PRODUCT DATASHEET
AAT1272
TM
SwitchReg
1.5A Step-Up Current Regulator for Flash LEDs
SCL
SDA
VOUT
FLEN
R2
JP1
0
JP2
0
10k
VCC
D1
D2
Enable
U1
1
14
CT
EN
RSET
2
3
13
12
FLA
FLGND
FLB
JP3
L1
FLEN
AGND
IN
4
5
6
7
11
10
SDA
9
SW
SCL
1μH
8
PGND
OUT
C1
AAT1272 TDFN33-14
C3
74nF
2.2μF
R1
107k
C2
2.2μF
L1
C1, C2 Murata GRM188R71A225KE15, 2.2μF, 0603, X7R, 10V
C3 Murata GRM155R71A743KA01, 74nF, 0402, X7R, 10V
D1, D2 Lumiled LXCL-PWF4 or equivalent
Cooper Bussmann SD3812-1R0-R, 1μH, 2.69A, 48mΩ
Figure 8: AAT1272 Evaluation Board Schematic.
DC-
DC+
VCC
JP7
MCU
JP8
0
R5 R6 R7
10K 10K 10K
R8
10k
C4
1μF
U2
1
2
8
7
VDD
VSS
FLEN
SW1
GP5
GP0
SW4
0
0
3
4
6
5
0
R3
Movie Mode Control
Safety Timer
2 1
GP4
GP1
GP2
2 1
4 3
5
4 3
5
JP4
330
GP3
R4
SW2
SW3
PIC12F675
330
2 1
4 3
LED 1
RED
5
R9
100k
LED 2
GRN
A /B Control
0
2 1
4 3
5
R10
10k
R11
10k
FLEN
SCL
SDA
JP5
JP6
SCL
SDA
Figure 9: AAT1272 Evaluation Board MCU Section Schematic.
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1272.2009.04.1.2
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