1-cell, 1-A, Li-ion linear battery charger with automatic AC/USB detection
Product details
Parameters
Package | Pins | Size
Features
- Charging
- 1% Charge Voltage Accuracy
- 10% Charge Current Accuracy
- Pin Selectable USB 100-mA and 500-mA
Maximum Input Current Limit - Programmable Termination and Precharge
Threshold
- Protection
- 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 ISETShort
Detection - Operation Over JEITA Range Through Battery
NTC – \xBD Fast-Charge-Current at Cold,
4.06 V at Hot - Fixed 10-Hour Safety Timer
- 30-V Input Rating; With 6.6-V Input
- System
- Auto Input Source Detection (D+, D– Pins)
No Device Transceiver Required USB Friendly - Automatic Termination and Timer Disable Mode
(TTDM) for Absent Battery Pack With Thermistor - Status Indication – Charging/Done
- Available in Small 2-mm × 2-mm or
2-mm × 3-mm Package
- Auto Input Source Detection (D+, D– Pins)
- APPLICATIONS
- Smart Phones
- PDAs
- MP3 Players
- Low-Power Handheld Devices
All other trademarks are the property of their respective owners
Description
The bq2405x series of devices are highly integrated Li-Ion and Li-Pol linear chargers devices targeted at space-limited portable applications. The devices operate from either a USB port or AC adapter. The high-input voltage range with input overvoltage protection supports low-cost unregulated adapters.
The bq2405x 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 precharge current and termination current threshold are programmed through an external resistor. The fast charge current value is also programmable through an external resistor.
Technical documentation
Type | Title | Date | |
---|---|---|---|
* | Datasheet | bq2405x 1-A, Single-Cell Li-Ion and Li-Pol Battery Charger With Automatic Adaptor and USB Detection datasheet (Rev. C) | Dec. 11, 2014 |
Technical articles | When to use rechargeable batteries in small battery applications | Oct. 01, 2019 | |
Application note | BQ2404x, BQ2405x, and BQ2409x Frequently Asked Questions | Feb. 25, 2019 | |
Technical articles | Should I use a linear charger or a switching charger? | Oct. 30, 2015 | |
Technical articles | Summertime and the livin' is easy | Jun. 20, 2014 | |
Application note | Selecting the Best bq2404x/5x/9x Single Cell Battery Charger for your Applicatio | Nov. 29, 2012 | |
Application note | 2Q 2012 Issue Analog Applications Journal | Apr. 26, 2012 | |
More literature | Журнал по применению аналоговых компонентов 1 кв. 2010 | Sep. 23, 2010 | |
Application note | Li-ion battery-charger solutions for JEITA compliance | Jan. 29, 2010 | |
User guide | 0.8-A, Single-Input, Single-Cell Li-Ion Battery Charger UG | Sep. 29, 2009 |
Design & development
For additional terms or required resources, click any title below to view the detail page where available.Hardware development
Description
0.8-A, Single-Input, Single-Cell Li-Ion Battery Charger
The bq2405x series of devices are highly integrated Li-ion linear chargers devices targeted at space-limited portable applications. The devices operate from either a USB port or AC adapter. The bq2405x has a single power output that charges the (...)
Design tools & simulation
Reference designs
Design files
-
download PMP5722 BOM.pdf (17KB) -
download PMP5722 Assembly Drawing.pdf (34KB) -
download PMP5722 CAD Files.zip (366KB) -
download PMP5722 Gerber.zip (274KB)
CAD/CAE symbols
Package | Pins | Download |
---|---|---|
WSON (DSQ) | 10 | View options |
Ordering & quality
- RoHS
- REACH
- Device marking
- Lead finish/Ball material
- MSL rating/Peak reflow
- MTBF/FIT estimates
- Material content
- Qualification summary
- Ongoing reliability monitoring
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