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User's Manual

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REV. 1.10/2002
RMT LtdRMT Ltd
RMT LtdRMT Ltd
DX6106
Fig. 3.28. Typical LED control circuit
DAC
DAC
Microcontroller
+
X2
6
X2
4
X2
5
X2
3
X2
1
R
E
C
R
S
R
G
R
G
DX6106 Optical Unit
It is advisable in the real design to use some number of
analog multiplexors to distribute, for example, the
signal of singe DAC into two OPs or output signal of
one OP into two MOSFET gates. It will enable to spare
some equipment.
essentially
The only current limiting factor is the = 0.22
Ohms sense resistor. (The MOSFET
resistance is negligible in comparison with ).It
The current limiting and stabilizing circuit must be
implemented into LED driving circuit. It is
because of the following reasons:
R
R
R
S
ON
S
3-26