전자부품 데이터시트 검색엔진 |
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FAN5345S20X 데이터시트(PDF) 7 Page - Fairchild Semiconductor |
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FAN5345S20X 데이터시트(HTML) 7 Page - Fairchild Semiconductor |
7 / 14 page © 2011 Fairchild Semiconductor Corporation www.fairchildsemi.com FAN5345 • Rev. 1.0.0 7 Typical Characteristics VIN = 3.6V, TA = 25C, ILED = 25mA, L = 10µH, COUT = 1.0µF, and CIN = 10.0µF. 50% 60% 70% 80% 90% 2.5 3.0 3.5 4.0 4.5 Input Voltage (V) -40C +25C +85C 50% 60% 70% 80% 90% 2.5 3.0 3.5 4.0 4.5 Input Voltage (V) -40C +25C +85C Figure 10. Efficiency vs. Input Voltage vs. Temperature for 5 LEDs in Series Figure 11. Efficiency vs. Input Voltage vs. Temperature for 7 LEDs in Series -0.4 -0.3 -0.2 -0.1 0.0 0.1 0.2 2.5 3.0 3.5 4.0 4.5 Input Voltage (V) -40°C +25°C +85°C 1000 1050 1100 1150 1200 1250 2.5 3.0 3.5 4.0 4.5 Input Voltage (V) -40°C +25°C +85°C Figure 12. Delta of VFB Over Input Voltage and Temperature for 7 LEDs with L=10µH and COUT=1.0µF Figure 13. Frequency vs. Input Voltage vs. Temperature 18.5 19.0 19.5 20.0 20.5 21.0 2.5 3.0 3.5 4.0 4.5 Input Voltage (V) 5 LEDs L = 10µH COUT = 1.0µF ILED = 25mA 29.0 29.5 30.0 30.5 31.0 31.5 2.5 3.0 3.5 4.0 4.5 Input Voltage (V) 7 LEDs L = 10µH COUT = 1.0µF ILED = 25mA Figure 14. OVP vs. Input Voltage: FAN5345S20X Figure 15. OVP vs. Input Voltage: FAN5345S30X |
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