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lên diễn đàn là để tranh luận tìm ra kiến thức đúng chứ o phải để phản bác nhau nha .
nói có sách mách có chứng vao trang của nó mà xem thông số kỹ thuật và người thiết kế DS tính toán
http://www.maxim-ic.com/app-notes/index.mvp/id/505
trích dẫn 1 đoạn:
Sample Lifetime Calculations
Case I—The system is designed to be in battery backup 100% of the time at room temperature. The electrolyte evaporation at room temperature is so low that it can virtually be ignored. The lifetime is limited by the IC's current drain.
Electrical Consumption Leg
Battery capacity (BR1632) = 120mAh
IC current drain = 1.2µA Duty cycle = 100%
Battery lifetime = (0.12Ah) / (1.2 × 10-6A) = 100,000 hours = 11.4 years
Electrolyte Evaporation Leg
Battery lifetime at +25°C = 230 years
Calculation : (230 × 11.4) / (230 + 11.4) = 10.9 years
Case II—The system is designed to be in battery backup 50% of the time at +60°C. The lifetime due to either the electrical consumption or electrolyte evaporation would appear to be approximately 20 years. The combination of the two mechanisms will cause the electrolyte to be consumed in 10 years.
Electrical Consumption Leg
Battery capacity (BR1632) = 120mAh
IC current drain = 1.2µA
Battery lifetime = (0.12Ah) / (1.2 x 10-6A x 50%) = 200,000 hours = 22.8 years
Electrolyte Evaporation Leg
Battery lifetime at +60°C = 19.1 years
Calculation: (19.1 x 22.8) / (19.1 + 22.8) = 10.4 years
còn đồ việt nam làm, linh kiện trung Quốc thì trừ hao đi nhé !
nói có sách mách có chứng vao trang của nó mà xem thông số kỹ thuật và người thiết kế DS tính toán
http://www.maxim-ic.com/app-notes/index.mvp/id/505
trích dẫn 1 đoạn:
Sample Lifetime Calculations
Case I—The system is designed to be in battery backup 100% of the time at room temperature. The electrolyte evaporation at room temperature is so low that it can virtually be ignored. The lifetime is limited by the IC's current drain.
Electrical Consumption Leg
Battery capacity (BR1632) = 120mAh
IC current drain = 1.2µA Duty cycle = 100%
Battery lifetime = (0.12Ah) / (1.2 × 10-6A) = 100,000 hours = 11.4 years
Electrolyte Evaporation Leg
Battery lifetime at +25°C = 230 years
Calculation : (230 × 11.4) / (230 + 11.4) = 10.9 years
Case II—The system is designed to be in battery backup 50% of the time at +60°C. The lifetime due to either the electrical consumption or electrolyte evaporation would appear to be approximately 20 years. The combination of the two mechanisms will cause the electrolyte to be consumed in 10 years.
Electrical Consumption Leg
Battery capacity (BR1632) = 120mAh
IC current drain = 1.2µA
Battery lifetime = (0.12Ah) / (1.2 x 10-6A x 50%) = 200,000 hours = 22.8 years
Electrolyte Evaporation Leg
Battery lifetime at +60°C = 19.1 years
Calculation: (19.1 x 22.8) / (19.1 + 22.8) = 10.4 years
còn đồ việt nam làm, linh kiện trung Quốc thì trừ hao đi nhé !
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