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DER-94 Datasheet(PDF) 17 Page - Power Integrations, Inc. |
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DER-94 Datasheet(HTML) 17 Page - Power Integrations, Inc. |
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17 / 34 page  DER-94 LCD Monitor Internal Supply September 12, 2005 Page 17 of 34 Power Integrations Tel: +1 408 414 9200 Fax: +1 408 414 9201 www.powerint.com 7.6 Transformer Spreadsheet ACDC_TOPGX_Rev1.2_052901 Copyright Power Integrations Inc. 2001 INPUT INFO INFO OUTPUT OUTPUT UNIT TOP_GX_052901.xls: TOPSwitch-GX Continuous/Discontinuous Flyback Transformer Design Spreadsheet ENTER APPLICATION VARIABLES Customer VACMIN 90 Volts Minimum AC Input Voltage VACMAX 265 Volts Maximum AC Input Voltage fL 50 Hertz AC Mains Frequency VO 5 Volts Output Voltage PO 45 Watts Output Power n 0.8 Efficiency Estimate Z 0.5 Loss Allocation Factor VB 12 Volts Bias Voltage tC 3 mSeconds Bridge Rectifier Conduction Time Estimate CIN 120 uFarads Input Filter Capacitor ENTER TOPSWITCH-GX VARIABLES TOP-GX TOP246 Universal 115 Doubled/230V Chosen Device TOP246 TOP246 Power Out Power Out 90W 150W KI 0.8 External Ilimit reduction factor (KI=1.0 for default ILIMIT, KI <1.0 for lower ILIMIT) ILIMITMIN 1.944 1.944 Amps Use 1% resistor in setting external ILIMIT ILIMITMAX 2.376 2.376 Amps Use 1% resistor in setting external ILIMIT Frequency - (F)=132kHz, (H)=66kHz H Half (H) frequency option - 66kHz fS 65000 6.50E+04 6.50E+04 Hertz TOPSwitch-GX Switching Frequency: Choose between 132 kHz and 66 kHz fSmin 6.15E+04 6.15E+04 Hertz TOPSwitch-GX Minimum Switching Frequency fSmax 7.05E+04 7.05E+04 Hertz TOPSwitch-GX Maximum Switching Frequency VOR 90 Volts Reflected Output Voltage VDS 10 Volts TOPSwitch on-state Drain to Source Voltage VD 0.5 Volts Output Winding Diode Forward Voltage Drop VDB 0.7 Volts Bias Winding Diode Forward Voltage Drop KP 0.70 Ripple to Peak Current Ratio (0.4 < KRP < 1.0 : 1.0< KDP<6.0) ENTER TRANSFORMER CORE/CONSTRUCTION VARIABLES Core Type EER28 Core EER28 EER28 P/N: PC40EER28-Z Bobbin EER28_BOBBIN EER28_BOBBIN P/N: BEER-28-1112CPH AE 0.821 0.821 cm^2 Core Effective Cross Sectional Area LE 6.4 6.4 cm Core Effective Path Length AL 2870 2870 nH/T^2 Ungapped Core Effective Inductance BW 17.2 17.2 17.2 mm Bobbin Physical Winding Width M 3 mm Safety Margin Width (Half the Primary to Secondary Creepage Distance) L 2 Number of Primary Layers |
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