DC/DC POWER CONVERSION TRANSFORMERS * Designed for use with Leading Controller Chips * Provides DC/DC Conversion & Isolation * Design Engineenring Support Available. * Multiple Configurations. GENERAL APPLICATION INFORMATION Premier Magnetics' Switch Mode Output transformers have been designed for use with the most popular currentmode switching regulators such as Linear Technologies LT1X7X & National Semiconductors LM25XX series of High Efficiency Switching Regulators. These output transformers have been optimized to provide maximum power throughput in the smallest packages currently available. This combination of components finds wide use in Distributed Power Systems where a main dc voltage bus is converted for use on or near the circuits being served. These types of switching regulators provide a very simple solution to power conversion designs. The inductor or transformer used are critical to the overall performance of the converter and typically define the overall efficiency, output power and physical size. The following tables of transformers were designed for use in the Flyback Buck-Boost circuit configuration. This conversion topology allows the output voltage to be regulated higher or lower than the input voltage. It can also provide isolated or non-isolated multiple outputs. Typical efficiency of this topology is 75%. Below is a typical application circuit utilizing Linear Technologies LT1X7X switching regulator in the flyback buckboost configuration. The use of Premiers VTP-01XXX or VTK-01XXX optional output filter choke will drastically reduce output ripple and noise. The component values listed are intended for reference purposes only. The Output Filter(s), Damper Network & Foldback Current Limiting Network are optional depending on the specific application. General Component Values: SCHEMATIC R3 = 1.0K 1/8W D1 = MBRXXX, Schottky Rectifier C3 = 2.2uF Film D2 = MBRXXX, Schottky Rectifier R4 = 1.5K 1W Snubber D3 = MBRXXX, Schottky Rectifier C4 = .47uF Film C1 = Electrolytic R5 = 2.0K 1W C7 = Electrolytic C5 = 0.1uF Ceramic R6 = 1% Metal Film as needed. L1 = 10uHy @ Rated DC amps (VTP-XXXX) C6 = 1000uF Electrolytic L2 = 10uHy @ Rated DC amps (VTP-XXXX) C8 = 1000uF Electrolytic Np:Ns2 R1 = 1% Metal Film, For 5Vdc = 3.0K, For 9Vdc = 9.09K R1 = [Vout-Vref/Vref] * R2, where Vref = 1.244 for LT1X7X series R2 = 1% Metal Film, For 5Vdc = 1.0K, For 9Vdc = 1.5K C2 = Input Bypass Capacitor 100uF Electrolytic OUTPUT FILTER D3 +Vout2 L2 + C7 + C8 Isolated Output -Vout2 FLYBACK Buck-Boost CONVERTER USING LT1X7X RC Snubber Damper +Vin D1 +Vout1 T1 R4 D2 C6 + R1 Vsw Np:Ns1 FB R6 Vc R3 C3 Foldback Current Limiting * * E1 E2 GND + C5 Frequency Compensation + C1 1N914 Vin Linear Technology LT-1X70 = 5A LT-1X71 = 2.5A LT-1X72 = 1.25A LT-107X = 40KHz LT-117X = 100KHz L1 C4 R5 C2 OUTPUT FILTER R2 Specifications