iC-HK
155MHz LASER SWITCH
Rev 21.11.01, Page 3/13
Example 3:
1.
2.
Switching the laser current between
0mA, 100mA, 200mA and 300mA
More than two current levels
|
both channels
are required
100mA are provided by channel 1, 200mA by
channel 2 and 300mA by both channels
together
Similar to Example 2, here RK2 is chosen to
3S and V(CI) to 3V for I(LDK) = 200mA
As shown in Figure 3 of the data sheet the
corresponding value of RK1 is read off at ca.
9S for I(LDK) = 100mA and V(CI) = 3V
3.
4.
Fig. 7: Signal patterns for Example 3
With the circuit shown in Figure 8, a voltage of 3V at
pin CI, RK2 = 3S and RK1 = 9S a pulse pattern
similar to the one shown in Figure 7 can be obtained.
Fig. 8: Circuit with iC-HK for Example 3
ICHAUS [ IC-HAUS GMBH ]
