摘要： 产品系统电池 （蝙蝠 SYS） 连接阻抗是至关重要的通过减少净空高度和耗散功率影响电池运行时。外部通晶体管降低了 50%以上的阻抗。本应用指南显示 MAX8662 电源管理 IC 智能电源选择器功能驱动器与外部 MOSFET 减少开关电阻和功率耗散。显示性能数据。Maxim > App Notes > Battery Management
Keywords: battery, load switch, efficiency, charger Dec 15, 2010
APPLICATION NOTE 4656
External MOSFET Reduces IR Losses in Smart Power Selector-
Based Chargers
By:Hubert Bugajski
Abstract:Battery-to-system (BAT-to-SYS) connection impedance is critical and affects battery runtime by reducing headroom and
dissipating power. An external pass transistor lowers the impedance by more than 50%. This application note shows the
MAX8662 power-management IC with Smart Power Selector functionality drives an external MOSFET to reduce switch resistance
and power dissipation. Performance data are shown.
This design idea appeared in the November 15, 2010 issue of EE Times .
Introduction
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