BQ21040DBVR

The BQ21040DBVR is a highly efficient single-cell lithium-ion and lithium-polymer battery charge management IC developed by Texas Instruments. It is designed for compact and portable applications, offering a linear charging solution with minimal external components. The device supports a wide input voltage range, making it suitable for USB and adapter charging sources. It features a programmable pre-charge and fast-charge current, as well as termination current, via external resistors.
The BQ21040DBVR provides enhanced safety features, including over-voltage, over-current, and thermal protection. The IC offers a low-dropout regulator for stable output voltage, even with varying input conditions. Its thermal regulation and dynamic power management optimize the charging cycle, ensuring efficiency and battery longevity. The device operates in two modes: a standard charge mode and a low-power sleep mode, which reduces power consumption when the input is removed.
Its small footprint, typically a 5-pin SOT-23 package, enhances its suitability for space-constrained applications such as wearable devices, medical equipment, and IoT devices. Overall, the BQ21040DBVR is a versatile and reliable choice for single-cell battery charging needs.

The BQ21040DBVR is a linear battery charger designed for single-cell lithium-ion or lithium-polymer batteries. Key features include:
1. Input Voltage Range: It supports an input voltage range of 4.5V to 6.5V, making it compatible with various power sources.
2. Charge Current: The charger offers a programmable fast charge current, typically up to 800 mA, suitable for a wide range of battery capacities.
3. Thermal Regulation: It incorporates thermal regulation to ensure safe charging by reducing the charge current when the device temperature exceeds a set limit.
4. Battery Voltage Regulation: The device regulates the battery voltage to a typical 4.2V to ensure full capacity without overcharging.
5. Charge Termination: It features automatic charge termination based on minimum current, enhancing battery life and safety.
6. Status Indicator: The BQ21040DBVR includes status indication pins for charging and fault conditions.
7. Small Package: Available in a small SOT-23-6 package, it's ideal for space-constrained applications.
8. Protections: It provides overvoltage, short-circuit, and thermal protection to enhance reliability.
These features make the BQ21040DBVR suitable for portable devices, wearables, and other applications requiring efficient battery management.

The BQ21040DBVR is packaged in a small-outline transistor (SOT) 23-6 format. This package type features six pins and is commonly used for compact and efficient battery management applications.

The BQ21040DBVR is a single-cell Li-Ion and Li-Pol linear battery charger from Texas Instruments. It comes in a 5-pin SOT-23-5 package. Here is a brief overview of its pin configuration and functions:
1. VSS (Pin 1): Ground pin for the device.
2. BAT (Pin 2): Battery connection pin; it connects directly to the battery and manages charging.
3. VOUT (Pin 3): Output pin that provides the regulated output voltage.
4. CE (Pin 4): Charge enable pin; it is used to enable or disable charging. Active low.
5. VIN (Pin 5): Input voltage pin; it connects to the external power source for charging.
The BQ21040DBVR is designed for space-limited and portable applications, providing a simple and efficient solution for battery charging with features like thermal regulation, pre-charge, and fast-charge modes.

The manufacturer of the BQ21040DBVR is Texas Instruments. Texas Instruments is a global semiconductor company that designs and manufactures a wide range of electronic components, including integrated circuits for analog and digital signal processing, power management, microcontrollers, and more. The company serves various industries, including automotive, industrial, consumer electronics, communications, and enterprise systems. Known for its innovation and technological advancements, Texas Instruments is a leader in the semiconductor industry.

The BQ21040DBVR is a linear battery charger IC designed for single-cell lithium-ion and lithium-polymer batteries. Its application areas include portable electronics, wearable devices, fitness trackers, smartphones, and other compact consumer electronics requiring efficient battery management. It is particularly suited for devices with limited space and power requirements, offering features like USB compatibility, thermal regulation, and precise charge termination.

The BQ21040DBVR is a linear battery charger IC from Texas Instruments. Equivalent products from other manufacturers include the MCP73831 from Microchip Technology, the TP4056 from NanJing Top Power ASIC Corp, and the MAX1811 from Maxim Integrated. These alternatives offer similar functionalities for charging single-cell lithium-ion and lithium-polymer batteries. Always check the specific datasheets to ensure compatibility with your application requirements.