AAT2847IML-EE-T1 Advanced Analog Technology, Inc., AAT2847IML-EE-T1 Datasheet - Page 13

• Manufacturer Part Number: AAT2847IML-EE-T1
• Description: Four-Channel Backlight Driver with Dual LDOs
• Manufacturer: Advanced Analog Technology, Inc.

ChargePump
Low Current Operation (Address 4)
All four LED channels are programmed to the same low
current level by writing to Address 4 followed by any
Data between, and including, 1 to 4. This operational
mode is especially useful for low current applications
where a continuous low current state is maintained for a
substantial length of time.
2847.2008.05.1.2
Table 3: Current Scale Settings—Address 3.
Table 4: Low Current Settings—Address 4.
Data
1
2
3
4
Data
1
2
3
4
TM
Address
EN/SET
DATA
DATA
3
0
Low Current Mode
Current Scale
20mA Scale
30mA Scale
15mA Scale
Figure 2: AS
1
mA
0.5
1.0
1.5
2.0
2
w w w . a n a l o g i c t e c h . c o m
Address
T
LO
19
2
0
Cwire Serial Interface Timing.
T
HI
Four-Channel Backlight Driver with Dual LDOs
20
T
LAT
Independent LED Current Control
(Address 5)
Independent LED control allows for individual LEDs to be
enabled and disabled to form custom arrangement of
active LEDs. To enable independent control write Address
5 with Data between, and including, 1 to 16.
1
1
Data
Table 5: Independent LED Control Settings—
10
11
12
13
14
15
16
1
2
3
4
5
6
7
8
9
1
2 . . .
Data
D4
off
off
off
off
off
off
off
off
on
on
on
on
on
on
on
on
n ≤ 16
3
PRODUCT DATASHEET
Address 5.
T
LAT
D3
off
off
off
off
off
off
off
off
on
on
on
on
on
on
on
on
AAT2847
n
D2
on
on
off
off
on
on
off
off
on
on
off
off
on
on
off
off
D1
on
off
off
off
off
off
off
off
off
on
on
on
on
on
on
on
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