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.
기술 자료
| 유형 | 직함 | 날짜 | ||
|---|---|---|---|---|
| * | Data sheet | LM3420 8.4-V Li-Ion Battery Charge Controller datasheet (Rev. E) | PDF | HTML | 2014/12/15 |
| EVM User's guide | AN-1969 LM3424 Boost Evaluation Board (Rev. A) | 2013/05/03 | ||
| EVM User's guide | AN-1985 LM3429 Buck-Boost Evaluation Board (Rev. C) | 2013/05/03 | ||
| EVM User's guide | AN-1986 LM3429 Boost Evaluation Board (Rev. B) | 2013/05/03 | ||
| EVM User's guide | AN-1872 LM3423 Boost Evaluation Board (Rev. B) | 2013/05/01 | ||
| EVM User's guide | AN-1907 LM3423 Buck-Boost Configuration Evaluation Board (Rev. A) | 2013/05/01 | ||
| Application note | Battery Charging | 2007/03/21 |
설계 및 개발
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| 패키지 | 핀 | CAD 기호, 풋프린트 및 3D 모델 |
|---|---|---|
| SOT-23 (DBV) | 5 | Ultra Librarian |
주문 및 품질
- RoHS
- REACH
- 디바이스 마킹
- 납 마감/볼 재질
- MSL 등급/피크 리플로우
- MTBF/FIT 예측
- 물질 성분
- 인증 요약
- 지속적인 신뢰성 모니터링
- 팹 위치
- 조립 위치