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Name: BQ21040DBVR
Brand: Texas Instruments
SKU: BQ21040DBVR
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

Any Feature, including a modified Existing Feature, that is not an Existing Feature.

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Texas Instruments BQ21040DBVR

Part No.:: BQ21040DBVR

Manufacturer:: Texas Instruments

Package:: SOT-23-6

Datasheet:: BQ21040DBVR.pdf

Description:: IC BATT CHG LI-ION 1CELL SOT23-6

In Stock:: 3745

Quantity:: Add To Cart

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BQ21040DBVR this integrated circuit is available in factory sealed anti static packs. at icwhale.com. Please read product page below detail information. including BQ21040DBVR price, data-sheet, in-stock availability, technical difficulties. Also. Quickly Enter the access of compare listing to find out replaceable electronic parts. If you want to retrieve comprehensive data for BQ21040DBVR to optimize the supply chain (including cross references, life-cycle, parametric, counterfeit risk, obsolescence managements forecasts), please contact to our Tech-supports team.

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BQ21040DBVR Typical application Circuitry

BQ21040DBVR

The BQ21040DBVR is a single-cell lithium-ion battery charger IC developed by Texas Instruments. With features like automated recharging, current control, and temperature monitoring, it is made to effectively manage the charging process. This integrated circuit is especially well-suited for space-constrained portable applications, such those found in wearable technology, Bluetooth headsets, and other compact consumer electronics. BQ21040DBVR: Functional Capabilities and Application Scenarios

Typical Applications

- Wearable Devices: Used for efficient charging of lithium-ion batteries in smartwatches and fitness trackers.

- Bluetooth Headsets: Integrated for reliable battery management and charging.

- Portable Consumer Electronics: Employed in devices like wireless mice and small medical devices for safe charging.

Key Specifications

- Single-Cell Lithium-Ion Charger: Tailored for charging single-cell lithium-ion batteries.

- Compact SOT-23 Package: Ideal for space-constrained applications.

- Integrated PowerFET and Current Sensor: Simplifies the circuit design with internal components.

- Charge Status Output: Provides real-time information about the charging process.

Circuit Integration: BQ21040DBVR in a Bluetooth Headset

1. Power Supply and Battery Connection

- VIN (Pin 1): Connect to a 5V power supply, typically through a USB charging port.

- BAT (Pin 2): Connect to the positive terminal of the lithium-ion battery.

2. Ground Connection

- GND (Pin 3): Connect to the common ground of the headset's circuit.

3. Charge Control and Monitoring

- CE/STAT (Pin 4): Connect to a GPIO pin on the headset's microcontroller. This pin serves both as a charge enable input and a charge status output.

4. Programmable Charge Current

- PROG (Pin 5): Attach a resistor to this pin to set the charging current according to the battery's specification.

Design Considerations

- Stable Power Source: Ensure a consistent power supply within the recommended voltage range for the IC.

- Accurate Charge Current Setting: Select the appropriate resistor value for PROG to achieve the desired charging current.

- Temperature Monitoring: If the device is susceptible to heating, consider adding a temperature sensing mechanism.

- Charge Enable and Status Function: Implement proper control logic for CE/STAT to manage charging and monitor status effectively.

- Safety precautions: It is advised to include safeguards against overvoltage, short circuit, and overheating.

- Thermal Management: In particular, if the charging current is strong, make sure that sufficient heat is dispersed.

- PCB Layout: Make sure the connections are both electrically and physically stable and limit noise on the PCB.

- Component Quality and Reliability: Use high-quality components to enhance the overall safety and longevity of the charging system.

When integrating the BQ21040DBVR into a Bluetooth headset, these considerations are crucial for creating an efficient, safe, and reliable charging system. For comprehensive specifications, including pin layout and electrical parameters, refer to the BQ21040DBVR's datasheet and technical documentation.

BQ21040DBVR information

BQ21040DBVR Specifications

Packaging:
Tape & Reel (TR),Cut Tape (CT),Digi-Reel®
Series:
-
ProductStatus:
Active
BatteryChemistry:
Lithium Ion/Polymer
NumberofCells:
1
Current-Charging:
Constant - Programmable
ProgrammableFeatures:
-
FaultProtection:
Over Temperature, Over Voltage, Short Circuit
ChargeCurrent-Max:
800mA
BatteryPackVoltage:
4.2V
Voltage-Supply(Max):
6.45V
Interface:
USB
OperatingTemperature:
0°C ~ 125°C (TJ)
MountingType:
Surface Mount

BQ21040DBVR FAQ

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6. What is the process for return or replacement of BQ21040DBVR?

All goods will implement Pre-Shipment Inspection (PSI), selected at random from all batches of your order to do a systematic inspection before arranging the shipment. If there is something wrong with the BQ21040DBVR we delivered, we will accept the replacement or return of the BQ21040DBVR only when all of the below conditions are fulfilled:

(1)Such as a deficiency in quantity, delivery of wrong items, and apparent external defects (breakage and rust, etc.), and we acknowledge such problems.

(2)We are informed of the defect described above within 90 days after the delivery of BQ21040DBVR.

(3)The PartNo is unused and only in the original unpacked packaging.

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(1)Inform us within 90 days

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