KIA6967S View Datasheet(PDF) - KEC
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KIA6967S Datasheet PDF : 3 Pages
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KIA6967S
PRECAUTION FOR USE AND APPLICATION METHOD
VCC
VIN
CS
RS
I
RD
I CC
I 05
I 04
I 03
I 02
I 01
9
6
4
3
2
1
VCC
VCC
8
-
AMP
+
+
+
+
+
+
C5
C4
C3
C2
C1
-
-
-
-
-
1
VREF 2
R5
R4
R3
R2
R1
GND
7
5
Rf
Cf
1. Setting of Turn-on Level
Turn-on input level can be set through changing the voltage gain(GV) of the input amplifier. This voltage gain is determined by
the external resistor (Rs, Rf) and obtained by the equation below.
Rf
GV=20log Rs (use in the range of GV=0 20dB)
When Gv=0dB (Rs=Rf=100k ), the turn-on level at fifth LED is 958.3mVrms(Typ.) For turning on the fifth LED with the arbitrarily
set input level (VIN), use the following equation to set Rs and Rf.
Rf = 958.3mVrms (Use the resistor of Rf=56k or over)
Rs
VIN
2. Setting of Power Dissipation and Limiting Resistor
Since the output of this IC is driver by constant current, all the output current (Io1 5) are dissipated in the IC.
Therefore, set the limiting resistor (RD) so that the power dissipation (PD) may not exceed the maximum rating because of the
ambient temperature.
PD = VCC ICC + (VCC - RD I-VF) Io1 +
+ (VCC - RD
Total output current : I = Io1 + Io2 + Io3 + Io4 + Io5
LED forward voltage : VF=1.5V
I-VF) Io5
2006. 2. 23
Revision No : 0
3/3
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