전자부품 데이터시트 검색엔진 |
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SI-3000KS 데이터시트(PDF) 2 Page - Sanken electric |
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SI-3000KS 데이터시트(HTML) 2 Page - Sanken electric |
2 / 2 page 15 ICs SI-3000KS Series ■External Dimensions (SOP8) (Unit : mm) 0.995max. 0.10 1.27 0.4±0.1 0.4±0.1 0.15+0.1 5.1±0.4 1.27 8765 1234 –0.05 0.12 M Pin Assignment q VC w VIN e VO r Sence (ADJ for SI-3012KS) t GND y GND u GND i GND Plastic Mold Package Type Flammability: UL 94V-0 Product Mass: Approx. 0.1 g ■Block Diagram ■Typical Connection Diagram ●SI-3012KS ●SI-3025KS, SI-3033KS ●SI-3012KS ●SI-3025KS, SI-3033KS R1, R2: Output voltage setting resistors The output voltage can be set by connecting R1 and R2 as shown above. The recommended value of R2 is 24 k Ω . R1=(VO–VADJ) ÷(VADJ/R2) 2 VIN 1 REF VC VO ADJ GND 4 8 7 6 5 3 TSD - + 2 VIN 1 REF VC VO Sense GND 4 8 7 6 5 3 TSD - + GND 5 to 8 VIN CIN R1 R2 2 VO CO 3 VC 1 ADJ 4 Load GND 5 to 8 VIN CIN R2 2 VO CO 3 VC 1 sense 4 Load CIN: Input capacitor (22 µF or larger) CO: Output capacitor (22 µF or larger) For SI-3000KS series, Co has to be a low ESR capacitor. When using the electrolytic capacitor, the SI-3000KS series may oscillate at a low temperature. ■Reference Data Copper Laminate Area vs. Thermal Resistance Copper Laminate Area vs. Power Dissipation •Obtaining the junction temperature Measure the temperature TL at the lead part of the GND pin (pin 7) with a thermocouple, etc. Then, substitute this value in the following formula to obtain the junction temperature. Tj=PD × θj–L + TL ( θj–L = 22°C/W) Copper laminate area (mm2) (GND terminal) 10 100 140 120 100 80 60 40 1000 Area of PC board : 40 ×40mm 10 100 1.2 1 0.8 0.6 0.4 0.2 0 1000 Tj=100 °C Area of PC board : 40×40mm Ta=25 °C Ta=50 °C Ta=80 °C Copper laminate area (mm2) (GND terminal) |
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