8-PIN SMD PUSH-PULL TRANSFORMERS * Designed to Support Maxim's MAX253 * 1500Vrms Minimum Isolation Voltage * Designed For >125KHz, 50% Duty Cycle Push-Pull Operation @ 1.0 Watt Output * Low profile 8-Pin SMD Package * Industry Standard Package * Multiple Configurations ELECTRICAL SPECIFICATIONS AT 25OC - OPERATING TEMPERATURE RANGE -40OC TO +85OC PART NUMBER PM-SM15 PM-SM16 PM-SM17 PM-SM18 TURNS RATIO (Pri:Sec ± 5%) 1CT 1CT 1CT 1CT : : : : PRIMARY OCL (µH Min.) 1.00 1.38CT 2.00CT 0.667 150 150 150 150 Primary Pins 1-4 1-4 1-4 1-4 PRI/SEC HI-POT (Vrms) GENERAL CHARACTERISTICS TYPICAL APPLICATION +5V to +10V +5V to +5V +3.3V to +5V +5V to +5V 1500 1500 1500 1500 Volt Doubler Driving a Regulator Full Wave Center Tap Full Wave Center Tap Full Wave Bridge MECHANICALS TYPICAL APPLICATIONS +5V RECOMMENDED P.C.B. LAYOUT Dimensions in mm (inches) 6 0.33uF 5 D2 8 7 3x2.0 (.079) 4 8 8x1.0 (.040) REGULATED OUTPUT 5V @ 200mA 78L05 0.33uF 3 MAXIM MAX253 MBR0520L 8 1 2 Vcc D1 10.1 (.398) 1 PM-SM15 1CT : 1 6 1 8x1.0 (.040) 0.1uF VOLTAGE DOUBLER ISO GND MBR0520L 4 +5V 5 0.1uF FULL WAVE CENTER TAP PM-SM16 1CT : 1.38CT 6 6 5 8 7 5 2.0 (.079) TYP D2 10.7 (.421) MAX MBR0520L 8 4 6 0.70 (.028) 4 3 7 3 6.00 (.236) 2 8 P PM-SMXX M YYWW 1 MAXIM MAX253 2 PIN#1 I.D. DOT 1 1 Vcc D1 0.33uF MBR0520L +3.3V 0.1uF PM-SM17 1CT : 2.0CT 6 7 6 5 0.33uF MBR0520L +5V 0.1uF PM-SM18 1CT : 0.667 6 1 8 7 3 6 4 5 Specifications subject to change without notice. 8 2 D2 1 MAXIM MAX253 11.6 (.457) 12.0 (.472) ISO GND FULL WAVE BRIDGE Vcc D1 10.1 (.398) UNREGULATED OUTPUT 5V @ 100mA 8 4 8 3 D2 MBR0520L 2 6.30 (.248) MAX 1 1 MAXIM MAX253 8.10 (.319) ISO GND FULL WAVE CENTER TAP Vcc D1 CORE CLAMP UNREGULATED OUTPUT 5V @ 200mA UNREGULATED OUTPUT 5V @ 200mA 0.33uF ISO GND 20381 BARENTS SEA CIRCLE, LAKE FOREST, CA 92630 • TEL: (949) 452-0511 • FAX: (949) 452-0512 • http://www.premiermag.com 1