iC-WKL

iC-WK, iC-WKL 2.4V CW LASER DIODE DRIVER FEATURES ° CW operation up to 70mA from 2.4..6V supply voltage and up to 4A with an external power transistor ° Rapid soft start after power-on typical within 70µs ° Simple power adjustment via the external resistor ° Control loop accuracy better than 1% with changes in temperature, supply voltage and load current ° Integrated reverse polarity protection for the iC and laser diode ° Strong suppression of transients with very small external capacitors; integrated flyback path ° Permanent shutdown with excessive temperature and overcurrent (i.e. if the laser diode is damaged or the feedback current path fails) ° Two feedback inputs permit all current LD types to be used (M/P/N configurations) ° Modulation via the feedback inputs is possible ° Wide monitor current range from 10µA to 2.5mA Rev C2, Page 1/7 APPLICATIONS ° Battery-powered LD modules ° LD Pointers ° Bar-code readers PACKAGES SO8 MSOP8 BLOCK DIAGRAM +2.4..+6V 6 VCC CVCC ...47nF... TRANSIENT PROTECTION iC-WKL 1 D LDA 7 CLDA ..1µF.. MDK 4 - MDA 5 + VREF 0.5V CI 2 LDK 8 MD LD NQ R GND RGND 1 0..3 GND OVER CURRENT/ OVER TEMP. iC-WK FEEDBACK MON. AGND 3 CI RM 200 ..50k ..100nF.. CM 47pF suitable laser diode configurations: N, P, M MD LD MD LD LD MD © 2002 iC-Haus GmbH Integrated Circuits Am Kuemmerling 18, D-55294 Bodenheim Tel +49-6135-9292-0 Fax +49-6135-9292-192 http://www.ichaus.com iC-WK, iC-WKL 2.4V CW LASER DIODE DRIVER Rev C2, Page 2/7 D...