TELECOM SOLUTIONS New Tel-Note to Correspond with Bourns® Design Kit H-852 LTE RRU POWER MODULE Current or Voltage Adjustment Objective Product Design Kit 4G/LTE RRU power modules often require precise current and/or voltage output adjustment. The purpose of this note is to introduce an efficient and low-cost solution for the adjustment of 4G/LTE RRU power modules. A miniature SMD trimming potentiometer can be added to circuitry to adjust either the voltage output or precision current in 4G/LTE RRU power modules. Riverside, California - January 21, 2015 - Bourns is pleased to announce the release of the LTE RRU Power Module Tel-Note to correspond with the existing Design Kit H-852. Design Kit H-852 contains a series of Bourns® Model 3224 SMD Trimpot® Trimming Potentiometers with various resistance levels. ge Mobile broadband power supplies often need adjustment of output voltage n to compensate for unit to unit variations or variations due to differences in t® system wiring. The Bourns® Model 3224 Series of Surface Mount Trimpot® Trimming Potentiometers are ideal for applications where board space is limited and accurate voltage adjustment is required. 3224W-1-102E *Additional part numbers included in Design Kit: • 3224W-1-103E • 3224W-1-503E • 3224J-1-102E • 3224J-1-103E • 3224J-1-503E Voltage Adjustable Circuit • • • • • Low profile 4 mm SMD trimmer Sealed for board processing, consistent with Bourns guidelines Multiturn cermet element Wide range of resistance values Wiper pre-set at 50 % ± 10 % of actual total resistance for quick adjustment • RoHS compliant** • Halogen free*** **RoHS Directive 2002/95/EC Jan. 27, 2003 including annex and RoHS Recast 2011/65/E 2011/65/EU June 8, 2011. considers a product to be ***Bourns follows the prevailing definition of “halogen free” in the industry. Bourns consi is 900 ppm or “halogen free” if (a) a)) the he Bromine he Br Brom omin oomi min m ine (Br) content content is 900 ppm or less; (b) the Chlorine (Cl) content con less;; and nd ((c) nd c) th c) the hee total h to tot ttota ota otal ota tal aall Brom Bro Brom omine inee (Br) ine in ((B (Br Br) Brrr)) and Chlorine B Chlorine (Cl) content is 1500 ppm or less. Specifications Specific Bromine are subject to change cha hange hang h aange nge n ge without w wi witho withou wit with ithout thou hout hou ho h ooutt notice. nottice. ice. ceee.. The ce. The device de d vice vic ice cee characteristics ccharacter ch h istics and parameters in this Bourns Tel Note can and do vary in applications device differen different differe diff d iff ffer ffe fferent ff erent rent rre en ntt appli ap app appl ppli pppl ppllliicca cation cations ations atio aat tiiions tion ttions ioo s and an and nd ac aactual actu cttual tua tu ual u ua all devi de dev devic evvic ev evic evice iice cee performance pperformance may vary over time. orr emai email: em eemail ema m :p mai protec pro protecti pr [email protected] rotec rot rotecti ro rote otec t ction@ on@bo on@bourns on@bou on@b on n@bourns n@b @bourns ourns urns rns.com m IOUT 3224W-1-102E* ADJ Features & Benefits www.bourns.com www.b ww www.bo ww.b ww.bo ww w.bo w .bo bourns.c urns. urn urns ur uurns.c rns. n om om VOUT R1 Voltage / Current Source VIN 4 mm SMD Trimpot® Trimming Potentiometer: 3224W-1-102E* Fo Fo orr more mor mo in informati info iinform nfo nformati formati format rmati mation, mat mati on, on n, go g to: to: to For information, H-852 Precision Current Limiter Solution Americas: Am EMEA: EM VIN Voltage / Current Source VOUT R1 ADJ R2 3224W-1-102E* The schematic shown here illustrates the application protection and does not constitute the complete circuit design. Customers should verify actual device performance in their specific applications. Tel +1-951 781-5500 Fax +1-951 781-5700 Tel +36 88 520 390 Fax +36 88 520 211 Asia-Pacific: Tel +886-2 256 241 17 Fax +886-2 256 241 16 COPYRIGHT© 2014 • BOURNS, INC. • 12/14 • PSG • XX/K1450 “Bourns” and “Trimpot” are registered trademarks of Bourns, Inc. in the U.S. and other countries. The new Tel-Note and existing Design Kit are available on Bourns’ websitee at www.bourns.com. Tel-Note Solution LTE RRU Power Module Current or Voltage Adjustment Design Kit H-852 Components Included 3224W-1-102E 3224W-1-103E 3224W-1-503E 3224J-1-102E 3224J-1-103E 3224J-1-503E Should you have any questions or need additional information, please feel free to contact Customer Service/Inside Sales. “Bourns” is a registered trademark of Bourns, Inc. in the United States and other countries. K1468