FIGURE 1: SCHEMATIC DIAGRAM TABLE 1: ELECTRICAL SPECIFICATIONS AT 25 OC A) 1:1 GATE DRIVE TRANSFORMER. DESIGNED FOR USE WITH 2-TRANSISTOR SINGLE ENDED FOWARD CONVERTER CONTROL I.C.'S SUCH AS MICRO LINEAR'S ML4824 AND UNITRODE'S 3845. B) PART IS REVERSIBLE. IT CAN BE INSERTED INTO PCB EITHER WAY. PARAMETER SPEC LIMITS MIN. TYP. MAX. UNITS TURNS RATIO'S: PRI : SEC -------- 1:1 -------- + 3% PRIMARY INDUCTANCE: (1to 3) VOLTAGE = 0.200Vrms @ 100KHz 500 800 -------- µHy PRIMARY LEAKAGE IND: (1 to 3) VOLTAGE = 0.200Vrms @ 100KHz -------- 1.35 2.0 µHy 150 50 .11 .15 KHz % Tesla Tesla BIPOLAR DESIGN POINT: 12V Primary OPERATING FREQUENCY MAXIMUM DUTY CYCLE: BIPOLAR MAXIMUM FLUX DENSITY: BIPOLAR MAXIMUM FLUX DENSITY: UNIPOLAR ET PRODUCT WITH <10% DROOP: (1) (PRIMARY VOLTS x PULSE WIDTH) BIPOLAR PULSE @ Bmax_Bipolar UNIPOLAR PULSE @ Bmax = Unipolar ----------------------------- 100 ---------------------- --------------- 60 40 80 50 HI-POT: BETWEEN ANY TWO WINDINGS 1500 -------- -------- WHITE DOT DENOTES PIN #1 1 6 PRIMARY SECONDARY 4 3 V-µsec V-µsec Vdc (1) Higher ET's are possible at lower operating frequencies and/or if increased pulse droop can be tolerated. High frequency designs are generally core loss limited. FIGURE 2: PHYSICAL DIMENSIONS IN INCHES, (mm) 4 5 FIGURE 3: TYPICAL APPLICATION CIRCUIT +382VDC HOT RAIL >> 6 Q2 R17 2 1 .380 (9.65) R30 D5 6 1 CORES TAPED .360 (9.14) .098 (2.49) VO2 1 3 R15 PWM DRIVER (ML4824) .197 (5.00) D7 4 3 .118 (3.00) .024 SQ. 2 T1 PMGD-03 .300 (7.62) P PMGD-03 M XXXX 3 S PRIMARY 3 G C25 PIN #1 WHITE DOT C20 11 R14 1 Q3 D G S 4 5 D6 >> D10 .197 (5.00) D 6 REV. 10/08/95 DESCRIPTION OF CHANGES INITIAL RELEASE AS STANDARD PART# (WAS TSD-736) EP7 P Premier M Magnetics Inc. "INNOVATORS IN MAGNETICS TECHNOLOGY" UNLESS OTHERWISE SPECIFIED DIMENSIONS ARE IN INCHES DIMENSIONAL TOLERANCES ARE: DECIMALS ANGLES .XX + .04 + 0 O 30' .XXX + .020 DO NOT SCALE DRAWING GATE DRIVE TRANSFORMER PREMIER P/N: PMGD-03 DRAWN BY: TOM O'NEIL SCALE: NONE CONTROL DRAWING REVISION: 10/08/95 REF: ML4824-1 SHEET: 1 OF 2