TSD-748

P Premier M Magnetics Inc. "INNOVATORS IN MAGNETICS TECHNOLOGY" SUPPORT PRODUCTS FOR MICRO LINEAR I.C.'S — Magnetics For Micro Linear's Ballast IC's – Magnetics Micro Linear's ML4824 Switcher GENERAL APPLICATION ML4824-1 Premier Magnetics' TSD-735 Switch Mode Transformer was designed for use with MICRO LINEAR'S ML4824-1 PFC/PWM Combination off-line controller IC, in the Two Transistor Single-Ended Forward Converter Configuration. This converter topology can provide isolated multiple outputs with efficiencies up to 90%. Premiers' TSD-735 transformer has been optimized to provide maximum power throughput and to provide the necessary bias voltage for the ML4824-1 and it's auxiliary circuitry. The ML4824-1 from Micro Linear is highly integrated power supply controller, incorporating a PFC front end operating at 100KHz, and a synchronized PWM switching regulator running @ 50KHz. This combination provides all necessary functions for a Universal-Input, Power Factor Corrected DC power supply in the 50 to 500W output range. The TSD734 boost inductor and TSD-735 output transformer are critical to the performance of the circuit. Together they define the harmonic reduction, efficiency, output power and the size of the Power Factor Correction and DC output stages. Below is a typical universal input, high precision application circuit utilizing Micro Linear's ML4824-1 PFC/PWM control IC. The AC mains voltage is power factor corrected and boosted to 382VDC by the PFC half of the ML4824-1 and the TSD-734 PFC boost inductor. The PWM half of the ML4824-1 and the PMGD-03 gate drive transformer then provide the MOSFET gate drives for operating the TSD-735 output transformer which converts the 382VDC hot rail to a regulated 12VDC, 100W output. Recommended component values can be obtained from Micro-Linear's ML48241 application notes. Evaluation boards are available from Micro Linear. D2 100WATT PFC UNIVERSAL OFF-LINE SWITCHING MAGNETICS SCHEMATIC +382VDC HOT RAIL Q2 C4 R17 R7A C25 R30 D5 6 D7 L2 VTP-05007 + G S D LINE >> F1 ~ + L1 TSD-734 3 Q1 6 D D1 90-260Vac 50/60Hz NEUT >> C1 BR1 R2A R1A R2B C3 R3 C2 R4 R1B R27 R21 G S D9 C5 ~ - R7B T1 PMGD-03 (TSD-736) 1 3 4 T2 TSD-735 3 PRIMARY 11 & 12 SECONDARY D11A >> C24 + D11B +12V C30 R15 C20 R14 BIAS + C7 R12 C7 16 15 14 13 12 11 10 9 Vout R18 1 Q3 G S D6 D C21 12V RETURN 7 &8 >> D3 C12 + 6 R19 R20A R20B 5 C17 R28 R9 R13 Q4 R16 R24 + R23 C22 R6 D4 + C U2 1 2 3 4 5 6 7 8 ML4824 IEAO IAC ISENSE VRMS SS VDC RAMP1 RAMP2 VEAO FB REF VCC V01 V02 GND DCILIM A C10 C E R22 R11 C15 R8 R10 C16 C13 C14 R26 U3 C23 C8 C9 C R A R25 R5A R5B R5C R5D C19 D8 C18 C11 D10 Specifications subject to change without notice. mlsuport 09/98 20381 BARENTS SEA CIRCLE, LAKE FOREST, CA 92630 • TEL: (949) 452-0511 • FAX: (949) 452-0512 • http://www.premiermag.com 1 P Premier M Magnetics Inc. "INNOVATORS IN MAGNETICS TECHNOLOGY" SUPPORT PRODUCTS FOR MICRO LINEAR I.C.'S GENERAL ELECTRICAL SPECIFICATIONS AT 25OC - OPERATING TEMPERTURE RANGE 0OC TO +70OC The following magnetics have been designed for use with a variety of Micro