BQ21040DBVR
Battery Chargers
Technical Specifications
| Type | Description |
|---|---|
| Working Voltage V | 15.75 V |
| Interface | - |
| Iq A | 0 A |
| End-Off Voltage | - |
| Number of Cells | 1 |
| Battery Temperature Detection | Support |
| 0V Battery Charge | - |
| Type of Battery | Lithium Battery |
| Type | Description |
|---|---|
| The Chip Type | Charging IC |
| Balance Current | - |
| Charge Current - Max | 800mA |
| Charging Saturation Voltage | 4.2V |
| Operating Temp | 0°C ~ +125°C |
| Features | Constant current charging;Constant voltage charging;Trickle charging;Automatic recharge;Charge termination;Programmable charging current;Overcurrent Protection;Short-Circuit Protection;Overvoltage protection;Under-voltage lockout |
| Package / Case | SOT-23-6 |
Product Introduction
The bq21040 device is a highly integrated Li-Ion and Li-Pol linear battery charger device targeted at space-limited portable applications. The device operates from either a USB port or AC adapter. The high input voltage range with input overvoltage protection supports low-cost unregulated adapters.
The bq21040 has a single power output that charges the battery. A system load can be placed in parallel with the battery as long as the average system load does not keep the battery from charging fully during the 10 hour safety timer.
The battery is charged in three phases: conditioning, constant current and constant voltage. In all charge phases, an internal control loop monitors the IC junction temperature and reduces the charge current if an internal temperature threshold is exceeded.
The charger power stage and charge current sense functions are fully integrated. The charger function has high accuracy current and voltage regulation loops, charge status display, and charge termination. The pre-charge current and termination current threshold are fixed to 20% and 10%, respectively. The fast charge current value is programmable through an external resistor.
Features
- 1% Charge Voltage Accuracy
- 10% Charge Current Accuracy
- Low Battery Leakage Current (1 μA)
- Programmable Charge Current using External Resistor up to 800 mA
- 4.2-V Li-Ion and Li-Pol Charger
- 30-V Input Rating; with 6.6-V Input
- Overvoltage Protection
- Input Voltage Dynamic Power Management
- 125°C Thermal Regulation; 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
- Available in Small SOT-23 Package
Applications
- - EPOS - Medical Endoscopes - BLE Speaker and Headsets - Low-Power Handheld Devices
Datasheet
Alternative Parts
Common BQ21040DBVR alternatives overseas buyers search for:
Compliance & Export Codes
| Type | Details |
|---|---|
| RoHS | ROHS3 |
| ECCN | EAR99 |
| CNHTS | 8542399000 |
| USHTS | 8542390001 |
| TARIC | 8542399000 |
| Type | Details |
|---|---|
| CAHTS | 8542390000 |
| BRHTS | 85423999 |
| INHTS | 85423900 |
| MXHTS | 8542.39.99 |
Sourcing Information
Looking for a reliable source for BQ21040DBVR from Texas Instruments? SZ Procure is a China electronics sourcing partner, helping international buyers source components through our supplier network in Shenzhen.
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