AAT3172 Datasheet, PDF (10/14 Pages) Advanced Analogic Technologies – High Current LED Flash Driver Charge Pump IC

AAT3172
High Current LED Flash Driver Charge Pump IC
After shutdown, if only data is issued with the first
rising edge (i.e., 1 - 16 edges, no address given),
both current sinks will be programmed since the
default will be Address 0.
AS²Cwire Serial Interface Addressing
EN/SET
Address Rising Edges
0
17
1
18
2
19
3
20
4
21
5
22
6
23
Data Register
F1 and F2
Current Scale
F1 Current Scale
F2 Current Scale
HI/LO
ON/OFF
Reserved
Voltage/Current Mode
HI/LO Scale Register (Address 3)
Data
F1
F2
1
LO
LO
2
HI
HI
3
LO
HI
4
HI
LO
ON/OFF Register (Address 4)
Data
1
2
MODE
ON
OFF
Voltage Register (Address 6)
Data
1
2
MODE
Current
Voltage
Thermal Protection
The AAT3172 has a thermal protection circuit that
will shut down the charge pump if the die tempera-
ture rises above the thermal limit, as is the case
during a short circuit of the OUT pin.
AS²Cwire Serial Interface Timing
EN/SET
Address
Address
T _HI
T _LO
T_LAT
1
2
17
18
0
Data
T_LAT
1
2 . . . n <= 16
1
Data Reg 1
0
n-1
Data Reg 2
0
10
3172.2005.11.1.1