BQ25570RGRT - English Editing Encyclopedia Entry

Product Overview

Category

The BQ25570RGRT belongs to the category of integrated circuits (ICs) specifically designed for energy harvesting applications.

Use

This IC is primarily used for efficiently extracting and managing energy from ambient sources such as solar panels, thermoelectric generators, or piezoelectric elements. It enables the charging and powering of low-power devices, such as wireless sensor nodes or wearable electronics, by converting and storing harvested energy.

Characteristics

• Low power consumption: The BQ25570RGRT is designed to operate with minimal power requirements, making it suitable for energy-limited environments.
• High efficiency: It incorporates a highly efficient boost converter and maximum power point tracking (MPPT) functionality to optimize energy extraction from the ambient source.
• Ultra-low quiescent current: The IC features an ultra-low quiescent current mode, ensuring minimal power loss during standby periods.
• Integrated protection features: It includes built-in protection mechanisms like overvoltage protection, undervoltage lockout, and thermal shutdown, enhancing system reliability.
• Compact package: The BQ25570RGRT is available in a small 16-pin QFN package, enabling space-efficient integration into various energy harvesting systems.

Packaging/Quantity

The BQ25570RGRT is typically supplied in tape and reel packaging, with a quantity of 2500 units per reel.

Specifications

• Input voltage range: 80mV to 5.5V
• Output voltage range: 2.35V to 5.3V
• Maximum output current: 110mA
• Quiescent current: 330nA (typical)
• Operating temperature range: -40°C to 85°C
• Package type: 16-pin QFN

Detailed Pin Configuration

1. VIN: Input voltage pin
2. GND: Ground reference pin
3. VBAT: Battery output voltage pin
4. VSTOR: Storage capacitor voltage pin
5. EN: Enable pin for controlling the IC's operation
6. STAT: Status indicator pin
7. PG: Power good indicator pin
8. THERM: Thermal shutdown indicator pin
9. VREF: Reference voltage output pin
10. VSS: Negative supply pin
11. VDD: Positive supply pin
12. BATFET: Battery FET control pin
13. LDOIN: Low-dropout regulator input pin
14. LDOOUT: Low-dropout regulator output pin
15. VSTORCTRL: Storage capacitor control pin
16. VSTORSEL: Storage capacitor selection pin

Functional Features

• Energy harvesting optimization: The BQ25570RGRT integrates a boost converter with MPPT functionality to maximize energy extraction from the ambient source.
• Efficient energy storage: It includes an ultra-low power management unit that efficiently charges and stores energy in a connected storage capacitor or battery.
• System protection: Built-in protection features safeguard the IC and the connected devices against overvoltage, undervoltage, and thermal issues.
• Power monitoring: The STAT and PG pins provide status and power good indications, enabling efficient power management and system monitoring.

Advantages and Disadvantages

Advantages

• High energy conversion efficiency
• Ultra-low power consumption
• Compact size for easy integration
• Integrated protection mechanisms enhance system reliability
• Suitable for various energy harvesting applications

Disadvantages

• Limited maximum output current may not be suitable for high-power applications
• Requires external storage capacitor or battery for energy storage

Working Principles

The BQ25570RGRT operates by continuously monitoring the input voltage from the energy harvesting source. It employs MPPT algorithms to track the maximum power point and efficiently extracts energy from the source. The boost converter then steps up the harvested energy to a higher voltage level suitable for charging a connected storage capacitor or battery. The ultra-low quiescent current mode ensures minimal power loss during standby periods, maximizing overall system efficiency.

Detailed Application Field Plans

The BQ25570RGRT finds applications in various fields where energy harvesting is essential. Some potential application areas include:

1. Wireless Sensor Networks: It can power wireless sensor nodes used for environmental monitoring, smart agriculture, or industrial automation.
2. Wearable Electronics: The IC enables efficient energy harvesting for wearable devices like fitness trackers, smartwatches, or medical sensors.
3. Internet of Things (IoT): It can be utilized in IoT devices that require long-term operation without relying on traditional power sources.
4. Remote Monitoring Systems: The IC can power remote monitoring systems for infrastructure, weather stations, or wildlife tracking, eliminating the need for frequent battery replacements.

Detailed and Complete Alternative Models

1. BQ25504: A similar IC from Texas Instruments with lower input voltage range but higher output current capability.
2. LTC