(PDF) iC-WKL Datasheet PDF | iC-Haus





iC-WKL Datasheet PDF

Part Number iC-WKL
Description 2.4V CW LASER DIODE DRIVER
Manufacture iC-Haus
Total Page 7 Pages
PDF Download Download iC-WKL Datasheet PDF

Features: Datasheet pdf iC-WK, iC-WKL 2.4V CW LASER DIODE DRIVER FEATURES ° CW operation up to 70mA fr om 2.4..6V supply voltage and up to 4A with an external power transistor ° Ra pid soft start after power-on typical w ithin 70µs ° Simple power adjustment via the external resistor ° Control lo op accuracy better than 1% with changes in temperature, supply voltage and loa d current ° Integrated reverse polarit y protection for the iC and laser diode ° Strong suppression of transients wi th very small external capacitors; inte grated flyback path ° Permanent shutdo wn with excessive temperature and overc urrent (i.e. if the laser diode is dama ged or the feedback current path fails) ° Two feedback inputs permit all curr ent LD types to be used (M/P/N configur ations) ° Modulation via the feedback inputs is possible ° Wide monitor curr ent range from 10µA to 2.5mA Rev C2, Page 1/7 APPLICATIONS ° Battery-powere d LD modules ° LD Pointers ° Bar-code readers PACKAGES SO8 MSOP8 BLOCK DIAGRAM +2.4..+6V 6 VCC CVCC ...47nF.

Keywords: iC-WKL, datasheet, pdf, iC-Haus, 2.4V, CW, LASER, DIODE, DRIVER, stock, pinout, distributor, price, schematic, inventory, databook, Electronic, Components, Parameters, parts, cross reference, chip, Semiconductor, circuit, Electric, manual, substitute, Equivalent

iC-WKL datasheet
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-WKL datasheet
iC-WK, iC-WKL
2.4V CW LASER DIODE DRIVER
Rev C2, Page 2/7
DESCRIPTION
The iC-WK/L device is a driver for laser diodes in continuous wave operation which requires only four external
components. The wide power supply range of 2.4V to 6V and the integrated reverse battery protection allow
for battery operation with a minimum of two cells. A reversed battery connection destroys neither the iC nor
the laser diode.
The iC includes integrated circuitry protecting against destruction by ESD, excessive temperature and over-
current and a soft start which regulates the power and protects the laser diode when the power supply is
switched on. The iC also filters the laser diode power supply for transients.
The power supply is regulated and adapted for the laser diode used by an external resistor at MDA. The
monitor current acts as a reference and is regulated independent of the influence of temperature and supply
voltage (range: 10µA to 2.5mA). The capacitor at CI determines the recovery time constants and start-up time.
A second monitor input, pin MDK, allows the driver to be used for other types of laser diode configuration;
alternatively, it can be used as an analog modulation input (DC to a few kHz).
In the event of failure, such as overcurrent in the laser path with a lack of feedback, for example, a quick
power lockout is activated. The shutdown continues until power is reapplied, permitting a restart. The strain
on power packs and batteries is relieved and the laser class is retained even in the event of a disturbance.
IC-WK offers additional protection by means of spike detection at pin MDA. Should spike or oscillation occur
at pin MDA the power lockout is activated.
PACKAGES SO8, MSOP8 to JEDEC Standard
PIN CONFIGURATION SO8
(top view)
PIN CONFIGURATION MSOP8 (3mm)
PIN FUNCTIONS
No. Name Function
1 GND Ground
2 CI Capacitance for Power Control
3 AGND Reference Ground for CI, RM
4 MDK Monitor Input 2
(MD Cathode, modulation)
5 MDA APC Setup, Monitor Input 1
(MD Anode)
6 VCC +2.4 .. +6V Supply Voltage
7 LDA Laser Supply (LD Anode)
8 LDK Driver Output (LD Cathode)





Index : 0  1  2  3   4  5  6  7   8  9  A  B   C  D  E  F   G  H  I  J   K  L  M  N   O  P  Q  R   S  T  U  V   W  X  Y  Z
@ 2014 :: Datasheetspdf.com :: Semiconductors datasheet search & download site (Privacy Policy & Contact)