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비교 대상 장치와 유사한 기능
LM3421
- VIN Range From 4.5 V to 75 V
- High-Side Adjustable Current Sense
- 2-Ω, 1-A Peak MOSFET Gate Driver
- Input Undervoltage and Output Overvoltage Protection
- PWM and Analog Dimming
- Cycle-by-Cycle Current Limit
- Programmable Switching Frequency
- Zero Current Shutdown and Thermal Shutdown
- LED Output Status Flag (LM3423 and LM3423-Q0 Only)
- Fault Status Flag and Timer(LM3423 and LM3423-Q0 Only)
The LM3421 and LM3423 family of devices are versatile high voltage N-channel MOSFET controllers for LED drivers. They can be easily configured in buck, boost, buck-boost and SEPIC topologies. This flexibility, along with an input voltage rating of 75 V, makes the these controllers ideal for illuminating LEDs in a large family of applications.
Adjustable high-side current sense voltage allows for tight regulation of the LED current with the highest efficiency possible. The LM3421 and LM3423 devices use predictive off-time (PRO) control, which is a combination of peak current-mode control and a predictive off-timer. This method of control eases the design of loop compensation while providing inherent input voltage feed-forward compensation.
The LM3421 and LM3423 devices include a high-voltage start-up regulator that operates over a wide input range of 4.5 V to 75 V. The internal PWM controller is designed for adjustable switching frequencies of up to 2 MHz, thus enabling compact solutions.
기술 자료
| 유형 | 직함 | 날짜 | ||
|---|---|---|---|---|
| * | Data sheet | LM342x N -Channel Controllers for Constant-Current LED Drivers datasheet (Rev. G) | PDF | HTML | 2019/07/30 |
| Selection guide | Power Management Guide 2018 (Rev. R) | 2018/06/25 | ||
| Technical article | Driving LEDs: topology matters | PDF | HTML | 2016/02/26 | |
| Application note | AN-1656 Design Challenges of Switching LED Drivers (Rev. A) | 2013/05/03 | ||
| EVM User's guide | LM3421 SEPIC LED Driver Evaluation Board for Automotive Applications (Rev. B) | 2013/05/03 | ||
| EVM User's guide | AN-1907 LM3423 Buck-Boost Configuration Evaluation Board (Rev. A) | 2013/05/01 | ||
| Application note | AN-1982 Small, Wide Input Voltage Range LM2842 Keeps LEDs Cool (Rev. A) | 2013/04/23 |
설계 및 개발
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| 패키지 | 핀 | CAD 기호, 풋프린트 및 3D 모델 |
|---|---|---|
| HTSSOP (PWP) | 16 | 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
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