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AS3658F-BCTP Datasheet(PDF) 41 Page - ams AG |
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AS3658F-BCTP Datasheet(HTML) 41 Page - ams AG |
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41 / 158 page  www.austriamicrosystems.com Revision 1v13 40 - 157 AS3658 Data Sheet Confidential - Detail ed Descri ption-Power Management Functions Figure 11. Backup Battery Charger Characteristics 5 BBCVolt 0 R/W This value determines the maximum charging voltage VBBC. 0 VBBC=2.5V 1 VBBC=3.0V 6 BBCPwrSave 1 R/W 0 Normal operation of the backup battery charger 1 The backup battery charger checks if it is actually charging the battery (bit BUChAct=’1’) and it is disabled if it is not. Every 10s (every 64s in state “Off”) the voltage of the backup battery is checked again to determine if charging is required. This practically reduces the current consumption to 0 if the backup battery is full. 7- - reserved Table 34. Backup Battery Charger Register Addr: 38 Backup Battery Charger This register controls the Backup battery charger mode Bit Bit Name Default Access Description IBACK 400µA 200µA 100µA 50µA Vback_lim-VDelta Vback_lim VBACK Rb=0FF Rb=0N |
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