ic-wk iC-Haus, ic-wk Datasheet

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ic-wk

Manufacturer Part Number
ic-wk
Description
2.4 V Cw Laser Diode Driver
Manufacturer
iC-Haus
Datasheet
Copyright © 2006 iC-Haus
iC-WK, iC-WKL
2.4 V CW LASER DIODE DRIVER
FEATURES
BLOCK DIAGRAM
GND
+2.4..+6 V
CW operation up to 90 mA from 2.4 to 6 V supply voltage
Rapid soft start after power-on typical within 70 µs
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
(N/P/M configurations)
Modulation via the feedback inputs is possible
Wide monitor current range from 10 µA to 2.5 mA
iC-WK with additional spike detection at monitor input MDA
..47 nF..
CVCC
6
1
VCC
GND
suitable laser diode configurations: N, P, M
1
iC−WKL
D
MD
R
TRANSIENT
PROTECTION
LD
NQ
OVERCURRENT/
OVERTEMP.
MD
LD
iC−WK
FEEDBACK MON.
MD
+
LD
0.5 V
VREF
PACKAGES
APPLICATIONS
Battery-powered LD modules
LD Pointers
Laser levels
Bar-code readers
AGND
MDK
MDA
LDA
LDK
CI
SO8
7
4
5
2
8
3
..100 nF..
CLDA
CI
..1 uF..
http://www.ichaus.com
Rev D1, Page 1/8
MD
RM
200..50 k Ω
MSOP8
LD
CM
47 pF

Related parts for ic-wk

ic-wk Summary of contents

Page 1

... Two feedback inputs permit all current LD types to be used (N/P/M configurations) Modulation via the feedback inputs is possible Wide monitor current range from 10 µA to 2.5 mA iC-WK with additional spike detection at monitor input MDA BLOCK DIAGRAM 6 VCC +2.4..+6 V CVCC ...

Page 2

... V CW LASER DIODE DRIVER DESCRIPTION The iC-WK/L device is a driver for laser diodes in con- tinuous wave operation which requires only four ex- ternal components. The wide power supply range of 2 and the integrated reverse battery protec- tion allow for battery operation with a minimum of two cells ...

Page 3

... V CW LASER DIODE DRIVER ABSOLUTE MAXIMUM RATINGS No Destruction, correct function 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(LDK) Current in LDK G006 I(MDA) Current in MDA G007 I(MDK) ...

Page 4

... V CW LASER DIODE DRIVER ELECTRICAL CHARACTERISTICS Operating Conditions: VCC = 2.4... 200 ... -40...125 °C unless otherwise noted Item Symbol Parameter No. Total Device 001 VCC Permissible Supply Voltage 002 I(LDK)m Permissible Laser Drive Current (closed control loop) 003 Idc(VCC) Supply Current without load path closed control loop, I(MDK ...

Page 5

... Operating Conditions: VCC = 2.4... 200 ... -40...125 °C unless otherwise noted Item Symbol Parameter No. 207 Vt(MDA) Shutdown Threshold at MDA Control Release Flip-Flop 401 VCCen Set Threshold for Enable Flip-Flop 402 Toff Overtemperature Shutdown Conditions Tj °C iC-WK only Rev D1, Page 5/8 Fig. Unit Min. Typ. Max. 0. 0.6 1.9 V 125 150 °C ...

Page 6

... RM fail, the device is shutdown in less than 250 µs, provided that the supply voltage applied is high enough. When modulating or switching the laser current via pin MDK (see Application Notes), excessive Voltage oc- curring at pin MDA also causes a shut down (iC-WK only). Rev D1, Page 6/8 Phase IV Phase V ...

Page 7

... V CW LASER DIODE DRIVER APPLICATION NOTES Setting the output power The output power is simply set V(MDA) / I(MD); with V(MDA) = Item-No. 101 and I(MD) = mon- itor current at the desired operating point. RM should be combined from fixed resistor (max. output power) and a trimmer (calibration). ...

Page 8

... Order Designation SO8 iC-WK SO8 MSOP8 iC-WK MSOP8 SO8 iC-WKL SO8 MSOP8 iC-WKL MSOP8 iC-WK iCSY WK1D iC-WKL iCSY WK1D iC-WK iCSY WK2D iC-WKL iCSY WK2D iC-WK EVAL WK4D iC-WKL EVAL WK4D Tel.: +49 (61 35) 92 92-0 Fax: +49 (61 35) 92 92-192 Web: http://www.ichaus.com E-Mail: sales@ichaus.com Rev D1, Page 8/8 ...

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