Overview
The BQ24179YBGR is a fully integrated switch-mode buck-boost battery charger designed by Texas Instruments. This component is specifically tailored for charging 1- to 4-cell Li-ion and Li-polymer batteries. It features high power density and integration, making it suitable for a wide range of applications that require efficient battery management. The charger supports any USB PD 3.0 profile and can handle input sources ranging from legacy USB adapters to high-voltage USB PD adapters and traditional barrel adapters.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Package | DSBGA (YBG) | - |
| Pins | 56 | - |
| Operating Temperature Range | -40 to 85 | °C |
| Charging Current | Up to 5 A | A |
| Input Voltage Range | 3.6 to 24 V | V |
| Absolute Maximum Input Voltage | 30 V | V |
| Switching Frequencies | 750 kHz or 1.5 MHz | - |
| Efficiency | Up to 96.5% (2s battery, 9 V input, 3 A ICHG) | % |
| Junction Temperature Range | -40 to 125 | °C |
Key Features
- High power density and high integration buck-boost charger for 1- to 4-cell batteries.
- Supports any USB PD 3.0 profile.
- Integrates four switching MOSFETs and the battery FET (QBAT).
- Input and charging current sensing circuits.
- High efficiency with up to 96.5% efficiency for 2s battery charging.
- Dual-input power mux controller (optional) for source selection.
- Narrow voltage DC (NVDC) power path management.
- Flexible autonomous and I2C mode for optimal system performance.
- Integrated 16-bit ADC for voltage, current, and temperature monitoring.
- Low battery quiescent current (typical 30-µA for battery only operation).
- High accuracy with ±1% charge voltage regulation and ±10% charge current regulation.
- Safety features include thermal regulation, thermal shutdown, input/battery OVP and OCP, and charging safety timer.
Applications
- Cordless vacuum cleaners
- Medical equipment
- Drones
- Wireless speakers
- Digital cameras
- Mobile printers
- Electronic point of sales (EPOS) systems
Q & A
- What is the BQ24179YBGR used for?
The BQ24179YBGR is a fully integrated switch-mode buck-boost battery charger for 1- to 4-cell Li-ion and Li-polymer batteries.
- What is the input voltage range of the BQ24179YBGR?
The input voltage range is from 3.6 V to 24 V, with an absolute maximum rating of 30 V.
- What are the switching frequencies of the BQ24179YBGR?
The switching frequencies are 750 kHz or 1.5 MHz.
- What is the maximum charging current of the BQ24179YBGR?
The maximum charging current is up to 5 A.
- Does the BQ24179YBGR support USB PD 3.0 profiles?
Yes, it supports any USB PD 3.0 profile.
- What safety features does the BQ24179YBGR include?
The device includes thermal regulation, thermal shutdown, input/battery OVP and OCP, and a charging safety timer.
- How does the BQ24179YBGR manage power when the input source is insufficient?
The device uses NVDC power path management, which regulates the system voltage slightly above the battery voltage and prevents the system from crashing by supplementing power from the battery when necessary.
- What is the package type and size of the BQ24179YBGR?
The package type is DSBGA (YBG) with 56 pins, and the package size is 2.9 mm × 3.3 mm.
- Does the BQ24179YBGR have integrated current sensing?
Yes, it integrates input and charging current sensing circuits.
- What is the quiescent current of the BQ24179YBGR in battery-only operation?
The typical quiescent current is 30 µA for battery-only operation.
