| Distributor | Stock | Pricing | MOQ | PKG | Lead Time | Date Code | On Order Quantity | On Order Delivery | |
|---|---|---|---|---|---|---|---|---|---|
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205,455 pcs
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205455 pcs | On Request | 1 | On Request | On Request | On Request | On Request | On Request |
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| Manufacturer Name | |
| Control Interface |
The BQ21040 from Texas Instruments is a compact, highly integrated linear battery charger IC designed for space-limited portable applications. It is suitable for charging 1-cell Li-Ion and Li-Polymer batteries.
This device supports a maximum charge current of 0.8A and features a fixed charge voltage of 4.2V. It operates within an input voltage range of 3.5V to 6.45V, with an absolute maximum input voltage rating of 30V. The charger includes essential features such as battery temperature monitoring via NTC, input overvoltage protection, thermal regulation at 125°C, and thermal shutdown at 150°C.
Additional protections include output short-circuit protection and ISET short detection. The BQ21040 also incorporates a fixed 10-hour safety timer and system status indication for charging and done states. It is available in a small SOT-23 package, making it ideal for designs where space is a critical constraint.
The control interface is standalone and RC-settleable, simplifying integration into various systems. The charger's accuracy for charge voltage is 1%, and for charge current is 10%. It also offers low battery leakage current of 1 µA.
| Qty | Low | High |
|---|---|---|
| 1+ | $0.99 | $0.99 |
Estimated market price range - modelled values for guidance only, not live distributor offers.
The input voltage range is 3.5V to 6.45V, with an absolute maximum input of 30V.
The maximum charge current is 0.8A, programmable via an external resistor.
It supports single-cell Li-Ion/Li-Polymer batteries.
The regulated charge voltage is 4.2V.
The operating temperature range is 0°C to 125°C.
The BQ21040 is available in an SOT-23 (DBV) package measuring 2.9mm x 2.8mm.
Yes, it has 6.6V input overvoltage protection, with an absolute maximum input rating of 30V.
