AAT1271A Datasheet, PDF (16/19 Pages) Advanced Analogic Technologies – 1.5A Step-Up Current Regulator for Flash LEDs

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PROPRIETARY INFORMATION PRODUCT DATASHEET
AAT1271A
1.5A Step-Up Current Regulator for Flash LEDs
DC+
DC -
Movie Mode Control
Safety Timer
A/B Control
JP6
MCU
SW1
024 ₁₃₅
SW2
024 ₁₃₅
SW3
02 ₁
4 35
R5 R6 R7
10K 10K 10K
U2
1 _VDD
2 _GP5
3 _GP4
4 _GP3
VSS
8
GP 0
7
GP 1
6
GP 2
5
PIC12F675C3
JP5
EN /SET
C4
1μF
R9
330
LED2
GRN
JP7
0
R8
330
LED 1
RED
R2
100K
R10
10k
FLEN
024 ₁₃
5
SW4
JP3
R3
100k
FLINH
0
24 135
SW5
JP4
VOUT
R4
100k
( opt)
JP1 JP2
0
0
L1 1μH
C1
2.2μF
C3
74 nF
U1
1
2
CT
EN/SET
RSET
FLA
14
13
3
4
FLEN
AGND
FLGND
FLB
12
11
5
6
IN
SW
FLINH
GND
10
9
7 _PGND
OUT
8
AAT1271A TDFN33-14
D1
D2
R1
107k
C2
2.2μF
L1
C1, C2
C3
D1, D2
Cooper Bussmann SD3812-1R0-R, 1μH, 2.69A, 48mΩ
Murata GRM188R71A225KE15 2.2μF, 0603, X7R, 10V
Murata GRM155R71A743KA01, 74nF, 0402, X7R, 10V
Lumiled LXCL-PWF4 or equivalent
Figure 2: AAT1271A Evaluation Board Schematic.
Figure 3: AAT1271A Evaluation Board
Top Side Layout.
Figure 4: AAT1271A Evaluation Board
Bottom Side Layout.
16
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1271A.2008.07.1.0