EVAL6924D: Single Li-Ion Battery Charger
Summary
The L6924D is a fully monolithic battery charger dedicated to single-cell Li-Ion/Polymer battery packs. It is the ideal solution for space-limited applications, like PDAs, handheld equipment, cellular phones, and digital cameras. It is designed with BCD6 technology and integrates all of the power elements (the Power MOSFET, reverse blocking diode and the sense resistor) in a small VFQFPN16 3mm x 3mm package.
When an external voltage regulated wall adapter is used, the L6924D works in Linear Mode, and charges the battery in a Constant Current/Constant Voltage (CC/CV) profile. Moreover, when a current-limited adapter is used, the device can operate in Quasi-Pulse Mode, dramatically reducing the power dissipation. Regardless of the charging approach, a closed loop thermal control avoids device overheating.
The device has an operating input voltage ranging from 2.5V to 12V and it allows the user to program many parameters, such as pre-charge current, fast-charge current, pre-charge voltage threshold, end-of-charge current threshold, and charge timer. Features a programmable charge current up to 1A.
When an external voltage regulated wall adapter is used, the L6924D works in Linear Mode, and charges the battery in a Constant Current/Constant Voltage (CC/CV) profile. Moreover, when a current-limited adapter is used, the device can operate in Quasi-Pulse Mode, dramatically reducing the power dissipation. Regardless of the charging approach, a closed loop thermal control avoids device overheating.
The device has an operating input voltage ranging from 2.5V to 12V and it allows the user to program many parameters, such as pre-charge current, fast-charge current, pre-charge voltage threshold, end-of-charge current threshold, and charge timer. Features a programmable charge current up to 1A.
Specifications
| Manufacturer | STMicroelectronics |
|---|---|
| Category | Power Management |
| Sub-Category | Battery Chargers |
| Eval Board Part Number | 497-5504-ND |
| Eval Board Supplier | STMicroelectronics |
| Eval Board |
Board not Stocked
|
| Cell Type |
Lithium Ion, Li-Ion
|
| Configuration |
1 Cell
|
| Voltage In |
2.5 ~ 12 V
|
| Voltage Out |
4.1 V
4.2 V |
| Current Out |
500 mA
1 A |
| Features |
Cell Preconditioning
Cell Temperature Monitoring Current Limit (Adj. or Fixed) Fault Indication Low Battery Warning Over Charge Protection Over Current Protection Power Save Mode Reverse Polarity Protection Shutdown, Enable, Standby Status Indication Thermal Protection |
| Quiescent Current [Typical] |
1.8 mA
|
| Sleep Mode Current [Typical] | |
| Component Count + Extras |
17 + 5
|
| Application / Target Market |
Audio: MP3 Players
Cell Phones Digital Cameras Portable Devices USB Powered Devices |
| Design Author |
STMicroelectronics
|
| Main I.C. Base Part |
L6924D
|
| Quiescent Current [Maximum] |
2.5 mA
|
| Sleep Mode Current [Maximum] |
80 µA
|
| Date Created By Author | |
| Date Added To Library | 2011-03 |
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