Electronic Components Datasheet Search |
|
IC-WKM Datasheet(PDF) 8 Page - IC-Haus GmbH |
|
IC-WKM Datasheet(HTML) 8 Page - IC-Haus GmbH |
8 / 9 page prel imin ary prel imin ary iC-WKM M-TYPE CW LASER DIODE DRIVER Rev C1, Page 8/9 APPLICATION NOTES Laser diode types In principle, all three laser diode types can be operated by iC-WKM. Figure 3: Operation of an M-type laser diode Figure 4: Operation of a P-type laser diode Figure 5: Operation of an N-type laser diode As iC-WKM has been optimised for use with M-type laser diodes, it is with this type of diode that the best functionality is achieved. This type of setup also en- ables the laser diode package to be connected to GND. With P-type laser diodes it is also possible to connect the laser diode package to GND. Here, however, the current mirror at MDK introduces a certain error to the automatic power control (c.f. Electrical Characteristics Nos. 108-110). Even N-type laser diodes can be operated by iC-WKM; iC-WKN, however, which has been optimised for use with these diodes, may be a better choice. Layout To prevent instability of the regulator an additional ca- pacitor (ca. 100 pF) must be positioned directly at the iC’s pin CI. Depending on the laser diode, capacitor CM with typ. 2 nF in parallel to RM may be required for stability. Pin AGND acts solely as a ground reference for the power regulator (CI and RM) and should not be short- circuited with GND externally. This could have a neg- ative effect on the control behavior and monitor func- tions. Cooling Laser diodes should be sufficiently cooled, particularly with the power-regulated operation of setups which use iC-WKM, 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 con- trol unit then compensates for by increasing the laser current. This in turn brings about a rise in power dissi- pation in the laser diode and thus also in temperature. In this instance the laser diode could be damaged (re- sulting in spottiness and an increase in operating cur- rent) or even destroyed before the overcurrent shut- down threshold in iC-WKM is reached. This applies in particular to blue laser diodes whose power dissipation is considerably higher than that of red laser diodes, for example, due to the higher forward voltage. This specification is for a newly developed product. iC-Haus therefore reserves the right to change or update, without notice, any information contained herein, design and specification; and to discontinue or limit production or distribution of any product versions. Please contact iC-Haus to ascertain the current data. Copying – even as an excerpt – is only permitted with iC-Haus approval in writing and precise reference to source. iC-Haus does not warrant the accuracy, completeness or timeliness of the specification on this site and does not assume liability for any errors or omissions in the materials. The data specified is intended solely for the purpose of product description. No representations or warranties, either express or implied, of merchantability, fitness for a particular purpose or of any other nature are made hereunder with respect to information/specification or the products to which information refers and no guarantee with respect to compliance to the intended use is given. In particular, this also applies to the stated possible applications or areas of applications of the product. iC-Haus conveys no patent, copyright, mask work right or other trade mark right to this product. iC-Haus assumes no liability for any patent and/or other trade mark rights of a third party resulting from processing or handling of the product and/or any other use of the product. |
Similar Part No. - IC-WKM |
|
Similar Description - IC-WKM |
|
|
Link URL |
Privacy Policy |
ALLDATASHEET.COM |
Does ALLDATASHEET help your business so far? [ DONATE ] |
About Alldatasheet | Advertisement | Datasheet Upload | Contact us | Privacy Policy | Link Exchange | Manufacturer List All Rights Reserved©Alldatasheet.com |
Russian : Alldatasheetru.com | Korean : Alldatasheet.co.kr | Spanish : Alldatasheet.es | French : Alldatasheet.fr | Italian : Alldatasheetit.com Portuguese : Alldatasheetpt.com | Polish : Alldatasheet.pl | Vietnamese : Alldatasheet.vn Indian : Alldatasheet.in | Mexican : Alldatasheet.com.mx | British : Alldatasheet.co.uk | New Zealand : Alldatasheet.co.nz |
Family Site : ic2ic.com |
icmetro.com |