iC-HK, iC-HK
B
155 MHz LASER SWITCH
Rev F1, Page 7/8
DESCRIPTION OF FUNCTIONS
Laser current dependency of V(Cl), RK1, RK2
Depending on the laser diode different diode currents
are necessary to obtain the required laser power. The
values for V(CI), RK1 and RK2 can be determined for
the required diode current at room temperature from
the opposite diagram. A parallel to the x axis must be
drawn through the desired diode current. Either RKx
can be obtained for a required value of V(CI) or the
respective value of V(VI) can be achieved for a given
RKx.
I(LDK)
300 mA
RKx= 0
Ω
2
250
RKx= 1
Ω
200
RKx= 2
Ω
150
1
RKx= 3
Ω
RKx= 4
Ω
RKx= 5
Ω
RKx= 6
Ω
RKx= 8
Ω
RKx= 10
Ω
100
50
RKx= 15
RKx= 20
RKx= 30
RKx= 50
Ω
Ω
Ω
Ω
Thermal Shutdown
iC-HK/B is protected by an integrated thermal shut-
down feature. When the shutdown temperature is
reached both channels are locked.
0
1
1.2
1.4
1.6
3
1.8
2
2.2
2.4
2.6 V
Figure 9: Diode current vs. V(Cl) at Tj = 27 °C
1.75
V(CI)
APPLICATION NOTES
Application notes for iC-HK are available as a separate document.
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As a general rule our developments, IPs, principle circuitry and range of Integrated Circuits are suitable and specifically designed for appropriate use in technical
applications, such as in devices, systems and any kind of technical equipment, in so far as they do not infringe existing patent rights. In principle the range of
use is limitless in a technical sense and refers to the products listed in the inventory of goods compiled for the 2008 and following export trade statistics issued
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