LM3537_13 Datasheet, PDF (24/33 Pages) Texas Instruments – 8-Channel WLED Driver with Four Integrated LDOs

LM3537
SNVS634B – JUNE 2011 – REVISED MAY 2013
www.ti.com
Hex
Addr.
B0
Register Name
GROUP B
BRIGHTNESS
C0 LDO ENABLE
C1 LDO1 VOUT
C2 LDO2 VOUT
C3 LDO3 VOUT
C4 LDO4 VOUT
Table 5. Control Register Map (continued)
Bit(s)
[5:3]
[2:0]
[3]
[2]
[1]
[0]
[4:0]
[4:0]
[4:0]
[4:0]
Read/W Default Value
rite
After Reset
Bit Mnemonic and Description
R/W xx000xxx
alsZT
Sets the Brightness Zone boundary used to enable and disable
Group B diodes based upon ambient lighting conditions.
R/W xxxxx000
dxb
Sets Brightness for Group B. 8 steps, 111 = Fullscale.
R/W xxxx0xxx
en_ldo4
'1' = Regulator 4 enabled.
'0' = Regulator 4 disbaled.
R/W xxxxx0xx
en_ldo3
'1' = Regulator 3 enabled.
'0' = Regulator 3 disbaled.
R/W xxxxxx0x
en_ldo2
'1' = Regulator 2 enabled.
'0' = Regulator 2 disbaled.
R/W xxxxxxx0
en_ldo1
'1' = Regulator 1 enabled.
'0' = Regulator 1 disbaled.
R/W xxx11000
ldo1_vout
Regulator 1 output voltage programming. See Table 4 for voltage
options.
R/W xxx01100
ldo2_vout
Regulator 2 output voltage programming.
R/W xxx01100
ldo3_vout
Regulator 3 output voltage programming.
R/W xxx11000
ldo4_vout
Regulator 4 output voltage programming.
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