subject to change without notice. pmsm 6/97 20381 BARENTS SEA CIRCLE, LAKE FOREST, CA 92630 TEL: (949) 452-0511 FAX: (949) 452-0512 http://www.premiermag.com 1 DC/DC POWER CONVERSION TRANSFORMERS GENERAL ELECTRICAL SPECIFICATIONS AT 25OC - OPERATING TEMPERATURE RANGE 0OC TO +70OC To receive complete specifications & application information, request the respective part number data sheet. PART NUMBER Designed For Use With APPLICATION PRIMARY HI-POT Vin Vout Io_max OCL HY Vdc (Vdc) (Vdc) (mA) Typ. Min. PM-SM02 PM-SM03 PM-SM04 PM-SM05 PM-SM07 PM-SM09 LT1071 LT1071 LT1071 LT1071 LT1070 LT1070 12.0 12.0 24.0 24.0 12.0 12.0 TSD-546 Output #2 LT1072 12.0 ------ TSD-578 LT1072 Output #2 Output #3 = Tap off #2 TSD-648 LT1171 Outputs #2 & #3: +15.0 PCB Mount Method 1000 1000 2000 2000 2000 4000 140 110 200 200 50 135 550 550 550 550 550 250 20 35 40 40 40 50 Feed Back Output THRU Feed Back Output THRU Feed Back Output THRU Feed Back Output THRU Feed Back Output THRU Feed Back Output THRU 5.0 9.0 220 160 250 ----- 550 550 15 ----- Feed Back Output Isolated Output THRU 24.0 ----------- 5.0 5.0 6.0 100 200 32 1000 --------- 500 500 ----- 15 --------- Isolated Output #1 Isolated Output #2 Tap Output off #2 THRU 5.0 ------ 5.0 +15.0 60 +100 48 ----- 750 750 15 ----- Isolated Output, Opto F.B. Isolated + Linear Reg. SMD 18-50 15.0 700 80 N/A 15 Positive Buck SMD TSD-652 MAX783 Output #2 = Auxiliary 5.5-30 ------ 3.3 15.0 3100 220 10 ----- 500 500 10 ----- Positive Buck Auxiliary Output SMD TSD-723 12.0 15.0 2000 210 550 30 Isolated Output THRU TSD-725 LT1172 13V TAP Output -----15V TAP Output ------ 12.0 13.0 15.0 5.0 150 60 500 --------- 100 --------- 550 --------- 15 Feed Back Output Tap Output Tap Output SMD TSD-726 LT1172 Output #2, 13V TAP Output #3, 15V TAP 12.0 ----------- 5.0 13.0 15.0 100 40 200 100 --------- 100 --------- 15 --------- Feed Back Output Tap Output Tap Output SMD 9-33 5.0 200 1000 1000 10 Isolated Output THRU TSD-730 LT1172 18-30 Output #2 & #3: +15V -----(TSD-933 = THRU VERSION) 5.0 +15.0 250 +25 1000 ----- 500 500 10 ----- Isolated Output Isolated Output SMD TSD-649 TSD-727 LT1076HV LT1070 LT1172 5.0 9.0 5.0 5.0 5.0 5.0 Temp Rise oC General Notes Typ. DISCRETE SELF OSCILLATING PUSH-PULL CONVERTERS, DUAL SECONDARIES TSD-643 40KHz Full Wave C.T. Full Brige Dual Full Brige 12.0 ----------- 24 48 + 24 420 210 + 210 2300 3750 3750 3750 25 Isolated Output Isolated Output Isolated Output THRU TSD-644 40KHz Full Wave C.T. Full Brige Dual Full Brige 12.0 ----------- 100 200 +100 50 25 + 25 2300 3750 3750 3750 25 Isolated Output Isolated Output Isolated Output THRU TSD-645 40KHz Full Wave C.T. Full Brige Dual Full Brige 52.0 ----------- 100 200 +100 100 50 + 50 6800 3750 3750 3750 25 Isolated Output Isolated Output Isolated Output THRU TSD-742 1.0KHz DC to AC 1.5-3.5 85rms 8 rms 31mH 500 10 Isolated rms