Overview
The BQ25155YFPR from Texas Instruments is a highly integrated battery charge management IC designed for wearable, portable, and small medical devices. This IC combines a linear battery charger, a regulated output voltage rail for system power, an ADC for battery and system monitoring, an LDO, and a push-button controller. It supports a charge current range of 1.25 mA to 500 mA and features a Power Path that enables quick and accurate charging while providing a regulated voltage to the system. The device is optimized for 5-V USB input and includes advanced power path management, low quiescent current, and programmable parameters via an I2C interface.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Charge Current Range | 1.25 mA to 500 mA | mA |
| Input Voltage Range | 0 to 20 V | V |
| Regulated System Voltage (PMID) | Programmable via I2C | V |
| LDO Output Voltage | 1.8 V | V |
| ADC Resolution | 16 Bits | |
| Package Type | 20-Pin DSBGA | |
| Package Size | 2.00 mm x 1.60 mm | mm |
| Operating Temperature Range | -40°C to 125°C | °C |
| Quiescent Current in Ship Mode | 10 nA | nA |
| I2C Frequency | 100 kHz to 400 kHz | kHz |
Key Features
- Linear battery charger with Power Path for quick and accurate charging.
- Regulated system voltage (PMID) output configurable via I2C.
- 16-bit ADC for battery voltage, thermistor, and system voltage monitoring.
- Always-on 1.8-V LDO supporting loads up to 10 mA.
- Single push-button input for wake and reset functions.
- Programmable input current limit, charge current, and LDO output voltage via I2C.
- Voltage-based JEITA compatible thermistor monitoring for safe temperature charging.
- Low quiescent current for extended battery life.
- TUV IEC 62368 Certification for safety.
Applications
- Headsets, earbuds, and hearing aids.
- Smart watches and smart trackers.
- Wearable fitness and activity monitors.
- Blood glucose monitors.
Q & A
- What is the charge current range of the BQ25155YFPR?
The charge current range is from 1.25 mA to 500 mA. - What is the input voltage tolerance of the BQ25155YFPR?
The input voltage tolerance is up to 20 V. - How is the regulated system voltage (PMID) configured?
The regulated system voltage (PMID) is configurable via the I2C interface. - What is the resolution of the ADC in the BQ25155YFPR?
The ADC resolution is 16 bits. - What is the package type and size of the BQ25155YFPR?
The package type is 20-Pin DSBGA, and the size is 2.00 mm x 1.60 mm. - What are the operating temperature ranges for the BQ25155YFPR?
The operating temperature range is from -40°C to 125°C. - What is the quiescent current in Ship Mode for the BQ25155YFPR?
The quiescent current in Ship Mode is 10 nA. - What is the I2C frequency range supported by the BQ25155YFPR?
The I2C frequency range is from 100 kHz to 400 kHz. - What safety certifications does the BQ25155YFPR have?
The BQ25155YFPR has TUV IEC 62368 Certification. - What are some common applications for the BQ25155YFPR?
Common applications include headsets, earbuds, smart watches, wearable fitness monitors, and blood glucose monitors.
