AAT2845
Four-Channel Backlight Driver with Dual LDOs
DC+
VOUT
1
2
3
C9
100µF
D1
D2
D3
D4
J1
Optional 100µF capacitor
to bypass lab supply
C7
0.1µF
20 19 18 17
U1
AAT2845
1
16
D2
D1
D4
2
3
4
5
6
15
14
13
12
11
ENLDO
EN/SET
C1+
ENL
OUTB
LDOB
IN
EN/SET
C1 1.0µF
C6
2.2µF
R10
160K
Programmed for 2.8V output
PGND
IN
C1-
OUTCP
R11
120K
C4
2.2µF
C3
1.0µF
7
8
9
10
C2
1.0µF
OUTA
C5
2.2µF
R8
60.4K
Programmed for 1.8V output
R9
120K
Figure 5: AAT2845 Section Schematic.
16
2845.2006.12.1.0