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BU1840AMUV-E Scheda tecnica(PDF) 8 Page - Rohm |
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BU1840AMUV-E Scheda tecnica(HTML) 8 Page - Rohm |
8 / 17 page Datasheet Datasheet . 8/14 BU1840AMUV TSZ02201-0Q1Q0AJ00130-1-2 © 2012 ROHM Co., Ltd. All rights reserved. 2.AUG.2012 Rev.001 TSZ22111・15・001 www.rohm.com ● Charging Current Sense Register (R1) It is necessary to decide the constant of R1 in proportion to the maximum charge current. Maximum charging current = “Maximum input power” × “Efficiency” ÷ “Voltage of battery” Maximum charging current [mA] R1 [mΩ] Maximum charging current [mA] R1 [mΩ] 60 560 350 100 80 470 400 100 100 390 480 82 120 330 580 68 150 220 700 56 200 180 820 47 250 150 1000 39 300 120 1200 33 ● Charging Current Data The current for each 1bit of the charge current data is decided by the following calculating formula Charging current=(Charging current data[Hex]-2B[Hex]) × ”Charging current / 1bit” R1 [mΩ] Charging current/1bit [mA] R1 [mΩ] Charging current/1bit [mA] 33 9.685 150 2.131 39 8.195 180 1.776 47 6.800 220 1.453 56 5.707 270 1.184 68 4.700 330 0.9685 82 3.898 390 0.8195 100 3.196 470 0.6800 120 2.663 560 0.5707 |
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