TOP245P_1 POWERINT [Power Integrations, Inc.], TOP245P_1 Datasheet
TOP245P_1
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TOP245P_1 Summary of contents
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Design Example Report 32W (47W peak) Multiple Output supply Title using TOP245P Input: 195 - 265 VAC Specification Output: 3.3V/3A, 5V/2A (2.5A Peak), 12V/0.5A (1.5A Peak), 20V/0.3A Application Set Top Box Author Power Integrations Applications Department Document DER-19 Number Date ...
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DER-19 TOP245P Multiple Output Set Top Box 1 Introduction ................................................................................................................ 4 2 Power Supply Specification........................................................................................ 5 3 Schematic .................................................................................................................. 6 4 Circuit Description ...................................................................................................... 7 4.1 Input EMI Filtering............................................................................................... 7 4.2 TOPSwitch Primary............................................................................................. 7 4.3 Output Rectification............................................................................................. 7 4.4 Output ...
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DER-19 TOP245P Multiple Output Set Top Box Figure 1 – Populated Circuit Board (Scale in cm).............................................................. 4 Figure 2– TOP245P Schematic for 32W cont / 46W peak................................................. 6 Figure 3 – Printed Circuit Layout (Scale not 1:1) ............................................................... 8 Figure ...
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DER-19 TOP245P Multiple Output Set Top Box 1 Introduction This engineering report describes a multiple output evaluation board designed using TOP245P. The specification chosen is targeted towards new Set Top Box systems that incorporate a hard disk. These systems require ...
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DER-19 TOP245P Multiple Output Set Top Box 2 Power Supply Specification Description Input Voltage Frequency Output Output Voltage 1 Output Ripple Voltage 1 Output Current 1 Output Voltage 2 Output Ripple Voltage 2 Output Current 2 Output Voltage 3 Output ...
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DER-19 TOP245P Multiple Output Set Top Box 3 Schematic Figure 2– TOP245P Schematic for 32W cont / 46W peak Power Integrations, Inc. Tel: +1 408 414 9200 Fax: +1 408 414 9201 www.powerint.com March 30, 2004 Page ...
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DER-19 TOP245P Multiple Output Set Top Box 4 Circuit Description This power supply uses the latest generation TOPSwitch in a DIL08 package to minimize heatsink requirements designed for 32W continuous operation in a 50°C ambient with magnetics designed ...
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DER-19 TOP245P Multiple Output Set Top Box 5 PCB Layout The evaluation board was implemented using a single copper layer. Figure 3 shows the component placement and underside copper routing. Figure 3 – Printed Circuit Layout (Scale not 1:1) Power ...
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DER-19 TOP245P Multiple Output Set Top Box 6 Bill Of Materials Reference R1,R2 R10 R11 R12 C3,C12 C8,C9 C10 C11 C13 C14 C15 C16 C17 C18 D1,D2,D3,D4 D7,D8 D10 D11 D12 FU1 L7,L8,L9 VDR1 Page Quantity 2 ...
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DER-19 TOP245P Multiple Output Set Top Box 7 Transformer Specification 7.1 Electrical Diagram 7.2 Electrical Specifications Electrical Strength Primary Inductance Resonant Frequency Primary Leakage Inductance 7.3 Materials Item [1] Core: EF30 CORE, 3C85, Gapped for 234nH/T [2] Bobbin: EF30, 10 ...
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DER-19 TOP245P Multiple Output Set Top Box 7.4 Transformer Build Diagram Figure 5 – Transformer Build Diagram 7mm 10mm 7.5 Transformer Construction Bobbin Preparation Place 3mm of Margin tape on each side of the ...
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DER-19 TOP245P Multiple Output Set Top Box 8 Transformer Spreadsheets This design was produced using PIExpert assuming a TOP245P device with a current limit capability of 1.1A and an Rdson of 4Ω. The data below reflects the full continuous load, ...
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DER-19 TOP245P Multiple Output Set Top Box VMIN Volts VMAX Volts VCLO Volts PZ Watts VDB Volts PIVB Volts Power Supply Output Parameters VDx Volts PIVSx Volts ISPx Amps ISRMSx Amps IRIPPLEx Amps Transformer Construction Parameters Core/Bobbin E30/15/7 Margin Core ...
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DER-19 TOP245P Multiple Output Set Top Box AE cm^2 ALG nH/T^2 BM mTesla BP mTesla BAC mTesla uHenries LSEC nHenries Secondary Parameters NSx Rounded Down NSx Rounded Volts Down Vox Rounded Up NSx Rounded Up Volts Vox ...
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DER-19 TOP245P Multiple Output Set Top Box 9 Performance Data All measurements performed at room temperature input frequency. 9.1 Efficiency Full power efficiency was measured as a function of line voltage and Figure 6 gives the resulting profile. ...
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DER-19 TOP245P Multiple Output Set Top Box 9.2 No-load Input Power Under zero output load conditions, the input power was measured at 400mW at 265V input. 9.3 Peak Power The prototype was loaded to the specified peak power levels in ...
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DER-19 TOP245P Multiple Output Set Top Box 9.4.2 Line Line regulation was measured at full continuous output power. The regulation, expressed as a percentage on nominal rail voltage, and as a function of line voltage is shown in Figure 9 ...
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DER-19 TOP245P Multiple Output Set Top Box 10 Thermal Performance At full continuous output power, the temperature of key components was monitored using thermocouples 25°C ambient, Figure 11 gives the resulting temperature profiles. 100 ...
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DER-19 TOP245P Multiple Output Set Top Box 11.2 Output Voltage Start-up Profile (Full Power) Figure 14 -Start-up Profile, 230V Lower: 3V3 div Upper: 5V div Figure 16 - Start-up Profile, 230V Lower: 3V3, 1 ...
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DER-19 TOP245P Multiple Output Set Top Box 11.3 Drain Voltage and Current Start-up Profile Figure 17 - 195 V Input and Maximum Load. AC Lower 0 div. DRAIN Upper 200 V & ...
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DER-19 TOP245P Multiple Output Set Top Box 11.5 Output Ripple Measurements 11.5.1 Ripple Measurement Technique For DC output ripple measurements, a modified oscilloscope test probe must be utilized in order to reduce spurious signals due to pickup. Details of the ...
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DER-19 TOP245P Multiple Output Set Top Box 11.5.2 Measurement Results Figure 22 – 3V3 Ripple, 230 div div Figure 24 – 5V Ripple, 230 V , Full Load ...
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DER-19 TOP245P Multiple Output Set Top Box Figure 26 – 12V Ripple, 230 div div Figure 28 – 20V Rail Ripple, 230 div div Page ...
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DER-19 TOP245P Multiple Output Set Top Box 12 Conducted EMI Figure 30 - Conducted EMI, Full Continuous Power, 230 V Output ground connected to protective earth. Worst case live/neutral measurement. Figure 31 - Conducted EMI, Full Continuous Power, 230 V ...
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DER-19 TOP245P Multiple Output Set Top Box 13 Revision History Date Author March 30, 2004 IM For the latest updates, visit our Web site: www.powerint.com Power Integrations reserves the right to make changes to its products at any time to ...