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.

Thermal Shutdown

iC-HK/B is protected by an integrated thermal shut-

down feature.

When the shutdown temperature is

reached both channels are locked.

RKx= 0

Ω

RKx= 1

Ω

RKx= 2

Ω

RKx= 3

Ω

RKx= 4

Ω

RKx= 5

Ω

RKx= 6

Ω

RKx= 8

Ω

RKx= 10

Ω

RKx= 15

Ω

RKx= 20

Ω

RKx= 30

Ω

RKx= 50

Ω

I(LDK)

V(CI)

1

1.2

1.4

1.6

1.8

2

2.2

2.4

2.6 V

0

50

100

150

200

250

300 mA

3

1

2

Figure 9: Diode current vs. V(Cl) at Tj = 27 °C

APPLICATION NOTES

Application notes for iC-HK are available as a separate document.

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