LM3420
- Input Voltage Range: up to 20 V
- Voltage Options for Charging 1, 2, 3, or 4 Cells
- Output Current up to 15 mA
- Precision (0.5%) End-of-Charge Control
- LM3420 ±1%
- LM3420A ±0.5%
- Drive Capability for External Power Stage
- Temperature Drift Curvature Correction for
Voltage Stability - Low Quiescent Current, 85 µA (Typ.)
- Tiny SOT-23-5 package
The LM3420 series of controllers are monolithic integrated circuits designed for charging and end-of-charge control for lithium-ion rechargeable batteries. The LM3420 is available in an 8.4-V version for one through four cell charger applications.
Included in a very small package is an (internally compensated) op amp, a bandgap reference, an NPN output transistor, and voltage setting resistors. The amplifier’s inverting input is externally accessible for loop frequency compensation. The output is an open-emitter NPN transistor capable of driving up to 15 mA of output current into external circuitry.
A trimmed precision bandgap reference utilizes temperature drift curvature correction for excellent voltage stability over the operating temperature range. The LM3420 series allows for precision end-of-charge voltage threshold for lithium-ion rechargeable batteries. The premium grade LM3420A is available with an initial voltage threshold tolerance of ±0.5%, while the standard grade LM3420 has an initial voltage threshold tolerance of ±1%.
The LM3420 is available in a sub-miniature 5-lead surface mount package thus allowing very compact designs.
技術文件
| 類型 | 標題 | 日期 | ||
|---|---|---|---|---|
| * | Data sheet | LM3420 8.4-V Li-Ion Battery Charge Controller datasheet (Rev. E) | PDF | HTML | 2014年 12月 15日 |
| EVM User's guide | AN-1967 LM3424 Buck-Boost Evaluation Board (Rev. A) | 2013年 5月 3日 | ||
| EVM User's guide | AN-1969 LM3424 Boost Evaluation Board (Rev. A) | 2013年 5月 3日 | ||
| EVM User's guide | AN-1985 LM3429 Buck-Boost Evaluation Board (Rev. C) | 2013年 5月 3日 | ||
| EVM User's guide | AN-1986 LM3429 Boost Evaluation Board (Rev. B) | 2013年 5月 3日 | ||
| EVM User's guide | AN-1872 LM3423 Boost Evaluation Board (Rev. B) | 2013年 5月 1日 | ||
| EVM User's guide | AN-1907 LM3423 Buck-Boost Configuration Evaluation Board (Rev. A) | 2013年 5月 1日 | ||
| Application note | Battery Charging | 2007年 3月 21日 |
設計與開發
如需其他條款或必要資源，請按一下下方的任何標題以檢視詳細頁面 (如有)。
| 封裝 | 引腳 | 下載 |
|---|---|---|
| SOT-23 (DBV) | 5 | 檢視選項 |
訂購與品質
- RoHS
- REACH
- 產品標記
- 鉛塗層/球物料
- MSL 等級/回焊峰值
- MTBF/FIT 估算值
- 材料內容
- 資格摘要
- 進行中可靠性監測
- 晶圓廠位置
- 組裝地點