Overview
The BQ25050DQCR from Texas Instruments is a highly integrated single-cell Li-Ion battery charger designed for space-limited portable applications. It operates from either a USB port or an AC adapter and supports up to 1A of charge current. The charger features a 30V input voltage range with over-voltage protection, making it compatible with low-cost unregulated adapters. The device includes a single power output that charges the battery and maintains a minimum system output voltage, allowing the system to start-up and run even when the battery voltage is low.
Key Specifications
| Parameter | Value | Units |
|---|---|---|
| Input Voltage Range | 0V to 30V | V |
| Input Over-Voltage Protection (OVP) | 10.5V | V |
| Charge Current | Up to 1A | A |
| Battery Voltage Regulation Accuracy | 0.5% | % |
| Charge Current Regulation Accuracy | 7% | % |
| Integrated Low Dropout Linear Regulator (LDO) | 4.9V, 50mA | V, mA |
| Thermal Regulation and Protection | Yes | |
| Battery NTC Monitoring | During Charge and Discharge | |
| Package Type | 10 Pin SON, 2mm × 3mm |
Key Features
- Programmable charge current up to 1A using the CTRL input.
- Integrated 4.9V, 50mA LDO for supplying low power external circuitry.
- External Power Path Control feature using the BGATE output to manage power distribution between the battery and system load.
- Thermal regulation and protection to prevent overheating.
- Battery NTC monitoring during charge and discharge.
- Status indication for charging/done and temperature faults.
- Low-battery system startup circuitry maintains OUT pin voltage above 3.4V when an input source is connected.
Applications
- Smart Phones
- Mobile Phones
- Portable Media Players
- Low Power Handheld Devices
Q & A
- What is the input voltage range of the BQ25050DQCR?
The input voltage range is from 0V to 30V with over-voltage protection up to 10.5V.
- What is the maximum charge current supported by the BQ25050DQCR?
The maximum charge current is up to 1A.
- Does the BQ25050DQCR have an integrated LDO?
Yes, it includes a 4.9V, 50mA LDO.
- How does the External Power Path Control feature work?
The feature is implemented using the BGATE output to control an external P-channel MOSFET, connecting the battery to the system output based on battery voltage and IC status.
- What are the different charging modes of the BQ25050DQCR?
The charger operates in precharge, minimum output regulation, and constant current/constant voltage (CC/CV) modes.
- How does the thermal regulation and protection work?
The device reduces the charge current if the internal temperature exceeds a threshold to prevent overheating.
- What is the purpose of the low-battery system startup circuitry?
The circuitry maintains the OUT pin voltage above 3.4V when an input source is connected, allowing the system to start-up and run even with a low battery voltage.
- What kind of battery does the BQ25050DQCR support?
The BQ25050DQCR supports single-cell Li-Ion batteries.
- How is the charge current programmed?
The charge current is programmable up to 1A using the CTRL input.
- What is the package type of the BQ25050DQCR?
The package type is a 10 Pin SON, 2mm × 3mm.
