SMT POWER INDUCTORS Power Beads - PA314xAHL Series Coupled Inductor 8mm Coupled Inductors for Volterra Gen2.5 Applications For use only with Volterra chipsets Coupled Inductors enable: Phase ripple current reduction due to AC magnetic field cancellation within the inductor core. Improved efficiency due to lower peak currents Reduction in required output capacitance Electrical Specifications 25C - Operating Temperature -40C to +130C 4,5 Open Circuit Inductance per Phase (nH) 3 Series Equivalent Imax Peak Number of Irms TDC Part Number Inductance Transient per Phase 6 Phase 1 Phase 2 Phase 3 Phase 4 Phase 5 DCR per Phase Coupled Phases (Adc) (nH +/- 15%) (nH) (Adc) (2-1) (4-3) (6-5) (8-7) (10-9) (m) 200nH Min at 0Adc (25C) PA3142AHL 2 100 150nH Min at 25Adc (25C) na na na 100nH Min at 23Adc (105C) 200nH Min at 0Adc (25C) PA3143AHL 3 150 150nH Min at 25Adc (25C) na na 100nH Min at 23Adc (105C) 0.25 Typical 50 40 110 0.30 Max 200nH Min at 0Adc (25C) PA3144AHL 4 200 150nH Min at 25Adc (25C) na 100nH Min at 23Adc (105C) 200nH Min at 0Adc (25C) PA3145AHL 5 250 150nH Min at 25Adc (25C) 100nH Min at 23Adc (105C) Notes: 1. The series inductance is the inductance when all phases are tied in series and is measured and verified in 4. The open-circuit inductance per phase is the measured inductance across each phase when all other phases production at 100khz, 100mVrms: are open circuit. Open circuit inductance is measured at 100kHz, 100mVrms. The open circuit inductance is equal (ie: for PA3144AHL: Inductance (2-7) with (1-4 and 3-6 and 5-8 shorted) ) to the magnetizing inductance per phase (Lm) plus the equivalent transient inductance (Lk). The open circuit inductance values at 25C (0Adc and 26 Adc) are measured and verified during production. 2. In a non-coupled multi-phase topology, the power supply sees the same inductance during transient and steady-state conditions. As a result, any attempt to lower the inductance to improve transient response has the 5. All elevated temperature measurements were verified during design but are not measured during production negative result of increasing ripple and peak currents throughout the system during steady-state operation. and therefore are for reference only. However, in a coupled inductor multi-phase topology, the interaction of magnetic fields from each phase enables an overall reduction in ripple current during steady-state operation and a lower equivalent inductance 6. DCR is measured between points a and b as shown on the mechanical drawing. during transient operation. The equivalent transient inductance per phase, as listed, represents the actual value of inductance (Lk) that would be required in an non-coupled topology to realize the same transient perfor- 7. Optional tape and reel packaging can be ordered by adding a T suffix to the part number (ie: PA3144AHL mance. The equivalent inductance per phase can be calculated as series inductance divided by the number of becomes PA3144AHLT). Pulse complies to the industry standard tape and reel specification EIA481. The tape phases. For more information on the operation of the coupled inductor topology, please contact Volterra. and reel for this product has the following dimensions: PA3142AHL: W=32.0, Po =16.0, Ko = 8.0 3. The rated current (I ) is the continuous current which results in a 55 C rise of the component temperature PA3143AHL: W=44.0, Po = 16.0, Ko =7.6 rms TDC above the ambient temperature (Conditions: Ta=55 C 200LFM airflow Tested on a Volterra evaluation board). PA3144AHL: W=56.0, Po=16.0, Ko=7.6 The peak current (Imax) is the current which causes a 20% reduction of the leakage inductance compared to no PA3145AHL: W=72, Po=16.0, Ko=8.0 load conditions at 105 C. 1 pulseelectronics.com P715.D (9/13)SMT POWER INDUCTORS Power Beads - PA314xAHL Series Coupled Inductor Mechanicals PA3142AHL * All Dimensions in mm. Unless stated otherwise the tolerance on the listed PULSE PA3142AHL dimensions are: .X 0.2 .XX 0.10 Schematic PRIMARY SUGGESTED LAND PATTERN Mechanicals PA3143AHL * All Dimensions in mm. Unless stated otherwise the tolerance on the listed dimensions are: .X 0.2 Schematic .XX 0.10 PRIMARY SUGGESTED LAND PATTERN FINAL OUTLINE 2 pulseelectronics.com P715.D (9/13)