Overview
The BQ24090DGQR is a highly integrated single-cell Li-ion and Li-Pol linear battery charger from Texas Instruments. This device is designed for space-limited portable applications and operates from either a USB port or an AC adapter. It features a high input voltage range with input overvoltage protection, supporting the use of low-cost unregulated adapters. The charger has a single power output that can charge the battery and also power a system load in parallel, provided the system load does not prevent the battery from charging fully during the 10-hour safety timer. The charging process involves three phases: pre-charge, constant current, and constant voltage, with internal temperature monitoring to adjust the charge current as necessary.
Key Specifications
| Parameter | Value |
|---|---|
| Package | HVSSOP (DGQ) with 10 pins |
| Operating Temperature Range (°C) | 0 to 125 |
| Charge Voltage Accuracy | 1% |
| Charge Current Accuracy | 10% |
| Maximum Input Current Limit | Pin selectable: 100 mA and 500 mA |
| Overvoltage Protection | 6.6 V |
| Thermal Regulation | 125°C thermal regulation; 150°C thermal shutdown protection |
| Short-Circuit Protection | OUT short-circuit protection and ISET short detection |
| Safety Timer | Fixed 10-hour safety timer |
| NTC Thermistor | 10kΩ NTC |
Key Features
- High accuracy current and voltage regulation loops
- Programmable termination and precharge threshold via external resistors
- Programmable fast charge current via an external resistor
- Input voltage dynamic power management
- Operation over JEITA range via battery NTC – ½ fast-charge-current at cold, 4.06 V at hot
- Automatic Termination and Timer Disable Mode (TTDM) for absent battery pack with thermistor
- Status indication – charging/done
- Available in a small 10-pin MSOP package
Applications
The BQ24090DGQR is ideal for space-limited portable applications such as handheld devices, smartphones, tablets, and other battery-powered consumer electronics. It is also suitable for use in devices that require both battery charging and system power from a single input source.
Q & A
- What is the BQ24090DGQR?
The BQ24090DGQR is a highly integrated single-cell Li-ion and Li-Pol linear battery charger from Texas Instruments.
- What are the key features of the BQ24090DGQR?
Key features include high accuracy current and voltage regulation, programmable termination and precharge thresholds, input voltage dynamic power management, and automatic termination and timer disable mode.
- What is the operating temperature range of the BQ24090DGQR?
The operating temperature range is from 0°C to 125°C.
- What type of package does the BQ24090DGQR come in?
The BQ24090DGQR comes in a HVSSOP (DGQ) package with 10 pins.
- What is the maximum input current limit of the BQ24090DGQR?
The maximum input current limit is pin selectable: 100 mA and 500 mA.
- Does the BQ24090DGQR have overvoltage protection?
Yes, it has 6.6 V overvoltage protection.
- How does the BQ24090DGQR handle thermal regulation?
The device has 125°C thermal regulation and 150°C thermal shutdown protection.
- What safety features does the BQ24090DGQR include?
The device includes OUT short-circuit protection, ISET short detection, and a fixed 10-hour safety timer.
- Can the BQ24090DGQR operate with a system load in parallel with the battery?
Yes, as long as the average system load does not prevent the battery from charging fully during the 10-hour safety timer.
- What is the purpose of the TTDM mode in the BQ24090DGQR?
The Automatic Termination and Timer Disable Mode (TTDM) is for absent battery pack with thermistor.
