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| STR20000 Series Switching Type Features q q q q q Requires only 4 external components Small size and high efficiency Low switching noise Variable output voltage Use of Sanken semiconductors components ensures high reliability Chopper * Self Oscillation Type Applications q For power supplies in office equipment such as electronic typewriters, printers and copiers q For power supplies in VCRs, personal CB radios (fixed stations), etc. External View s Absolute Maximum Ratings (Ta=25C) Parameter DC Input Voltage DC Output Current Power Dissipation Operating Temperature Storage Temperature Thermal Resistance (junction-to-case) Symbol VIN IO PD Top Tstg Rth(j-c) Ratings STR20005 45 2.0 (pulse 3.0) 55 (TC=25C) 13 (TC=100C) -20 to +100 -20 to +125 1.8 V A W C C C/W Unit s Electrical Characteristics (Ta=25C) Ratings Parameter Symbol min DC Input Voltage Range VIN Condition VO Condition 5.0 8 IO=1.0A 5.1 VIN=20V, IO=1.0A 72 VIN=20V, IO=1.0A 50 VIN=15 to 25V, IO=1.0A 100 VIN=20V, IO=0.5 to 1.5A 45 f=100 to 120Hz 30 VIN=20V, IO=1.0A 5.2 STR20005 typ max 40 V Unit Output Voltage V Efficiency Condition VOLINE Condition VOLOAD Condition RREJ Condition f Condition % Line Regulation mV Load Regulation mV Ripple Rejection dB Switching Frequency kHz 12 s Outline Drawing/Terminal Connections (unit: mm) 15.4 3.20.2 (18) 0.3 4.50.2 9.9 0.2 1.60.2 5.00.2 Plastic Mold Package Type Flammability: UL94V-0 Terminal Connections q Output Voltage Adjustment w Output Voltage Detection e Switching Output (backside of case) r Input t Ground Weight: Approx. 8.2 g 3.20.1 5 STR Type Lot number 3.4max. 23.00.3 (38.0) (43.0) 28.00.3 36 7.00.2 5 0.6 -0.1 2.54 0.1 0.1 0.1 +0.2 (15.0) 1.20.15 2.00.1 5 1.00.1 0.6 -0 +0.2 3.81 3.81 2.54 0.1 (7.62) (12.7) 17.80.3 4.00.1 5 5 Note: Dimensions marked with * are measured at the roots of the leads. qwert s Block Diagram 4 Tr1 R1 s Standard External Circuit 3 L=200H 2 R2 R3 VIN DC Input + 1000F 4 3 2 5 1 VR2 VR1 VOUT DC Output Di RU3M + 1000F MIC1 Start Circuit Reference Voltage R4 1 GND GND C1 R5 5 Use VR1 and VR2 only when adjusting the output voltages. VR1 : Vout down VR2 : Vout up RU3M forward voltage : 0.7V s Typical Operating Characteristics Rise Characteristics 10 Ta=25C Efficiency Characteristics 100 90 80 70 60 50 40 30 20 10 0 Ta=25C VIN 8V 20V 30V 40V Ta-PD Characteristics 25 Without Mica With Silicone Grease Heatsink: Aluminum Unit: mm 150x150x2 (3.3C/w) Power Dissipation PD (W) Output Voltage VO (V) 8 Efficiency (%) 20 15 100x100x2 (5.2C/w) 6 IO 0A 1A 4 2A 10 5 75x75x2 (7.6C/w) 2 0 Without heatsink 0 2 4 6 8 10 12 14 16 18 20 Input Voltage VIN (V) 0 0.5 1 1.5 2 2.5 0 -20 0 20 40 60 80 100 Output Current IO (A) Ambient Temperature Ta (C) 13 |
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