TPS65800

` Linear Charge Management for Single Li-Ion, Li-Pol Cell, Including Charge Status with Reverse-Current, Short-Circuit, Thermal Protection, and Selectable Charging Voltage(4.2-V or 4.36-V)
` DPPM Management to Allow AC Adapter or USB to Simultaneously Power the System and Charge the Battery, Supporting up to 1.5 A
` Integrated USB Charge Control With Selectable Charge Rates
` Battery Monitoring, Including Temperature Control and Recharge Detection
` 3.3-V, 20-mA, LDO for USB Enumeration
` 2 High-Efficiency Wide-Range, 600-mA Adjustable-Output Buck DC-DC Converters
` CCD or LCD Boost Regulator Driving Up To 6 White LEDS
` 2 Programmable General-Purpose LDOs
` 3 Programmable High-PSRR LDOs
` Programmable 1.8-/3.0-V SIM Supply
` 1 Fixed 3.3-V LDO
` Backup Regulated Output for Real Time Clock (RTC) Applications With Low Leakage Current
` 8-Channel (2 External) A/D Converter With 10-Bit Resolution
` 3 Programmable General-Purpose Input/Output Ports
` 2 PWM Open-Drain Drivers
` RGB Programmable Current-Source LED Driver
` Automatic Sleep Mode for Low-Power Operation
` I2C Interface With Comprehensive Set of Control Registers
` Adjustable Reset Controller Management With the Host Processor
` Small and Thermally-Efficient QFN, 8 * 8 mm Package.
` Operating Ambient Temperature 40°C to 85°C

The TPS65800 is designed to provide, in a single monolithic IC, flexible charge and system power-path management for a USB-port and AC-adapter supply; as well as multiple power supply outputs, and a number of value-added circuit options to supply an integrated solution for applications powered by one Li-Ion or Li-Polymer cell, and requiring multiple voltage rails. The TPS65800 features two highly efficient, step-down converters targeted at providing the core voltage, and peripheral I/O rails in a processor-based system. Both converters enter a low-power mode at light load for maximum efficiency across the widest possible range of load currents. The TPS65800 also integrates a boost-type LED driver, 6 LDO regulators (5 programmable and one fixed), one programmable SIM interface LDO, and an integrated backup block for a battery/rechargeable capacitor.

The TPS65800 powers the system while independently charging the battery. This feature reduces the charge and discharge cycles on the battery, allows for proper charge termination and system operation with an absent or defective battery pack. The system can instantaneously turn on using an external power source in the case of a deeply discharged battery pack.

The TPS65800 automatically selects the USB port or the AC adapter as the power source for the system. In the USB configuration, the host can select from the two preset charge rates of 100 mA and 500 mA. The TPS65800 dynamically adjusts the USB charge rate based on system load to stay within the 100 mA or 500 mA charge rates. In the AC-adapter configuration an external resistor sets the magnitude of the charge current.

The TPS65800 charges the battery in three phases: conditioning, constant current, and constant voltage. Charge is terminated based on minimum current. An internal charge timer provides a backup safety for charge termination. The TPS65800 automatically re-starts the charge if the battery voltage falls below an internal threshold.

The TPS65800 also features an 8-channel (2 external), 10-bit, successive-approximation A/D converter with external trigger capabilities performing single, multiple, and continuous readings; and, returning maximum,minimum, or continuous average values. TPS65800 also has three programmable general purpose input output (GPIO) ports . GPIO3 is programmed by default as a trigger for the A/D converter. Two general purpose PWM drivers and an RGB driver, with programmable current, are also included to provide a highly integrated solution suitable for hand-held and other portable applications.