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BQ25570

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Ultra Low power Harvester power Management IC with boost charger, and Nanopower Buck Converter

Data sheet
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Ultra Low power Harvester power Management IC with boost charger, and Nanopower Buck Converter

BQ25570

ACTIVE
Data sheet Order now

Product details

Parameters

Number of series cells 1 Charge current (Max) (A) 0.1 Operating Vin (Max) (V) 5.1 Cell chemistry Li-Ion/Li-Polymer, SuperCap Battery charge voltage (Min) (V) 2.2 Battery charge voltage (Max) (V) 5.5 Absolute Vin (safety rating) (Max) ((V)) 5.5 Control topology Switch-Mode Boost Control interface Standalone (RC-Settable) Features Input OVP, Solar input/MPPT Operating Vin (Min) (V) 0.6 Rating Catalog open-in-new Find other Battery charger ICs

Package | Pins | Size

VQFN (RGR) 20 12 mm² 3.5 x 3.5 open-in-new Find other Battery charger ICs

Features

  • Ultra Low Power DC-DC Boost Charger
    • Cold-Start Voltage: VIN ≥ 600 mV
    • Continuous Energy Harvesting From VIN as low as 100 mV
    • Input Voltage Regulation Prevents Collapsing High Impedance Input Sources
    • Full Operating Quiescent Current of 488 nA (typical)
    • 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 Levels
  • Battery Good Output Flag
    • Programmable Threshold and Hysteresis
    • Warn Attached Microcontrollers of Pending Loss of Power
    • Can be Used to Enable or Disable System Loads
  • Programmable Step Down Regulated Output (Buck)
    • High Efficiency up to 93%
    • Supports Peak Output Current up to 110 mA (typical)
  • Programmable Maximum Power Point Tracking (MPPT)
    • Provides Optimal Energy Extraction From a Variety of Energy Harvesters including Solar Panels, Thermal and Piezo Electric Generators

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Description

The bq25570 device is specifically designed to efficiently extract microwatts (µW) to milliwatts (mW) of power generated from a variety of high output impedance DC sources like photovoltaic (solar) or thermal electric generators (TEG) without collapsing those sources. The battery management features ensure that a rechargeable battery is not overcharged by this extracted power, with voltage boosted, or depleted beyond safe limits by a system load. In addition to the highly efficient boosting charger, the bq25570 integrates a highly efficient, nano- power buck converter for providing a second power rail to systems such as wireless sensor networks (WSN) which have stringent power and operational demands. All the capabilities of bq25570 are packed into a small foot-print 20-lead 3.5-mm x 3.5-mm QFN package (RGR).

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Technical documentation

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Type Title Date
* Datasheet bq25570 nano power boost charger and buck converter for energy harvester powered applications datasheet (Rev. G) Mar. 06, 2019
Technical article When to use rechargeable batteries in small battery applications Oct. 01, 2019
Technical article How energy harvesting can extend the life of your fault indicator on the grid Oct. 18, 2017
White paper Cities grow smarter through innovative semiconductor technologies Jul. 07, 2017
Technical article Trends in building automation: predictive maintenance Nov. 01, 2016
Technical article Let’s harvest that energy with MSP430™ FRAM microcontrollers Feb. 24, 2016
User guide User's Guide for bq25570 Battery Charger Evaluation Module for Energy Harvesting (Rev. A) Aug. 23, 2014
More literature Battery Management Solutions for Wearable and Fitness Devices (Rev. C) Aug. 18, 2014
Application note Accurately measuring efficiency of ultralow-IQ devices Jan. 22, 2014
More literature Industry’s Most Efficient Nano Power Harvesting Solutions (Rev. A) Nov. 08, 2013

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Hardware development

EVALUATION BOARD Download
document-generic User guide
99
Description

The bq25570 evaluation module (EVM) is a complete module for evaluating the bq25570 energy harvesting charger for storage elements like single-cell Li-Ion/Polymer batteries or super-capacitors. Intended to be powered by high impedance supplies, such as solar panels, thermo-electric generators (TEGs (...)

Features
  • Programmable input voltage regulation setting via jumpers or resistors
  • Programmable charger output voltage maximum setting via resistors (currently 4.2V)
  • Programmable charger output voltage maximum setting via resistors (currently 1.8V)
  • Programmable power good (BAT_OK) voltage setting via resistors (...)
View details

Software development

CODE EXAMPLE OR DEMO Download
SLUC461A.ZIP (31 KB)

Design tools & simulation

CALCULATION TOOL Download
SLUC484.ZIP (284 KB)

Reference designs

REFERENCE DESIGNS Download
4-mA to 20-mA Loop Energy Harvester Reference Design
TIDA-00649 — The TIDA-00649 reference design demonstrates energy harvesting from 4-mA to 20-mA loop-powered systems. The design is simple to insert into existing installations where it scavenges energy from the loop and generates a regulated output voltage. Furthermore, the circuit provides an analog output (...)
document-generic Schematic document-generic User guide
REFERENCE DESIGNS Download
Generic Energy Harvesting Adapter Module for Thermoelectric Generators (TEG) Reference Design
TIDA-00246 — This reference design aims at providing a generic solution for energy harvesting while giving a practical application application for thermoelectric generators (TEG). It is a fully programmable state-machine which runs at 60nA and can enable and disable key functions as they are needed by the system (...)
document-generic Schematic document-generic User guide
REFERENCE DESIGNS Download
Energy Harvesting LaunchPad BoosterPack for Brushed DC Motor Control Reference Design
TIDA-00616 — The Energy Harvesting LaunchPad for Brushed DC Motor Control is designed for charging a Li-ion or Li-polymer battery with solar energy, and subsequently using a voltage regulator to provide secondary system power to a TI LaunchPad and any peripherals connected the LaunchPad. The BoosterPack is (...)
document-generic Schematic document-generic User guide
REFERENCE DESIGNS Download
Energy Harvester Booster Pack Reference Design
TIDA-00588 — The TIDA-00588 reference design is a BoosterPack that harvests energy from a wide variety of current sources or from the onboard solar cells to power any low-power TI LaunchPad. This design is a highly integrated power management solution that is well-suited for ultra-low power applications.

There (...)
document-generic Schematic document-generic User guide
REFERENCE DESIGNS Download
Wireless Motor Monitor Reference Design
TIDM-WLMOTORMONITOR — This TI Design is inspired by the need to monitor the health of motors and machines to accurately predict and schedule maintenance (or replacement) while minimizing cost and down time during industrial production. Millions of industrial motors are monitored today with handheld or wired Piezo (...)
document-generic Schematic document-generic User guide
REFERENCE DESIGNS Download
Solar Power Energy Harvester Reference Design Using a Super Cap
TIDA-00242 — This reference design is a solar charger and energy harvester using a highly integrated power management solution that is well-suited for ultra-low power applications. The product is specifically designed to efficiently acquire and manage the microwatts (μW) to milliwatts (mW) needed to (...)
document-generic Schematic document-generic User guide

CAD/CAE symbols

Package Pins Download
VQFN (RGR) 20 View options

Ordering & quality

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  • Ongoing reliability monitoring

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