AAT3170_08 Datasheet, PDF (10/15 Pages) Advanced Analogic Technologies – High Current LED Flash Driver Charge Pump IC

ChargePump^TM
PRODUCT DATASHEET
AAT3170
High Current LED Flash Driver Charge Pump IC
AAT3170 has been disabled. 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
Address
0
1
2
3
4
5
6
EN/SET
Rising Edges
17
18
19
20
21
22
23
Data Register
F1 and F2 Current Scale
F1 Current Scale
F2 Current Scale
HI/LO
ON/OFF
Timer
Voltage/Current Mode
HI/LO Scale Register (Address 3)
Data
1
2
3
4
F1
F2
LO
LO
HI
HI
LO
HI
HI
LO
ON/OFF Register (Address 4)
Data
1
2
MODE
ON
OFF
Timer Register (Address 5)
Data
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
On-Time
T (sec) = 10 · C_T (μF)
16/16 x T
15/16 x T
14/16 x T
13/16 x T
12/16 x T
11/16 x T
10/16 x T
9/16 x T
8/16 x T
7/16 x T
6/16 x T
5/16 x T
4/16 x T
3/16 x T
2/16 x T
1/16 x T
Voltage Register (Address 6)
Data
1
2
MODE
Current
Voltage
Thermal Protection
The AAT3170 has a thermal protection circuit that will
shut down the charge pump if the die temperature rises
above the thermal limit, as is the case during a short
circuit of the OUT 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-1
Data Reg 2
0
10
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3170.2007.11.1.2