AAT3169_08 Datasheet, PDF (10/13 Pages) Advanced Analogic Technologies – High Efficiency 1X/1.5X/2X Charge Pump for White LED Applications

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PRODUCT DATASHEET
AAT3169
High Efficiency 1X/1.5X/2X Charge Pump for White LED Applications
Low Current Register (Address 4)
Data
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
Main Low
Current On
No
No
No
No
No
No
No
No
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Sub Low
Current On
No
No
No
No
Yes
Yes
Yes
Yes
No
No
No
No
Yes
Yes
Yes
Yes
Current
115µA
175µA
280µA
400µA
115µA
175µA
280µA
400µA
115µA
175µA
280µA
400µA
Auto-Disable Feature
AAT3169 is equipped with an auto-disable feature for
each LED channel. After the IC is enabled and started
up, a test current of 120µA (typical) is forced through
each sink channel. The channel will be disabled if the
voltage of that particular SINK pin does not drop to a
certain threshold. This feature is very convenient for
disabling an unused channel or during an LED fail-short
event.
Thermal Protection
The AAT3169 has a built-in thermal protection circuit
that will shut down the charge pump if the die tempera-
ture rises above the thermal limit, as would be the case
during a short circuit of the OUTCP pin.
AS²Cwire Serial Interface Timing
EN/SET
Address
T_HI
T_LO
T_LAT
1
2
17
18
Address
0
Data
T_LAT
1
2 . . . n <= 16
1
Data Reg 1
0
n
Data Reg 2
0
10
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3169.2008.03.1.3