iC-WJ, iC-WJZ
LASER DIODE DRIVER
FEATURES
♦
Laser diode driver for continuous and intermittent operation
(CW to 300kHz) up to 250mA
♦
Averaging control of laser power
♦
Simple adjustment of the laser power via external resistor
♦
Adjustable watchdog at the switching input to protect the
laser diode
♦
Smooth starting after power-on
♦
Driver shutdown in the case of overtemperature and
undervoltage
♦
Single 5V supply
♦
Simple circuitry
◊
iC-WJ
for laser diodes with 50..500µA monitor current
◊
iC-WJZ
for laser diodes with 0.15..1.5mA monitor current
APPLICATIONS
♦
Driver with protective functions
for CW laser diodes
PACKAGES
iC-WJ, iC-WJZ
SO8
BLOCK DIAGRAM
3
REF
DRIVER STAGE
1
VCC
5
+5V
C1
100µF
REFERENCE
C3
THERMAL
ISET
SHUTDOWN
4
RSET
10kΩ
6
INPUT
IN
VCC
REF
AMD
74HCxx
2nF
KLD
8
LD MD
R1
12Ω
POWER DOWN
7
2
4
WATCHDOG
1:1 iC-WJ
1:3 iC-WJZ
iC-WJ/WJZ
CWD
2
CWD
CI
3
CI
100nF..470nF
usable LD models
GND
1
©1997
iC-Haus GmbH
Integrated Circuits
Am Kuemmerling 18, D-55294 Bodenheim
Rev A1
Tel +49-6135-9292-0
Fax +49-6135-9292-192
http://www.ichaus.com
ROITHNER [ Roithner LaserTechnik GmbH ]
