ic-wkp iC-Haus, ic-wkp Datasheet

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ic-wkp

Manufacturer Part Number
ic-wkp
Description
15 V Cw P-type Laser Diode Driver
Manufacturer
iC-Haus
Datasheet
Copyright © 2008 iC-Haus
Pin numbers given for SO8 package only
iC-WKP
15 V CW P-TYPE LASER DIODE DRIVER
FEATURES
BLOCK DIAGRAM
Optimised for P-type laser diodes (case grounded)
CW operation up to 350 mA from 3 to 15 V supply voltage
Rapid soft start after power-on
Simple power adjustment via an external resistor
Control loop accuracy better than 2% with changes in
temperature, supply voltage and load current
Integrated reverse polarity protection for the iC and laser diode
Strong suppression of transients with small external
capacitors; integrated flyback path
Permanent shutdown with excessive chip temperature and
overcurrent (i.e. if the laser diode is damaged or the feedback
current path fails)
Second feedback input MDA also permits the operation of
N-type laser diodes
Modulation via the feedback inputs possible
Wide monitor current range from 2.5 µA to 6.25 mA
PACKAGES
APPLICATIONS
Laser diode modules
Laser diode pointers
Pilot lasers
Laser levels
Barcode readers
Distance measuring sensors
(thermal pad)
SO8-TP
http://www.ichaus.com
4 mm x 4 mm
Rev A5, Page 1/8
DFN10

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ic-wkp Summary of contents

Page 1

... V CW P-TYPE LASER DIODE DRIVER FEATURES Optimised for P-type laser diodes (case grounded) CW operation up to 350 mA from supply voltage Rapid soft start after power-on Simple power adjustment via an external resistor Control loop accuracy better than 2% with changes in temperature, supply voltage and load current ...

Page 2

... V CW P-TYPE LASER DIODE DRIVER DESCRIPTION iC-WKP is a driver for laser diodes in continuous wave (CW) operation with laser currents 350 mA from a wide power supply range 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 ...

Page 3

... V CW P-TYPE LASER DIODE DRIVER PACKAGES SO8tp, DFN10 JEDEC standard PIN CONFIGURATION SO8tp GND 3 AGND 4 MDK PIN CONFIGURATION DFN10 iC−WKP ... ...yyww The Thermal Pad connected to a Ground Plane on the PCB. Do not short-circuit pins AGND and ...

Page 4

... V CW P-TYPE LASER DIODE DRIVER ABSOLUTE MAXIMUM RATINGS Beyond these values damage may occur; device operation is not guaranteed. Item Symbol Parameter No. G001 VCC Voltage at VCC G002 I(VCC) Current in VCC G003 I(CI) Current in CI G004 I(LDA) Current in LDA G005 I(VCCA) Current in VCCA ...

Page 5

... V CW P-TYPE LASER DIODE DRIVER ELECTRICAL CHARACTERISTICS Operating Conditions: VCC = 3... 0.2...500 -40...125 °C unless otherwise stated Item Symbol Parameter No. Total Device 001 VCC Permissible Supply Voltage 002 I(LDA)m Permissible Laser Drive Current (closed control loop) 003 Idc(VCC) ...

Page 6

... Time Figure 1: Turn-on behaviour Turn-off behaviour iC-WKP works without a fixed undervoltage lockout, thus the laser diode forward voltage is the prime fac- tor determining the lowest possible supply voltage. If the voltage drops below this value, the output stage is forcibly saturated and the laser current decreases. ...

Page 7

... Cooling Laser diodes should be sufficiently cooled, particularly with the power-regulated operation of setups which use iC-WKP, for example. The power dissipation in the laser diode otherwise causes the diode to heat up and the level of efficiency to drop which the power control unit then compensates for by increasing the laser cur- rent ...

Page 8

... For technical support, information about prices and terms of delivery please contact: iC-Haus GmbH Am Kuemmerling 18 D-55294 Bodenheim GERMANY Appointed local distributors: Order Designation iC-WKP SO8-TP iC-WKP DFN10 Tel.: +49 (61 35) 92 92-0 Fax: +49 (61 35) 92 92-192 Web: http://www.ichaus.com E-Mail: sales@ichaus.com http://www.ichaus.de/support_distributors.php ...

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