Overview
The BQ298000RUGR, part of the BQ298xyz family, is a high-side single-cell protector designed by Texas Instruments. This device is specifically engineered to enhance the thermal performance of battery protection systems, particularly for 1-series Li-ion and Li-polymer batteries. It features integrated charge-pump FET drivers, which help in reducing power dissipation across the protection FETs by providing higher Vgs to the FET gate voltage, thus lowering the FET Rdson. This design allows for the use of a sense resistor as low as 1mΩ, resulting in lower heat dissipation without compromising current accuracy.
Key Specifications
| Parameter | Description | Typical Value | Min/Max Value | Unit |
|---|---|---|---|---|
| Overvoltage (OV) Range | Factory configured | 3750 - 5200 | 50 mV step | mV |
| Undervoltage (UV) Range | Factory configured | 2200 - 3000 | 50 mV step | mV |
| Overcurrent in Charge (OCC) Range | Factory configured | -64 to -4 | 2 mV step | mV |
| Overcurrent in Discharge (OCD) Range | Factory configured | 4 to 64 | 2 mV step | mV |
| Short Circuit Discharge (SCD) Detection Delay | Fixed configuration | 125, 250, 375 | µs | |
| Internal Overtemperature Threshold | Factory configured | 75, 85 | °C | |
| Package | X2QFN | 1.50mm × 1.50mm × 0.37mm | ||
| VDD Supply Voltage | 3.6 V | 3 to 5 V | V |
Key Features
- Voltage Protection: The device offers overvoltage (OV) and undervoltage (UV) protection with high accuracy, ensuring the battery operates within safe voltage limits.
- Current Protection: It includes overcurrent in charge (OCC) and discharge (OCD) protection, as well as short circuit discharge (SCD) detection.
- Temperature Protection: The BQ298000RUGR features internal overtemperature protection and the option to connect an external Positive Temperature Coefficient (PTC) thermistor for additional overtemperature protection.
- Zero-Volt Charging: The BQ2980xy devices support zero-volt charging, although this feature is disabled in the BQ2982xy devices.
- CTR Pin Configurability: The CTR pin can be configured for system reset, shutdown, or to connect an external PTC for overtemperature protection.
- Low Power Dissipation: The device is designed to reduce power dissipation across the protection FETs by using a charge pump to provide higher Vgs to the FET gate voltage.
Applications
The BQ298000RUGR is suitable for a variety of applications requiring high-side primary battery cell protection, including:
- Lithium-Ion and Lithium-Polymer Batteries: It is specifically designed for 1-series Li-ion and Li-polymer batteries.
- Portable Electronics: Ideal for use in portable devices such as smartphones, tablets, and laptops.
- Industrial and Automotive Systems: Can be used in industrial and automotive applications where reliable battery protection is crucial.
- Consumer Electronics: Suitable for various consumer electronics that require robust battery protection.
Q & A
- What is the primary function of the BQ298000RUGR?
The primary function of the BQ298000RUGR is to provide high-side primary battery cell protection for 1-series Li-ion and Li-polymer batteries.
- What types of voltage protection does the BQ298000RUGR offer?
The device offers overvoltage (OV) and undervoltage (UV) protection.
- How does the BQ298000RUGR reduce power dissipation?
The device reduces power dissipation by using a charge pump to provide higher Vgs to the FET gate voltage, thus lowering the FET Rdson.
- What is the role of the CTR pin in the BQ298000RUGR?
The CTR pin can be configured for system reset, shutdown, or to connect an external PTC for overtemperature protection.
- Does the BQ298000RUGR support zero-volt charging?
The BQ2980xy devices support zero-volt charging, but this feature is disabled in the BQ2982xy devices.
- What is the package type and dimensions of the BQ298000RUGR?
The package type is X2QFN, with dimensions of 1.50mm × 1.50mm × 0.37mm.
- What is the typical supply voltage for the BQ298000RUGR?
The typical supply voltage is 3.6 V, with a range of 3 to 5 V.
- How does the BQ298000RUGR protect against overtemperature conditions?
The device features internal overtemperature protection and the option to connect an external PTC thermistor for additional protection.
- What are some common applications for the BQ298000RUGR?
Common applications include portable electronics, industrial and automotive systems, and various consumer electronics.
- Can the BQ298000RUGR be customized by the customer?
No, the devices are preprogrammed by Texas Instruments and are not intended to be further customized by the customer.
