ic-wj iC-Haus, ic-wj Datasheet - Page 2

• Manufacturer Part Number: ic-wj
• Description: Laser Diode Driver
• Manufacturer: iC-Haus

iC-WJ, iC-WJZ
LASER DIODE DRIVER
DESCRIPTION
The iC-WJ and iC-WJZ devices are driver ICs for
laser diodes in continuous and pulsed operation up
to 300 kHz. The laser diode is activated via switching
input IN. A control to the mean value of the optical
laser power and integrated protective functions en-
sure nondestructive operation of the sensitive semi-
conductor laser.
The IC contains protective diodes to prevent destruc-
tion due to ESD, a protective circuit to guard against
overtemperature and undervoltage and a soft-start
for the laser diode driver to protect the laser diode
when switching on the supply voltage.
PACKAGES SO8, MSOP8 to JEDEC Standard
PIN CONFIGURATION SO8
(top view)
PIN CONFIGURATION MSOP8
(top view)
CWD
GND
ISET
CI
CWD
ISET
GND
CI
1
2
3
4
1
KLD
AMD
IN
VCC
8
7
6
5
KLD
IN
AMD
VCC
PIN FUNCTIONS
No. Name Function
An external resistor at ISET is utilised to adapt the
power control to the laser diode being used. The ca-
pacitor at CI determines the recovery time constants
and the start-up time.
A watchdog circuit monitors the switching input IN.
If IN remains low longer than preset by the capac-
itor at CWD, the capacitor of the power control is
discharged at pin CI. This ensures that the current
through the laser diode during the next high pulse at
input IN is not impermissibly high.
1 GND
2 CWD Capacitor for Watchdog
3 CI
4 ISET
5 VCC
6 IN
7 AMD
8 KLD
Ground
Capacitor for Power Control
Attachment for RSET
5 V Supply Voltage
Input
Anode Monitor Diode
Cathode Laser Diode
Rev C1, Page 2/12