TABLE 1: ELECTRICAL SPECIFICATIONS AT 25 O C FIGURE 1: SCHEMATIC DIAGRAM SWITCHING TRANSFORMER DESIGNED FOR USE WITH POWER INTEGRATIONS TOP223Y. REFER TO APPLICATION CIRCUIT OF FIGURE 3. PARAMETER MIN. PRIMARY INDUCTANCE (2-1) VOLTAGE = 0.250Vrms FREQUENCY = 100 KHZ 950 SPEC LIMITS TYP. MAX. 1060 WHITE DOT ON TOP OF BOBBIN DENOTES PIN #1 UNITS 1 µHY 1170 PRIMARY TURN RATIO'S: SECONDARY (8-7) : PRIMARY (2-1) BIAS (3-4) : PRIMARY (2-1) PRI LEAKAGE IND. (7-8 SHORTED) VOLTAGE = 0.250Vrms FREQUENCY = 100 KHZ --------------- 1:6.083 1:14.60 --------------- + 3% + 3% -------- 30.0 45.0 µHY 2 3 8 SECONDARY 7 BIAS 4 HIPOT: PRIMARY TO SECONDARY BIAS TO SECONDARY APP CIRCUIT PARAMETERS: (1) AC LINE VOLTAGE 47/400 Hz OUTPUT VOLTAGE OUTPUT CURRENT CONTINUOUS OUTPUT CURRENT PEAK LINE REGUALTION (85 TO 265Vac) LOAD REGULATION .50 to 1.00A VOLTAGE @ 0.0A EXT LOAD 3000 3000 --------------- --------------- Vrms Vrms 85 -------15.0 --------------1.0 2.5 17.0 265 Vac Vdc Amps Amps % % Vdc 0.0 0.0 1.0 2.0 NOTE1: REINFORCED INSULATION SYSTEM, UL1950, IEC950, CSA-950: A) ALL MATERIALS MEET "UL", "CSA" & "IEC" REQUIREMENTS B) TRIPLE BASIC INSULATED SECONDARY. C) DESIGNED TO MEET >6.2mm CREEPAGE REQUIREMENTS. D) VARNISH FINISHED ASSEMBLY. E) UL1950 & CSA-950 CERTIFIED: FILE #E162344. F) UL CLASS (B) 130 INSULATION SYSTEM PM130-R1, PM130-H1, PM130-H1A (UL FILE #E177139) OR ANY UL AUTHORIZED CLASS (B) INSULATION SYSTEM. (1) REFER TO APPLICATION CIRCUIT OF FIGURE 3. FIGURE 2: PHYSICAL DIMENSIONS mm (INCHES) 8 7 6 5 P TSD-737 M YYWW PIN #1 WHITE DOT 1 2 3 4 23.00 (.906) MAX CORE TAPED 18.00 (.709) MAX UL INSULATION SYMBOL AND MANUFACTURER IDENTIFICATION HERE 21.00 (.827) MAX 1 2 5.00 (.197) 3 4 4.0 (.157) MIN 6.10 (.240) MAX 11.50 (.453) MIN 12.50 (.492) 0.8 DIA. (.032) REV. 6/12/97 10/10/98 04/14/99 09/19/00 12/13/00 DESCRIPTION OF CHANGES UPDATED TO TOP223 IC. NO OTHER CHANGES UPDATED TO ADD UL 1950 & CE-950 APPROVAL & MARKING UPDATED TO UL CLASS (B) 130 INSULATION SYSTEM CORRECT R1 ON FIG 3 APPLICATION CIRCUIT BY TO TO MD PP CORRECT SEC. DWGS FROM 12 TURNS TO 12 TURNS BIFILAR, ADDED BIAS MARGIN TAPE MD EI22/19/6, 8-PIN VERTICAL BOBBIN P Premier M Magnetics Inc. UNLESS OTHERWISE SPECIFIED DIMENSIONS ARE IN MM DIMENSIONAL TOLERANCES ARE: DECIMALS ANGLES .X + .25 +0 O 30' .XX + .15 DO NOT SCALE DRAWING TRANSFORMER CONTROL DRAWING PREMIER P/N: TSD-737 REVISION: 12/13/00 DRAWN BY: TOM O'NEIL REF: 38-0027-00 SCALE: NONE SHEET: 1 OF 6 APPLICATION NOTES Premier Magnetics' TSD-737 Switch Mode Transformer was designed for use with Power Integrations, Inc. TOP223Y three terminal off-line PWM switching regulator in a low cost Isolated Flyback Buck-Boost circuit configuration. The feedback implementation is accomplished indirectly by regulating the bias winding voltage. This is the lowest cost topology but has the drawback of poor load regulation. As such this topology is intended for use where load power is fairly constant. Resistor R2 provides an output clamp to prevent output voltage runaway and possible circuit damage under a no load condition. The TOPXXX series from Power Integrations, Inc. are self contained 100KHz three terminal voltage controlled PWM switching regulators. This series contains all necessary functions for an off-line switch mode controlled DC power source. These switching regulators provide a very simple solution to off-line designs. The inductors and transformer used with the TOPXXX are critical to the performance of the circuit. They define the overall efficiency, output power and overall physical size. Below is a universal input 15 watt application circuit utilizing Power Integrations TOP223 switching regulator in the isolated flyback buck-boost configuration. The component values listed are intended for reference purposes only. FIGURE 3: TYPICAL APPLICATION CIRCUIT BR1 KBP04M 400V, 1.5A EMI FILTER F1 3.1A 250v LINE 85-265Vac 50/60Hz ~ + 2 HOT RAIL +100 to 375Vdc C1 47 uF 400V C6 0.1uF 4 NEUT 3 + 1 L1 PMCU-0330 33mHY ~ - C6 = 0.1uF 250Vac X2-Saftey Cap CLAMP NETWORK VR1 P6KE200A D1 MUR160 PREMIER MAGNETICS PART NUMBERS: (REQUEST DATA SHEETS BY PART#) L1 = PMCU-0330 33mHy EMI/RFI CMC T1 = TSD-737 MAIN SWITCHING TRANSFORMER L2 = VTP-01001 10uHy, 1.0Amp INDUCTOR C1, 47.0 uF, 400V Low Profile Type: Nichicon # UVS2G470MRA, 85C Nichicon # URT2G470MRA, 105C Diameter=18mm (.708) Length=25mm (.984) T1 TSD-737 1 PRI 8 2 + D2 1N4148 SEC 3 7 R1 100 L2 VTP-01001 10uH @ 1.0A D3 MUR610CT C2 220uF 25V + C3 220uF 25V +15Vdc @ 1.0A R2 1.5K 1/4W C4 + 220uF 25V RTN BIAS 4 U1 POWER INT. TOP223Y SOURCE + DRAIN C5 47uF KELVIN CONNECT CONTROL C7 & C8 = 250Vac Y-SAFTEY CAPACITORS EMI FILTER C7 2.2nF C8 2.2nF HIGH VOLTAGE RETURN P Premier M Magnetics Inc. UNLESS OTHERWISE SPECIFIED DIMENSIONS ARE IN MM DIMENSIONAL TOLERANCES ARE: DECIMALS ANGLES .X + .25 +0 O 30' .XX + .15 DO NOT SCALE DRAWING TRANSFORMER CONTROL DRAWING PREMIER P/N: TSD-737 REVISION: 12/13/00 DRAWN BY: TOM O'NEIL REF: 38-0027-00 SCALE: NONE SHEET: 2 OF 6