SM5451数据手册SiliconMitus中文资料规格书

描述 Description

The  SM5451  is a  highly integrated quadruple-mode switched capacitor charger that integrates an infinite regulation loop and a very accurate 12-Bit ADC. The device features not only a  switched-capacitor architecture for a current doubler mode but also a path- through topology for a bypass mode.  
This very high efficiency switched capacitor charger with a very low R DS_ON  resistance reduces the thermal dissipation of a fast-charging system, which results in shorter charging time. The device integrates a stand-alone infinite regulation loop for IBUS, VBAT and IBAT using an internal Q RB  switch. The device also includes a  very accurate  12-bit  ADC  to provide input voltage, input current, output voltage, output current, THEM pin and die temperature needed to manage the charging profile of fast charging system. The device integrated powerful protection schemes such as over-voltage, over-current, under-current, over-temperature, a  flying capacitor short-circuit, and a watchdog timer to secure a robust charging for the system.  
The SM5451 is available in 42-bumps WLCSP package. 

特性 Features

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• -Highly  Integrated  Switched-Capacitor  Charger  with  a Quadruple mode
• o Maximum 6A Charging Current at 2:1 forward modeo Maximum 5A Charging Current at 1:1 forward modeo Maximum 2.25A IBUS Current at 1:2 reverse modeo Maximum 4.5A IBUS Current at 1:1 reverse mode
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• -97.15% Efficiency at VBAT=4V and IBAT=5A at 2:1 mode
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• -Embedded Infinite Regulation Loop with an internal Q RB Switch
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• o IBUS Input Current Regulationo VBAT Output Voltage Regulationo IBAT Output Current Regulation
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• -Very Accurate 6-Channel ADC with 12-Bit Resolution
• o VBUS Input Voltage with 4mV Resolutiono IBUS Input Current with 2mA Resolutiono VBAT Output Voltage with 2mV Resolutiono IBAT Output Current with 2mA Resolutiono THEM Temperature with 8mV Resolutiono Die Temperature with 1°C Resolution
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• -Smart Protections
• o Programmable Input/Output Over-Voltage Protectiono Programmable Input/Output Over-Current Protectiono Programmable Input Under-Current Protectiono Flying Capacitor Short Protectiono Die Thermal Shutdowno Watchdog Timer
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• -Up to 1MHz Fast-mode Plus I 2 C Interface
• -42-Bump, WLCSP Package 

应用 Application

Mobile, Tablet PC and Portable Devices