7:4]
ALS Pattern Scaler (Zone 4)
0000 = 1/16
0001 = 2/16
:
1111 = 16/16 (Default)
Bits [3:0]
ALS Pattern Scaler (Zone 3)
0000 = 1/16
0001 = 2/16
:
1111 = 16/16 (Default)
TABLE 18. ALS ZONE PATTERN SCALER #2 (ADDRESS 0x2A)
Bits [7:4]
ALS Pattern Scaler (Zone 2)
0000 = 1/16
0001 = 2/16
:
1111 = 16/16 (Default)
Bits [3:0]
ALS Pattern Scaler (Zone 1)
0000 = 1/16
0001 = 2/16
:
1111 = 16/16h (Default)
TABLE 19. ALS ZONE PATTERN SCALER #3 (ADDRESS 0x2B)
Bits [7:4]
Not Used
Bits [3:0]
ALS Pattern Scaler (Zone 0)
0000 = 1/16 (Default)
0001 = 2/16
:
1111 = 16/16
TABLE 20. OVP/BOOST FREQUENCY/PWM POLARITY SELECT (ADDRESS 0x2C)
Bits [7:4]
Not Used
Bit 3
PWM Polarity
0 = Active Low Polarity
1 = Active High Polarity
(Default)
Bit [2:1]
Boost OVP Select
00 = 16V (Default)
01 = 24V
10 = 32V
11 = 40V
Bit 1
Boost Frequency Select
0 = 500 kHz (Default)
1 = 1MHz
Bit 7
Not Used
TABLE 21. R_ALS SELECT REGISTER (ADDRESS 0x30)
Bits [6:0]
ALS Resistor Select Code
0000000 = ALS input is high impedance (Default)
0000001 = 200kΩ (10µA at 2V full-scale)
0000010 = 100kΩ (20µA at 2V full-scale)
:
:
:
1111110 = 1.587kΩ (1.26mA at 2V full-scale)
1111111 = 1.575kΩ (1.27mA at 2V full-scale)
The selectable codes are available which give a linear step in currents of 10uA per code based upon 2V/R_ALS. This gives a code
to resistance relationship of:
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