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Product Information
Features
BATTERY CHARGER
Complete charge management solution for single Li-Ion/Li-Pol cell with thermal foldback, dynamic power management and pack temperature sensing, supporting up to 1.5-A max charge current
Programmable charge parameters for AC adapter and USB port operation
INTEGRATED POWER SUPPLIES
A total of 9 LDOs are integrated:
Six adjustable output LDOs (1.25-V to 3.3-V)
Two fixed-voltage LDOs (3.3-V)
One fixed-voltage, always-on LDO (3.3-V)
One RTC backup supply with low leakage (3.1-V)
Two 600-mA output current, 0.6-V to 3.4-V programmable dc/dc buck converters with enable, standby mode operation, and automatic low-power mode setting
DISPLAY FUNCTIONS
Two open-drain PWM outputs with programmable frequency and duty cycle. Can be used to control keyboard backlight, vibrator, or other external peripheral functions
RGB LED driver with programmable flashing period and individual R/G/B brightness control
Constant-current white LED driver, with programmable current level, brightness control, and overvoltage protection can drive up to 6 LEDs in series configuration
SYSTEM MANAGEMENT
Dual input power path function with input current limiting and OVP protection
POR function with programmable masking monitors all integrated supplies outputs
Software and hardware reset functions
8-channel integrated A/D samples system parameters with single conversion, peak detection, or averaging operating modes
HOST INTERFACE
Host can set system parameters and access system status using I2C interface
Interrupt function with programmable masking signals system status modifiction to host
3 GPIO ports, programmable as drivers, integrated A/D trigger or buck converters standby mode control
APPLICATIONS
PDAs
Smart Phones
MP3s
Internet Appliances
Handheld Devices
Description
The TPS65820 provides an easy to use, fully integrated solution for handheld devices, integrating charge management, multiple regulated power supplies, system management and display functions, in a small thermally-enhanced 7-mm × 7-mm package. The high level of integration enables typical board area space savings of 70% when compared to equivalent discrete solutions, while implementing a high-performance and flexible solution, portable across multiple platforms. If required, an external host may control the TPS65820 via I2C interface, with access to all integrated systems. The I2C enables setting output voltages, current thresholds, and operation modes. Internal registers have a complete set of status information, enabling easy diagnostics, and host-controlled handling of fault conditions. The TPS65820 can operate in stand-alone mode, with no external host control, if the internal power-up defaults are compatible with the system requirements
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