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EFP01 数据表(PDF) 30 Page - Silicon Laboratories |
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EFP01 数据表(HTML) 30 Page - Silicon Laboratories |
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30 / 158 page  4. Typical Connection Diagrams 4.1 Device Configurations The EFP01's flexible configuration options support a wide variety of input supplies and output voltages. Consult AN1187: EFP01 Hardware Design Considerations for additional information, including reference schematics and layout recom- mendations. 4.1.1 Wired Buck Configuration (EFP0101 & EFP0102) The wired buck configuration is targeted at batteries with a nominal voltage above 2.5V. In this mode, DCDC A bucks the supply volt- age to a lower voltage. The wired buck configuration is suitable for a wide range of batteries and input supplies. For example: • Single lithium thionyl chloride (Li/SOCl2) primary cell (3.0 to 3.65V) • Single li-ion/li-polymer (typically LiCoO2) rechargeable batteries (2.7 to 4.35V) • Single lithium iron phosphate (LiFePO4) rechargeable battery (2.5 to 3.65V) • Line power / USB (< 5.5V) The supported operating mode settings for each converter in this configuration are shown below: Table 4.1. Supported Operating Mode Settings Converter / LDO Operating Mode Bitfield Supported Modes DCDC A BB_CTRL3.BB_MODE WiredBuck DCDC B BK_CTRL1.BK_MODE Disabled, BuckOnly, BuckLDO, or LDOOnly LDO C LDOC_CTRL.LDOC_ENA_SA Enabled or Disabled Typical power supply connections for a wired buck configuration are shown below. ` Main Supply + – VDD VOA VOC (1.8V–5.5V) 10µF 2.2µH 2.2µH VDDB VOA SW VOC LB LDO C VOA Buck DC-DC B Boost DC-DC A Buck DC-DC A VOB LDO B LA2 LA1 Low Voltage VDDA 0.1µF ` VOB ` VIO I2C SDA I2C SCL IRQ Control 10µF 0.1µF 10µF 0.1µF 0.1µF VIO 0.1µF ` To Host MCU 2.2uF for EFP0102 10uF for EFP0101 VOC output capacitors only required if enabled Figure 4.1. Wired Buck Configuration EFP01 Energy Friendly PMIC Family Data Sheet Typical Connection Diagrams silabs.com | Building a more connected world. Rev. 1.3 | 30 |
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