BQ25505 Datasheet, PDF (1/34 Pages) Texas Instruments – Ultra Low Power Boost Charger with Battery Management and Autonomous Power

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bq25505
SLUSBJ3B – AUGUST 2013 – REVISED JANUARY 2014
Ultra Low Power Boost Charger with Battery Management and Autonomous Power
Multiplexor for Primary Battery in Energy Harvester Applications
Check for Samples: bq25505
FEATURES
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• Ultra Low Power With High Efficiency DC/DC
Boost Charger
– Cold-Start Voltage: V_IN ≥ 330 mV
– Continuous Energy Harvesting From Input
Sources as low as 100 mV
– Ultra Low Quiescent Current of 325 nA
– Input Voltage Regulation Prevents
Collapsing High Impedance Input Sources
– Ship Mode with < 5 nA From Battery
• Energy Storage
– Energy can be Stored to Re-Chargeable Li-
ion Batteries, Thin-film Batteries, Super-
Capacitors, or Conventional Capacitors
• Battery Charging and Protection
– Internally Set Undervoltage Level
– User Programmable Overvoltage Level
• Battery Good Output Flag
– Programmable Threshold and Hysteresis
– Warn Attached Microcontrollers of Pending
Loss of Power
– Can be Used to Enable/Disable System
Loads
• Programmable Maximum Power Point Tracking
(MPPT)
– Integrated MPPT for optimal energy
extraction from a variety of energy
harvesters
• Gate Drivers for Primary (Non-rechargeable)
and Secondary (rechargeable) Storage
Element Multiplexing
– Autonomous switching based on VBAT_OK
– Break-before-make prevents system rail
droop
APPLICATIONS
• Energy Harvesting
• Solar Charger
• Thermal Electric Generator (TEG) Harvesting
• Wireless Sensor Networks (WSN)
• Industrial Monitoring
• Environmental Monitoring
• Bridge and Structural Health Monitoring (SHM)
• Smart Building Controls
• Portable and Wearable Health Devices
• Entertainment System Remote Controls
DESCRIPTION
The bq25505 is the first of a new family of intelligent integrated energy harvesting Nano-Power management
solutions that are well suited for meeting the special needs of ultra low power applications. The product is
specifically designed to efficiently acquire and manage the microwatts (µW) to miliwatts (mW) of power
generated from a variety of DC sources like photovoltaic (solar) or thermal electric generators (TEGs). The
bq25505 is a highly efficient boost charger targeted toward products and systems, such as wireless sensor
networks (WSN) which have stringent power and operational demands. The design of the bq25505 starts with a
DCDC boost charger that requires only microwatts of power to begin operating.
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Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
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