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NZQFN28 Datasheet(PDF) 18 Page - Roithner LaserTechnik GmbH |
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NZQFN28 Datasheet(HTML) 18 Page - Roithner LaserTechnik GmbH |
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18 / 20 page  iC-NZ FAIL-SAFE LASER DIODE DRIVER Rev B2, Page 18/20 ing RLDA. iC-HK is a fast, spike-free laser switch with which up to 1.4 A can be driven in pulsed operation. An iC-HK can be connected to each channel on iC-NZ so that a maximum laser pulse current of 4.2 A can be achieved (depending on pulse frequency, duty cy- cle and thermal dissipation). To this end pins CIx (x: L, M, H) on iC-NZ must be connected to the CI inputs of the relevant iC-HK and iC-NZ inputs LENx to iC-HK inputs EN1 and EN2 (Figure 16). Individual levels are set as described above in Switching up to three laser power levels. LENM LENH R1 CLDA Q1 RSMD LD MD RML Monitor Safety Diode RVDD SDIS SMD VDD EN RGND LDA GND CREF CIL CIM LDKL CIH LDKH CIH RSI REGEN LENH LENL LENM RMDH AGND CIL MDL RMH RMDM RMM RLDA CIM iC−NZ LDK CI AGND2 AGND1 GND VDD EN2 EN1 iC−HK LDKM LDK CI AGND2 AGND1 GND VDD EN2 EN1 iC−HK LDK CI AGND2 AGND1 GND VDD EN2 EN1 iC−HK VDD LENL LENM LENH LENL LENL Figure 16: Extending the laser current |
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