Datasheet

EVAL-ADM8843 Preliminary Technical Data
2 REV. PrC 02/05
Charge Pump
1x/1.5x/2x mode
Control
Logic
VCC
C4
Osc
Vref
+
-
LED Current
Control
Circuit
Current Controlled Sinks
Iset
GND
ADM8843
Vout
FB2
FB3
FB4
FB1
C3
C1 C2
Rset
Current
Control
1
Current
Control
2
Current
Control
3
Current
Control
4
CTRL1
CTRL2
MAIN
SUB
Figure 1. ADM8843 Functional Block Diagram
CTRL1 CTRL2 LED Operation
0 0 Sub Display Off / Main Display Off
0 1 Sub Display Off / Main Display On
1 0 Sub Display On / Main Display Off
1 1 Sub Display On / Main Display On
Figure 2. ADM8843 Digital Inputs Truth Table
10
11
12
9
1
2
3
4
56
7
8
13
14
15
ADM8843
TOP VIEW
(NOT TO SCALE)
16
GND
CTRL2
ISET
GND
GND
Figure 3. ADM8843 Pin Configuration