Linear semiconductors. To receive complete specifications & application information, please contact the factory or fill out our Literature Request form to recieve the respective part number detail data sheet. PART NUMBER TSD-734 TSD-735 TSD-1047 TSD-1048 PMGD-03 TSD-845 TSD-835 TSD-939 TSD-938 TSD-746 TSD-917 PMGD-04 TSD-748 TSD-749 TSD-789 TSD-780 TSD-843 TSD-800 TSD-801 TSD-918 TSD-802 TSD-919 TSD-831 TSD-844 TSD-902 TSD-903 TSD-882 TSD-965 TSD-1086 TSD-1082 TSD-1087 TSD-892 TSD-1085 TSD-756 TSD-904 Micro Linear I.C. Part Number Package APPLICATION INFORMATION ML4824 ML4824 ML4824 ML4824 ML4824 ML4826 ML4826 ML4826 ML4826 ML4831 ML4831 ML4831 ML4831 ML4831 ML4821 ML4831 ML4831 ML4831 ML4831 ML4831 ML4831 ML4831 ML4831 ML4831 ML4831 ML4831 ML4832 ML4833 ML4833 ML4833 ML4833 ML4833 ML4833 ML4863 ML4900 PFC Boost Inductor, ML4824-1 EVAL, 100W @ 50KHz Main Switching Transformer, ML4824-1 EVAL, 100W @ 100KHz PFC Boost Inductor, ML4824-2 EVAL, 100W @ 100KHz Main Switching Transformer, ML4824-2 EVAL, 100W @ 200KHz Gate Drive Transformer (formerly TSD-736), ML4824-1 EVAL PFC Boost Inductor, ML4826 @ 500W Main Switching Transformer, ML4826, 500W Multiple Outputs PFC Boost Inductor, ML4826 @ 650W Main Switching Transformer, ML4826, 650W Multiple Outputs Boost Inductor, T1 on ML4831 220V EVAL Board Boost Inductor, T1 HORZ version on ML4831 220V EVAL Board Gate Drive, T2 on ML4831 220V EVAL Board (formerly TSD-747) Main Switching Transformer, T4 on ML4831 220V EVAL Board Current Sense Transformer, T5 on ML4831 220V EVAL Board T1 on ML4821-EVAL, PFC Controller Main Switching Transformer, T4 on ML4831 277V EVAL Board Main Switching Transformer, T4 HORZ version ML4831 277V EVAL Main Switching Transformer, T3 on ML4831 220V Low Cost EVAL Power Transformer, T3 Variation on ML4831 220V EVAL Board Power Transformer, T3 HORZ version Variation on ML4831 220V Main Transformer, T4 Variation on ML4831 220V EVAL Main Transformer, T4 HORZ version Variation on ML4831 220V Boost Inductor, T1 on ML4831 120V EVAL Board Boost Inductor, T1 HORZ version ML4831 120V EVAL 100KHz ZVS PFC Boost Inductor 100KHz ZVS PFC Resonant Inductor Boost Inductor, T1 on ML4832 220V EVAL Board Boost Boost Boost Boost Boost Boost Inductor, T1 on ML4833 220V Dimming EVAL Board Inductor, T1 HORZ version, ML4833 220V Dimming EVAL Inductor, T1 on ML4833 120V Dimming EVAL Board Inductor, T1 HORZ version, ML4833 120V Dimming EVAL Inductor, T4 on ML4833 220V Dimming EVAL Board Inductor, T4 HORZ version, ML4833 220V Dimming EVAL E375 EE30 E375 EI33/29 EP7 E55/21 ETD-49 E55/21 E55/21 EF25-VERT EF25-HORZ EP10 EF25-VERT EF25-VERT PQ40 EF25-VERT EF25-HORZ EF25-VERT EF25-VERT EF25-HORZ EF25-VERT EF25-HORZ EF25-VERT EF25-HORZ E42/20 E2425 EF25-VERT EF25-VERT EF25-HORZ EF25-VERT EF25-HORZ EF25-VERT EF25-HORZ EF25-VERT Toroid mlsuport 09/98 Flyback Transformer, Vin = 3.3V, Vout= 3.3V, 5.0V & 12V 15A Powdered Iron inductor, 1.4uHy Specifications subject to change without notice. 20381 BARENTS SEA CIRCLE, LAKE FOREST, CA 92630 • TEL: (949) 452-0511 • FAX: (949) 452-0512 • http://www.premiermag.com 2