iC-WJ, iC-WJZ
LASER DIODE DRIVER
Rev C1, Page 1/12
FEATURES
o
Laser diode driver for continuous and pulsed operation (CW to
300 kHz) up to 250 mA
o
Averaging control of laser power
o
Simple adjustment of the laser power via external resistor
o
Adjustable watchdog at the switching input to protect the laser
diode
o
Soft-start after power-on
o
Driver shutdown with overtemperature and undervoltage
o
Single 5 V supply
o
Simple circuitry
o
iC-WJ
for laser diodes with 50 to 500 µA monitor current
o
iC-WJZ
for laser diodes with 0.15 to 1.5 mA monitor current
APPLICATIONS
o
General purpose laser diode
driver
PACKAGES
SO8
MSOP8
BLOCK DIAGRAM
3
REF
REFERENCE
DRIVER STAGE
1
VCC
5
+5 V
100
µF
C1
C3
ISET
4
INPUT
IN
VCC
REF
AMD
74HCxx
THERMAL
SHUTDOWN
KLD
8
2 nF
LD MD
R1
12Ω
RSET
10 kΩ
6
POWER DOWN
7
2
4
WATCHDOG
1:1 iC−WJ
1:3 iC−WJZ
iC−WJ/WJZ
CWD
2
CWD
CI
3
CI
100 nF..470 nF
usable LD models
GND
1
Copyright © 2006 iC-Haus
ICHAUS [ IC-HAUS GMBH ]
