Document 465 Planar Transformer For National Semiconductor LM5032 PWM Controller • Developed for the NSC LM5032 dual interleaved current mode PWM controller for applications up to 100 Watts. • Can be used in a dual forward converter or in both interleaved power stages of a high-current converter. • Low leakage inductance, excellent DCR • Interwinding isolation: 1500 Vdc. Core material Ferrite Terminations RoHS Matte tin over nickel over brass Weight 10.2 g Ambient temperature –40°C to +85°C Storage temperature Component: –40°C to +85°C. Tape and reel packaging: –40°C to +80°C Resistance to soldering heat Max three 40 second reflows at +260°C, parts cooled to room temperature between cycles Moisture Sensitivity Level (MSL) 1 (unlimited floor life at <30°C / 85% relative humidity) Failures in Time (FIT) / Mean Time Between Failures (MTBF) 38 per billion hours / 26,315,789 hours, calculated per Telcordia SR-332 Packaging 200 per 13″ reel Plastic tape: 44 mm wide, 0.37 mm thick, 32 mm pocket spacing, 9.35 mm pocket depth PCB washing Only pure water or alcohol recommended Output Output Primary Leakage Pri/sec Part Output voltage current inductance2 inductance3 DCR max Turns ratio Isolation number1 power (W) nom (V) (A rms) min (µH) max (µH) (mOhms) pri : sec(Vdc) C1539-AL_ 100 12 8.33 320.0 0.25 pri:63.0 2 : 11500 sec: 15.0 1. When ordering, please specify a packaging code: C1539-ALD Packaging:D =13″ machine ready reel. EIA-481 embossed plastic tape (200 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 2 and 4 at 250 kHz, 0.1 Vrms, 0 Adc. 3. Leakage inductance measured between pins 2 and 4 at 100 kHz, 0.1 Vrms, 0 Adc with pins7 and 9 shorted. 4. Storage and ambient operating temperature range: –40°C to +85°C. 5. Electrical specifications at 25°C. Dot indicates pin 1 4 5 C1539-AL 20,57 XXXXY 1 2 0.810 max 3 0.920 max 23,37 7 2 10 9 8 7 6 Primary 0.820 20,83 2 9 4 7 4 Secondary 9 0.190 4,83 0.080 Ø 2,03 Recommended Land Pattern Parts manufactured prior to December 2011 may be marked differently. 0.360 max 9,14 0.006 /0,15 Dimensions are in inches mm Document 465 Revised 12/21/11