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BQ25505 Datasheet(PDF) 1 Page - Texas Instruments |
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BQ25505 Datasheet(HTML) 1 Page - Texas Instruments |
1 / 34 page bq25505 www.ti.com 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 1 FEATURES • Ultra Low Power With High Efficiency DC/DC – Integrated MPPT for optimal energy Boost Charger extraction from a variety of energy harvesters – Cold-Start Voltage: VIN ≥ 330 mV • Gate Drivers for Primary (Non-rechargeable) – Continuous Energy Harvesting From Input and Secondary (rechargeable) Storage Sources as low as 100 mV Element Multiplexing – Ultra Low Quiescent Current of 325 nA – Autonomous switching based on VBAT_OK – Input Voltage Regulation Prevents – Break-before-make prevents system rail Collapsing High Impedance Input Sources droop – Ship Mode with < 5 nA From Battery • Energy Storage APPLICATIONS – Energy can be Stored to Re-Chargeable Li- • Energy Harvesting ion Batteries, Thin-film Batteries, Super- • Solar Charger Capacitors, or Conventional Capacitors • Thermal Electric Generator (TEG) Harvesting • Battery Charging and Protection • Wireless Sensor Networks (WSN) – Internally Set Undervoltage Level • Industrial Monitoring – User Programmable Overvoltage Level • Environmental Monitoring • Battery Good Output Flag • Bridge and Structural Health Monitoring (SHM) – Programmable Threshold and Hysteresis • Smart Building Controls – Warn Attached Microcontrollers of Pending • Portable and Wearable Health Devices Loss of Power • Entertainment System Remote Controls – Can be Used to Enable/Disable System Loads • Programmable Maximum Power Point Tracking (MPPT) 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. 1 Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet. PRODUCTION DATA information is current as of publication date. Copyright © 2013–2014, Texas Instruments Incorporated 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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