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首 页 > 新闻动态 > 公司新闻 > 供应 TPS65012RGZR TI QFN48电源和电池管理IC 供应 TPS65012RGZR TI QFN48电源和电池管理ICFEATURES DESCRIPTION
APPLICATIONS TPS65012 SLVS504A–MARCH 2004–REVISED JANUARY 2005 POWER AND BATTERY MANAGEMENT IC FOR Li-ION POWERED SYSTEMS · Linear Charger Management for Single Li-Ion The TPS65012 is an integrated power and battery or Li-Polymer Cells management IC for applications powered by one · Dual Input Ports for Charging From USB or Li-Ion or Li-Polymer cell and which require multiple From Wall Plug, Handles 100-mA / 500-mA power rails. The TPS65012 provides two highly USB Requirements efficient, step-down converters targeted at providing the core voltage and peripheral, I/O rails in a pro- · Charge Current Programmable via External cessor-based system. Both step-down converters en- Resistor ter a low power mode at light load for maximum · 1-A, 95% Efficient Step-Down Converter for efficiency across the widest possible range of load I/O and Peripheral Components (VMAIN) currents. The LOW_PWR pin allows the core con· 400-mA, 90% Efficient Step-Down Converter verter to lower its output voltage when the application processor goes into deep sleep. The TPS65012 also for Processor Core (VCORE) integrates two 200-mA LDO voltage regulators, which · 2x 200-mA LDOs for I/O and Peripheral are enabled via the serial interface. Each LDO Components, LDO Enable via Bus operates with an input voltage range between 1.8 V · Serial Interface Compatible With I2C, Supports and 6.5 V, allowing them to be supplied from one of 100-kHz, 400-kHz Operation the step-down converters or directly from the battery. · LOW_PWR Pin to Lower or Disable Processor The TPS65012 has a highly integrated and flexible Core Supply Voltage in Deep Sleep Mode Li-Ion linear charger and system power management. · 70-μA Quiescent Current It offers integrated USB-port and ac-adapter supply management with autonomous power-source selec- · 1% Reference Voltage tion, power FET and current sensor, high accuracy · Thermal Shutdown Protection current and voltage regulation, charge status, and charge termination. The TPS65012 charger automatically selects the · All Single Li-Ion Cell-Operated Products USB port or the ac adapter as the power source for Requiring Multiple Supplies Including: the system. In the USB configuration, the host can – PDA increase the charge current from the default value of – Cellular/Smart Phone maximum 100 mA to 500 mA via the interface. In the ac-adapter configuration, an external resistor sets the – Internet Audio Player maximum value of charge current. – Digital Still Camera · Digital Radio Player The battery is charged in three phases: conditioning, constant current, and constant voltage. Charge is · Split Supply DSP and μP Solutions normally terminated based on minimum current. An internal charge timer provides a safety backup for charge termination. The TPS65012 automatically restarts the charge if the battery voltage falls below an internal threshold. The charger automatically e |
