AAT2842INJ-EE-T1 Advanced Analog Technology, Inc., AAT2842INJ-EE-T1 Datasheet - Page 3

• Manufacturer Part Number: AAT2842INJ-EE-T1
• Description: High-Current Charge Pump with S2Cwire Control and Dual LDO for Backlight and Flash
• Manufacturer: Advanced Analog Technology, Inc.

Pin Descriptions (continued)
Pin Configuration
2842.2007.09.1.2
Pin #
EP
24
25
26
27
28
AGND
BSET
FSET
Symbol
REF
FBB
FENS
BENS
BL1
BL4
BL3
BL2
CT
1
2
3
4
5
6
7
28
TQFN44-28-0.4
8
Description
Flash enable and serial control input. FENS is the on/off control for the flash and the S
input to serially control the flash LED brightness relative to the maximum current set by the
resistor at FSET.
Backlight enable and serial control input. BENS is the on/off control for the backlight and the
S
set by the resistor at BSET.
Backlight LED 4 current sink. BL4 controls the current through Backlight LED 4. Connect the
cathode of Backlight LED 4 to BL4. If not used, connect BL4 to OUT.
Backlight LED 3 current sink. BL3 controls the current through Backlight LED 3. Connect the
cathode of Backlight LED 3 to BL3. If not used, connect BL3 to OUT.
Backlight LED 2 current sink. BL2 controls the current through Backlight LED 2. Connect the
cathode of Backlight LED 2 to BL2. If not used, connect BL2 to OUT.
Exposed paddle (bottom); connect to PGND as closely as possible to the device.
27
9
(Top View)
2
Cwire input to serially control the backlight LED brightness relative to the maximum current
10
26
11
25
12
24
23
13
22
14
21
20
19
18
17
16
15
FL3
FL4
PGND
IN
C2-
C2+
ENL
Control and Dual LDO for Backlight and Flash
High-Current Charge Pump with S
AGND
BSET
FSET
N.B. Not recommended for new designs.
REF
FBB
BL1
CT
1
2
3
4
5
6
7
TQFN44-28-0.45
28
8
(Top View)
27
9
10
26
11
25
12
24
23
13
14
22
21
20
19
18
17
16
15
FL3
FL4
PGND
IN
C2-
C2+
ENL
AAT2842
2
Cwire™
2
Cwire
3