Overview
The BQ21040DBVR by Texas Instruments is a highly integrated 1-cell, 0.8-A lithium-ion and lithium-polymer battery charger. It is designed for space-limited portable applications and comes in a compact SOT-23 package with six pins. The device operates within a temperature range of 0 to 125°C, making it suitable for a wide range of electronic devices. It supports charging from either a USB port or an AC adapter and features advanced protection mechanisms and status indications.
Key Specifications
| Attribute | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package Type | SOT-23 (DBV) |
| Number of Pins | 6 |
| Min Supply Voltage | 3.5V |
| Max Supply Voltage | 28V |
| Number of Cells | 1 |
| Output Current | 800mA |
| Max Junction Temperature (Tj) | 125°C |
| Max Operating Temperature | 125°C |
| Min Operating Temperature | 0°C |
| Height | 1.45mm |
| Length | 2.9mm |
| Width | 1.6mm |
| Lead Free | Yes |
| RoHS Compliant | Yes |
Key Features
- 1% Charge Voltage Accuracy and 10% Charge Current Accuracy.
- Programmable Charge Current using External Resistor up to 800 mA.
- Low Battery Leakage Current (1 µA).
- 30-V Input Rating with 6.6-V Input Overvoltage Protection.
- Input Voltage Dynamic Power Management.
- 125°C Thermal Regulation and 150°C Thermal Shutdown Protection.
- OUT Short-Circuit Protection and ISET Short Detection.
- Overtemperature Sensing Protection Through NTC.
- Fixed 10-Hour Safety Timer.
- Status Indication – Charging/Done.
Applications
The BQ21040DBVR is suitable for various portable electronic applications due to its compact size and robust features. Potential industry applications include:
- Smartphones and mobile devices.
- Portable media players and audio devices.
- Wearable technology such as smartwatches and fitness trackers.
- Handheld gaming devices and other battery-powered gadgets.
Q & A
- What is the BQ21040DBVR? The BQ21040DBVR is a 1-cell, 0.8-A lithium-ion and lithium-polymer battery charger produced by Texas Instruments.
- What package type does the BQ21040DBVR come in? It comes in a SOT-23 (DBV) package with six pins.
- What is the operating temperature range of the BQ21040DBVR? The operating temperature range is from 0 to 125°C.
- What is the maximum output current of the BQ21040DBVR? The maximum output current is 800 mA.
- Does the BQ21040DBVR have overvoltage protection? Yes, it has a 6.6-V input overvoltage protection.
- Is the BQ21040DBVR RoHS compliant? Yes, it is RoHS compliant and lead-free.
- What is the purpose of the 10-hour safety timer in the BQ21040DBVR? The 10-hour safety timer ensures that the battery is not overcharged and prevents potential safety issues.
- How does the BQ21040DBVR manage thermal regulation? It has 125°C thermal regulation and 150°C thermal shutdown protection.
- Can the charge current of the BQ21040DBVR be programmed? Yes, the charge current can be programmed using an external resistor up to 800 mA.
- What types of batteries does the BQ21040DBVR support? It supports 1-cell lithium-ion and lithium-polymer batteries.