Output SMD Specifications subject to change without notice. pmsm 6/97 20381 BARENTS SEA CIRCLE, LAKE FOREST, CA 92630 TEL: (949) 452-0511 FAX: (949) 452-0512 http://www.premiermag.com 2 DC/DC POWER CONVERSION TRANSFORMERS GENERAL ELECTRICAL SPECIFICATIONS AT 25OC - OPERATING TEMPERATURE RANGE 0OC TO +70OC To receive complete specifications & application information, request the respective part number data sheet. PART NUMBER TSD-750 Output #2 Designed For Use With APPLICATION PRIMARY HI-POT Vin Vout Io_max OCL HY Vdc (Vdc) (Vdc) (mA) Typ. Min. Temp Rise oC Typ. General Notes PCB Mount Method LT1172 10-30 ------ 24.0 24.0 50 50 610 ----- 500 500 10 ----- Isolated Output Isolated Output SMD TSD-769 LT1071 Output #2 Output #3 = Auxiliary 9-32 ----------- 32.0 20.0 8.0 100 100 20 410 --------- 500 500 500 25 --------- Isolated Output Isolated Output Isolated Output THRU TSD-826 LT1171 Output #2 Outputs #3 & #4: +48V 7-16 ----------- 5.0 -5.0 + 48.0 500 20 +50 55 --------- 500 500 500 25 --------- Feed back Output Second Output Isolated Outputs +48V SMD +1000 -10 324 ----- 1500 ------ 15 ----- Isolated Output, Opto F.B. Isolated Output THRU TSD-834 Output #2 UC2843 130-260 +5.0 ------5.0 TSD-839 LT1171 Output #2 & #3: +20Vdc Output #4 & #5: +30Vdc 12.0 ----------- +9.0 +20.0 +30.0 +250 +80 +10 150 --------- 300 ----------- 15 --------- Isolated Output, Opto F.B. Isolated Output Isolated Output SMD TSD-841 Output #2 5-30V ------ -180.0 +60.0 -50 +50 45 ----- 500 ------ 20 ----- Isolated Output, Opto F.B. Isolated Output THRU TSD-849 UC2843 3.3V TAP Output Output #2 100-280 +5.0 -----+3.3 ------5.5 +450 +200 -100 292 --------- 1500 ----------- 15 --------- Isolated Output, Opto F.B. Tap Output Isolated Output SMD TSD-850 UC2843 Output #2 -24V TAP Output off #2 100-280 -48.0 ------65.0 ------24.0 -40 -75 -150 200 --------- 1500 ----------- 15 --------- Isolated Output, Opto F.B. Isolated Output Tap Output SMD TSD-851 UC2843 -28V TAP Output 120-260 -48.0 ------28.0 -20 -200 324 ----- 1500 ----- 15 ----- Isolated Output, Opto F.B. Tap Output THRU TSD-852 Output #2 UC2843 130-260 +12.0 ------160.0 +100 -200 324 ----- 1500 ------ 15 ----- Isolated Output, Opto F.B. Isolated Output THRU TSD-878 Output #2 LT1170 24.0 ------ 5.0 12.0 1250 1250 68 ----- 1500 ------ 30 ----- Isolated Output, Opto F.B. Isolated Output THRU TSD-879 LT1170 24.0 +12.0 +250 150 1500 15 Isolated Output, Opto F.B. SMD TSD-887 LT1170 15-21 175.0 120 63.0 1000 20 Direct Feedback THRU TSD-906 Output #2 LM2588T 24.0 WITH REG'S ------ 5.0 15.0 2500 1000 160 ----- 1000 ------ 15 ----- Isolated Output, Opto F.B. Iso. Linear Reg Output THRU TSD-913 LT1171 10-30 5.0 1200 100.0 1500 10 Isolated Output, Opto F.B. THRU TSD-933 LT1172 Output #2 & #3 ------ 18-30 +15.0 5.0 +25 250 ----- 1000 500 500 ----- 10 Isolated Output Isolated Output THRU TSD-980 Output #2 LT1082 12-40 ------ 12.0 12.0 125 125 1300 ----- 1500 1500 10 ----- THRU TSD-989 LT1172 Output #2 & #3 ------ 8-40 +10.0 5.0 +50 200 ----- 100 500 --------- 10 Direct Feedback Output Isolated Output SMD 8-40 ----------- 5.0 12.0 20.0 200 80 80 110 --------- ----250 250 10 --------- SMD TSD-1040 Output #1 Output #2 LT1070 LT1172 Specifications subject to change without notice. Isolated Output Isolated Output Direct Feedback Output Isolated Output #1 Isolated Output #2 pmsm 6/97 20381 BARENTS SEA CIRCLE, LAKE FOREST, CA 92630 TEL: (949) 452-0511 FAX: (949) 452-0512 http://www.premiermag.com 3 DC/DC POWER CONVERSION TRANSFORMERS GENERAL ELECTRICAL SPECIFICATIONS AT 25OC - OPERATING TEMPERATURE RANGE 0OC TO +70OC To receive complete specifications & application information, request the respective part number data sheet. PART NUMBER TSD-1145 Designed For Use With APPLICATION PRIMARY HI-POT Vin Vout Io_max OCL HY Vdc (Vdc) (Vdc) (mA) Typ. Min. LM2585-5.0 6-18 5.0 600 64.0 Specifications subject to change without notice. 250 Temp Rise oC Typ. General Notes 15 Direct Feedback PCB Mount Method SMD pmsm 6/97 20381 BARENTS SEA CIRCLE, LAKE FOREST, CA 92630 TEL: (949) 452-0511 FAX: (949) 452-0512 http://www.premiermag.com 4 DC/DC POWER CONVERSION 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 PM-SM19 TURNS RATIO (Pri:Sec ± 5%) PRIMARY OCL (H Min.) 1CT : 1.00 1CT : 1.38CT 1CT : 2.00CT 1CT : 0.667 1CT : 1.6 CT Primary Pins 150 150 150 150 150 1-4 1-4 1-4 1-4 1-4 TYPICAL APPLICATION PRI/SEC HI-POT ( Vr ms ) GENERAL CHARACTERISTICS +5V to +10V +5V to +5V +3.3V to +5V +5V to +5V 1500 1500 1500 1500 1500 Volt Doubler Driving a Regulator Full Wave Center Tap Full Wave Center Tap Full Wave Bridge Full Wave Center Tap MECHANICALS TYPICAL APPLICATIONS VOLTAGE DOUBLER +5V RECOMMENDED P.C.B. LAYOUT Dimensions in mm (inches) 0.1uF 6 0.1uF 5 1 7 6 5 5 2.0 (.079) TYP 4 6 D2 3 7 0.70 (.028) 2 8 MBR0520L 0.33uF 8 MBR0520L 10.7 (.421) MAX PM-SM17 1CT : 2.0CT 6 1 7 3 6 4 5 D2 2 MAXIM MAX253 6.30 (.248) MAX MBR0520L 0.33uF 8 MBR0520L 1 6 5 Specifications subject to change without notice. 7 D2 8 11.6 (.457) 12.0 (.472) 4 MAXIM MAX253 3 D1 2 Vcc 10.1 (.398) PM-SM18 1CT : 0.667 6 1 8.10 (.319) ISO GND FULL WAVE BRIDGE +5V 0.1uF UNREGULATED OUTPUT 5V @ 100mA 8 D1 1 Vcc CORE CLAMP ISO GND FULL WAVE CENTER TAP +3.3V 0.1uF UNREGULATED OUTPUT 5V @ 200mA 8 D1 MAXIM MAX253 P PM-SMXX M YYWW 4 PM-SM16 1CT : 1.38CT 6 1 PIN#1 I.D. DOT 3 5 FULL WAVE CENTER TAP Vcc 2 ISO GND MBR0520L 4 6.00 (.236) 0.33uF 8 +5V 1 6 3x2.0 (.079) 8x1.0 (.040) 7 D2 8 8 0.33uF 4 MAXIM MAX253 REGULATED OUTPUT 5V @ 200mA 78L05 3 1 MBR0520L 1 2 10.1 (.398) D1 1 Vcc 8x1.0 (.040) PM-SM15 1CT : 1 8 UNREGULATED OUTPUT 5V @ 200mA 0.33uF ISO GND pmsm 6/97 20381 BARENTS SEA CIRCLE, LAKE FOREST, CA 92630 TEL: (949) 452-0511 FAX: (949) 452-0512 http://www.premiermag.com 5