Document 426 Planar Transformer For Maxim MAX5069A PWM Controller The B0860-C is approved by Maxim for use with their MAX5069A high-frequency, current-mode, pulse-width modulation (PWM) controller. This planar transformer can be used in push-pull, halfbridge and full-bridge topologies. It is ideal for use in high-current, isolated or nonisolated power supply applications. It offers high efficiency in a low-profile package and features split primary and secondary windings, a separate auxiliary winding and 1500 Vdc primary to secondary isolation. Coilcraft’s Planar Prototyping Kit C356 was used to design this transformer. No tooling or additional parts were required. To order the kit, contact Coilcraft or purchase on-line at http://order.coilcraft.com. Free evaluation samples of B0860-C are available by contacting Coilcraft or by visiting www.coilcraft.com. Part Output number1 power (W) B0860-CL_ 180 Input voltage range (V) 36 – 72 Output voltage nom (V) 12 Output current (A peak) 15 Primary inductance2 min (µH) 187.0 1. When ordering, specify a packaging code: B0860-CLD Packaging: D = 13″ machine ready reel. EIA-481 embossed plastic tape (200per 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. Dot indicates pin 1 10 1 0.095 2,41 DCR max (mOhms) Pri: 38.0 Sec: 4.0 Aux: 120.0 Turns ratio4 pri : sec pri : aux 10 : 4 10 : 3 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 250 kHz, 0.1 Vrms, 0 Adc with pins 6, 8 and 10 shorted. 4. Turns ratio is with the primary windings and secondary windings connected in series. 5. Storage and ambient operating temperature range: –40°C to +85°C. 6. Electrical specifications at 25°C. 0.800 20,32 2 6 3 8 Sec 4 10 10 1 0.250 6,35 2 0.810 max 3 20,57 Leakage inductance3 max (µH) 0.25 Pri 8 4 5 5 6 0.080 Ø 2,03 6 Recommended Land Pattern 0.920 max 23,37 0.110 Ø 2,79 1 Aux 5 0.360 max 9,14 0.006 /0,15 Weight: 11.8 g Terminations: Matte tin over nickel over brass Tape and reel: 200/13″ reel 44 mm tape width Specifications subject to change without notice. Please check our website for latest information. © Coilcraft, Inc. 2007 Document 426 Revised 05/10/07