iC-WK
2.4V CW LASER DIODE DRIVER
FEATURES
° CW operation up to 60mA from 2.4..6V supply voltage ° Rapid soft start after...
iC-WK
2.4V CW LASER DIODE DRIVER
FEATURES
° CW operation up to 60mA from 2.4..6V supply
voltage ° Rapid soft start after power-on ° 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 protects against transients ° 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 ° Extended temperature range available as an option
Rev A1, Page 1/12
APPLICATIONS ° Battery-powered LD modules ° LD Pointers
PACKAGES
(MSOP8)
SO8
BLOCK DIAGRAM
+2.4..+5.5V
6 VCC
CVCC
...47nF...
TRANSIENT PROTECTION
1 D
LDA 7
CLDA ..1µF..
MDK 4
- MDA 5
+
VREF 0.5V
CI 2
LDK 8
MD LD
NQ R
iC-WK
OVER CURRENT
OVER TEMP.
CI RM 200 ..50k
..100nF..
GND
1 GND
AGND 3
suitable laser diode configurations: N, P, M
MD LD MD LD
LD MD
© 2000
iC-WK
2.4V CW LASER DIODE DRIVER
Rev A1, Page 2/12
DESCRIPTION
The iC-WK device is a driver for laser diodes in continuous wave operation which requires only four external components. The broad power supply range of 2.4V to 6V and the integrated rev...
