Document 328-1 Planar Magnetics For National Semiconductor LM5041 IC This planar transformer and inductor pair were designed specifically for National Semiconductor’s LM5041 IC. The A9786-A transformer is engineered for use in highcurrent telecom power supply applications that require high efficiency in a low-profile package.The auxiliary winding can be used to control input current to PWMs. It offers very high current handling capability and extremely low DC resistance in a low profile package. Coilcraft’s A9787-A inductor is designed as the output choke for the LM5041. Planar magnetics offer high power densities along with great reliability and repeatability. Windings are etched into a printed circuit board, ensuring high efficiency and consistency. Request free evaluation samples by contacting Coilcraft or visiting www.coilcraft.com. Transformer Input OutputPrimary Leakage Pri/sec DCR maxisolation Part Output voltage Output current inductance1 inductance2 (mOhms)(Vdc) number1 power (W) range (V) voltage (V) (A rms) min (mH) max (µH) A9786-AL_ 150 36 – 75 2.5 60.0 1.25 0.90 Primary: 62.5 (1 – 3) 1100 Secondary: 0.91 (5,6 – 9,10) 200 (4 – 11) 1. When ordering, please specify packaging code: A9786-ALD Packaging:D =13″ machine-ready reel. EIA-481 embossed plastic tape (125 parts per full reel). B=Less than full reel. In tape, but not machine ready. To have a leader and trailer added ($25 charge), use code letter D instead. 2.Inductance measured on an Agilent/HP 4284 between pins 1 and 3 at 250 kHz, 0.1 Vrms, 0 Adc. 3. Leakage inductance measured between pins 1 and 3 at 100 kHz, 0.1 Vrms, 0 Adc with all secondary pins shorted. 4. Operating temperature range: –40°C to +85°C. 5. Electrical specifications at 25°C. Refer to Doc 362 “Soldering Surface Mount Components” before soldering. 5,6 0.45 max 11,43 0.004 /0,10 5 4 1.23 max 2 31,24 1 1 0.285 7,24 Pri 0.075 1,91 7,8 2 3 10 11 0.31 7,87 2 5 Recommended Land Pattern Sec 1T 9,10 8T 3 11 10 8T 1.32 33,53 1.21 30,73 1.15 29,21 1.48 max 37,59 3 1T 1 4 Aux 4T 11 4 0.12 3,05 0.175 4,45 US +1-847-639-6400 [email protected] UK +44-1236-730595 [email protected] Taiwan +886-2-2264 3646 [email protected] China +86-21-6218 8074 [email protected] Singapore + 65-6484 8412 [email protected] Weight: 33.4 g Terminations: Matte tin over nickel over brass Tape and reel: 125/13″ reel 56 mm tape Document 328-1 Revised 06/09/08 © Coilcraft Inc. 2013 This product may not be used in medical or high risk applications without prior Coilcraft approval. Specification subject to change without notice. Please check web site for latest information. Document 328-2 Planar Magnetics for National Semiconductor LM5041 Output Inductor Inductance2 Part @ 0 Adc number1 (µH) A9787-AL_ 57 ±7% Inductance2 @ 7.5 Adc min (µH) 47.0 DCR max (mOhms) 17.0 1. When ordering, please specify packaging code: A9787-ALD Packaging:D =13″ machine-ready reel. EIA-481 embossed plastic tape (125 parts per full reel). B=Less than full reel. In tape, but not machine ready. To have a leader and trailer added ($25 charge), use code letter D instead. Typical L vs Frequency Isat4 (A) 8.1 Irms5 (A) 12.0 Typical L vs Current 1000 Inductance (µH) Inductance (µH) (Vdc) 1100 2. Inductance measured on an Agilent/HP 4284 at 250 kHz, 0.1 Vrms. 3. Isolation measured from pins 1,2 to the core. 4. DC current at which inductance drops 10% (typ) from its value without current. 5. Current that causes a 40°C rise from 25°C ambient. 6. Operating temperature range: –40°C to +85°C. 7. Electrical specifications at 25°C. Refer to Doc 362 “Soldering Surface Mount Components” before soldering. 1000 100 10 1 Isolation3 1 0.1 10 100 Frequency (MHz) 1000 100 10 1 10000 0.1 1 Current (A) 10 100 1,2 0.45 max 11,43 0.004 /0,10 3,4 For mounting stability only 1.30 max 37,59 1.145 29,08 0.12 3,05 1 4 1.23 max 31,24 1 For mounting stability only 0.34 8,64 0.30 7,62 4 0.075 1,91 Recommended Land Pattern Weight: 31.0 g Terminations: Matte tin over nickel over brass Tape and reel:125/13″ reel 56 mm tape US +1-847-639-6400 [email protected] UK +44-1236-730595 [email protected] Taiwan +886-2-2264 3646 [email protected] China +86-21-6218 8074 [email protected] Singapore + 65-6484 8412 [email protected] Document 328-2 Revised 06/09/08 © Coilcraft Inc. 2013 This product may not be used in medical or high risk applications without prior Coilcraft approval. Specification subject to change without notice. Please check web site for latest information.