说明
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.
特性
- 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
