PRODUCT DATA SHEET P2470 DC-DC Full Bridge Transformer Features Applications ∗ ∗ ∗ ∗ ∗ Isolated RS-485 interface ∗ LTC 1535, MAX3553E and MXL1535E circuits ∗ Power across safety barrier 1250Vrms Isolation Surface Mount RoHS compliant Wide operating temperature DESCRIPTION P2470 is an isolation transformer for use with LTC1535, MAX3535E and MXL1535E isolated RS-485 transceivers. ETALDOC 882/2 Page 1 of 4 P2470 is compliant with RoHS Directive 2002/95/EC, and suitable for lead-free and conventional placement and reflow. July 2007 P2470 SPECIFICATIONS Electrical Values at T = 25ºC, unless otherwise stated. Parameter Conditions Min Typ Max Units Primary Inductance 1-4, 100kHz 250mV 382 500 711 µH Turns ratio 1-4 : 5-6 : 6-8 - 1.0 : 1.375 : 1.375 - - DC resistance 1-4 5-8 - - 0.62 2.5 Ω Ω Dielectric strength Pri : sec, pri : core Sec : core 1250 500 - - Vrms Vdc Operating range Ambient temperature -40 - +85 ºC TYPICAL APPLICATION Typical Application Fig. 1 5 1 + 6 10µF 4 8 P2470 2 ETALDOC 882/2 3 11 LTC 1535/MAX3535E/MXL1535E Page 2 of 4 14 July 2007 P2470 CONSTRUCTION Dimensions Connections 6.0 2.0 Fig. 2 0.6 e2 Fig. 3 8 6.0 2.0 5 1 9.5 12.2 1.35 ETAL P2470 4 1.2 5.6 PCB PATTERN 1 8.2 11.6 1 : 1.375+ 1.375 5 6 4 8 Dimensions shown are in millimetres (inches). Terminal plating JESD97 category = e2 Recommended reflow solder profile: 2 minutes @ 150-200ºC, 10 seconds @ 260ºC; time above 217ºC 60 seconds maximum SAFETY Manufactured from materials conforming flammability requirements of UL 94V-0. ETALDOC 882/2 ABSOLUTE MAXIMUM RATINGS to Page 3 of 4 (Ratings of components independent of circuit). Short term isolation voltage (1s) 1700Vrms Storage temperature -40ºC to +100ºC Operating temperature -40ºC to +85ºC Soldering temperature profile peak 260ºC, 10s July 2007 P2470 COPYRIGHT ETAL and P2470 are Trade Marks of Profec Technologies Ltd. The Trade Mark ETAL is registered at the UK Trade Marks Registry. LTC1535 is trademark of Linear Technology, Inc. MAX3535E and MXL1535E are trademarks of Maxim Integrated Products, Inc Profec Technologies Ltd is the owner of the design right under the Copyright Designs and Patents Act 1988 and no rights or licences are hereby granted or implied to any third party. © 2007 Profec Technologies Ltd. Reproduction prohibited. ETAL Group Oy, Kuormatie 14, FIN-03101, Nummela Telephone: +358 (0)20 7500 330 Fax: +358 (0)20 7500 333 Website: www.etalgroup.com Email: [email protected] ETALDOC 882/2 Page 4 of 4 ISO 9001 FM 25326 July 2007