Telecommunications INDUSTRY Wireless Data Cards Why Choose KEMET Programs Supported KEMET applies world-class service and quality to deliver industry-leading, high performance capacitance solutions worldwide. With 95% of possible dielectric solutions, KEMET offers the world’s most complete line of surface mount and through-hole capacitor technologies across tantalum, ceramic, film, aluminum and paper dielectrics. One world. One KEMET. • Wireless modems for broadband connection with 2G+ networks • Protocol support: GSM/GPRS/EDGE, HSDPA, HSDPA+, HSUPA, TD-SCDMA, WCDMA • Form Factor: USB, PC Card, PCI Express Features & Benefits • Very reliable solution; no aging effect • Fully RoHS-capable • Flexible designs featured by various case sizes Product Checklist • What is the form factor and interface — USB or PC Card? • What is the total capacitance and ESR required? • Are there any physical space restrictions? • Are there any height restrictions (≤ 2 mm, ≤ 1.9 mm)? • What is the expected annual volume? • Is the card OEM- or CEM-built? KEMET Products I/O interfaces such as notebook computer USB and PC Card ports have the following clearly defined power limitations: • USB 2.0: 0.5A @ 5V • PCMCIA: 1A @ 3.3V However, the 578 µs transmission burst within the GSM-TDM protocol requires a peak current between 1.5A and 2A. Select a bulk capacitance of approximately 1000 µF in parallel to the System Power/Power Amplifier. Due to the height limit, especially on the PC Card slot, the capacitance solution must be ≤ 2 mm. The following chart outlines possible design options: Design Option KEMET Series 1 T520 Tantalum with Polymer Cathode (Lowest ESR) 2 3 4* Capacitor Values CR [µF] ESR [mΩ] Size [mm2] KEMET Part Number 7343-20 3 990 8.3 95 T520V337M006ATE025 3528-19 6 900 11.7 60 T520B157M006ATE070 45 3528-19 5 1100 9.0 50 T520B227M006ATE045 400 3528-19 1 100 400 10 T495B107M006ATE400 CR [µF] VR [V] ESR [mΩ] Size 330 6.3 25 150 6.3 70 220 6.3 T495 Standard 100 Tantalum (Low ESR, Surge Robust) 6.3 # of Pieces Solution Values * For TD-CDMA Designs Block Diagram Optional USB Port or PCMCIA SIM Card Micro SD DAC Clock DDC/DUC Processor/Chipset Logic LED Driver PLL/VCO ADC to LEDs Bulk Capacitance For more information, samples and engineering kits, please visit us at www.kemet.com or call 1.877.myKEMET. SA0712 Processor Power System Power Copyright © 2012 KEMET