BQ21040DBVT
ActiveLINEAR BATTERY CHARGER LI-ION/LI-POL 800MA 4.2V 6-PIN SOT-23 T/R
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BQ21040DBVT
ActiveLINEAR BATTERY CHARGER LI-ION/LI-POL 800MA 4.2V 6-PIN SOT-23 T/R
Technical Specifications
Parameters and characteristics for this part
| Specification | BQ21040DBVT |
|---|---|
| Battery Chemistry | Lithium Ion/Polymer |
| Battery Pack Voltage | 4.2 V |
| Charge Current - Max [Max] | 800 mA |
| Current - Charging | Constant - Programmable |
| Fault Protection | Over Temperature, Short Circuit, Over Voltage |
| Interface | USB |
| Mounting Type | Surface Mount |
| Number of Cells | 1 |
| Operating Temperature [Max] | 125 ¯C |
| Operating Temperature [Min] | 0 °C |
| Package / Case | SOT-23-6 |
| Supplier Device Package | SOT-23-6 |
| Voltage - Supply (Max) [Max] | 6.45 V |
Pricing
Prices provided here are for design reference only. For realtime values and availability, please visit the distributors directly
| Distributor | Package | Quantity | $ | |
|---|---|---|---|---|
| Digikey | Cut Tape (CT) | 1 | $ 2.77 | |
| 10 | $ 1.79 | |||
| 25 | $ 1.53 | |||
| 100 | $ 1.25 | |||
| Digi-Reel® | 1 | $ 2.77 | ||
| 10 | $ 1.79 | |||
| 25 | $ 1.53 | |||
| 100 | $ 1.25 | |||
| Tape & Reel (TR) | 250 | $ 1.10 | ||
| 500 | $ 1.02 | |||
| 750 | $ 0.98 | |||
| 1250 | $ 0.93 | |||
| 1750 | $ 0.90 | |||
| 2500 | $ 0.87 | |||
| 6250 | $ 0.81 | |||
| 12500 | $ 0.78 | |||
| Texas Instruments | SMALL T&R | 1 | $ 1.53 | |
| 100 | $ 1.18 | |||
| 250 | $ 0.87 | |||
| 1000 | $ 0.62 | |||
Description
General part information
BQ21040 Series
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.
Documents
Technical documentation and resources
