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BQ2050SN Datasheet(PDF) 8 Page - List of Unclassifed Manufacturers |
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BQ2050SN Datasheet(HTML) 8 Page - List of Unclassifed Manufacturers |
8 / 21 page Charge Compensation The bq2050 applies the following temperature compen- sation to NAC during charge: This compensation applies to both types of Li-Ion cells. Self-Discharge Compensation The self-discharge compensation is programmed for a nominal rate of 1 512 * NAC per day. This is the rate for a battery within the 20°C–30°C temperature range. This rate varies across 8 ranges from < 10°C to > 70°C, chang- ing with each higher temperature (approximately 10°C). See Table 5 below: Self-discharge may be disabled by connecting PROG5 =H. Digital Magnitude Filter The bq2050 has a digital filter to eliminate charge and dis- charge counting below a set threshold. The bq2050 setting is 200 µV for VSRD and 210µV for VSRQ. 8 bq2050 Temperature Range Typical Rate PROG5 = Z or L < 10°C NAC 2048 10–20°C NAC 1024 20–30°C NAC 512 30–40°C NAC 256 40–50°C NAC 128 50–60°C NAC 64 60–70°C NAC 32 > 70°C NAC 16 Table 5. Self-Discharge Compensation Approximate Discharge Rate Discharge Compensation Factor Efficiency < 0.5C 1.00 100% ≥ 0.5C 1.05 95% Table 3A. Graphite Anode Temperature Temperature Compensation Factor Efficiency ≥ 10°C 1.00 100% 0°C to 10°C 1.10 90% -10°C to 0°C 1.35 74% ≤ -10°C 2.50 40% Table 3B. Graphite Anode Approximate Discharge Rate Discharge Compensation Factor Efficiency <0.5C 1.00 100% ≥ 0.5C 1.15 86% Table 4A. Coke Anode Temperature Temperature Compensation Factor Efficiency ≥ 10°C 1.00 100% 0°C to 10°C 1.25 80% -10°C to 0°C 2.00 50% ≤ -10°C 8.00 12% Table 4B. Coke Anode Temperature Temperature Compensation Factor Efficiency < 10°C 0.95 95% ≥ 10°C 1.00 100% |
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