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IC-WKP Datasheet, PDF (2/10 Pages) IC-Haus GmbH – 15 V CW P-TYPE LASER DIODE DRIVER | |||
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iC-WKP
15 V CW P-TYPE LASER DIODE DRIVER
Rev A6, Page 2/10
DESCRIPTION
iC-WKP is a driver for laser diodes in continuous
wave (CW) operation with laser currents of up to
350 mA from a wide power supply range of up to 15 V
which requires only four external components. The
driver is optimised for P-type laser diodes and allows
the connection of the laser diode case to ground.
The iC includes integrated circuitry protecting against
destruction by ESD, excessive temperature and over-
current plus a soft start of the regulator to protect the
laser diode when the power supply is switched on.
The iC also ï¬lters the laser diode power supply for
transients.
The regulator is adapted to the laser diode by an ex-
ternal resistor at MDK. The monitor current acts as
a reference and is regulated independent of the in-
ï¬uence of temperature and supply voltage (range:
2.5 µA to 6.25 mA). The capacitor at CI determines
the control time constants and start-up time.
A second monitor input, pin MDA, allows the driver
to be used for N-type laser diode conï¬guration; alter-
natively, it can be used as an analogue 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 persists
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 dis-
turbance.
iC-WKP offers additional protection by means of
spike detection at pin MDK. Should spikes or oscilla-
tion occur at pin MDK the power lockout is activated
after a certain time-out.
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