LM5121
- AEC-Q100 Qualified with the following results:
- Device Temperature Grade 1: –40°C to +125°C
Ambient Operating Temperature Range - Device HBM ESD Classification Level 2
- Device CDM ESD Classification Level C6
- Device Temperature Grade 1: –40°C to +125°C
- Maximum Input Voltage: 65 V
- Min Input Voltage: 3.0 V (4.5 V for startup)
- Output Voltage Up to 100 V
- Bypass (VOUT = VIN) Operation
- 1.2-V Reference with ±1.0% Accuracy
- Free-Run/Synchronizable up to 1 MHz
- Peak Current Mode Control
- Robust Integrated 3-A Gate Drivers
- Adaptive Dead-Time Control
- Optional Diode Emulation Mode
- Programmable Cycle-by-Cycle Current Limit
- Programmable Line UVLO
- Programmable Soft-Start
- Thermal Shutdown Protection
- Low Shutdown Quiescent Current: 9 µA
- Programmable Slope Compensation
- Programmable Skip Cycle Mode Reduces
Standby Power - Supports External VCC Bias Supply Option
- Load Disconnection in Shutdown Mode (True
Shutdown) - Inrush Current Limiting
- Hiccup Mode Short Circuit/Overload Protection
- Circuit Breaker Function
- Capable of Input Transient Suppression
- Capable of Reverse Battery Protection
- Thermally Enhanced 20-Pin HTSSOP
The LM5121 is a synchronous boost controller intended for high-efficiency, high-power boost regulator applications. The control method is based upon peak current mode control. Current mode control provides inherent line feed-forward, cycle-by-cycle current limiting and ease of loop compensation.
The switching frequency is programmable up to 1 MHz. Higher efficiency is achieved using two robust N-channel MOSFET gate drivers with adaptive dead-time control. A user-selectable diode emulation mode enables discontinuous mode operation for improved efficiency at light load conditions.
The LM5121 provides disconnection switch control which completely disconnects the output from the input during an output short or a shutdown condition. During start-up sequence, inrush current is limited by the disconnection switch control.
An internal charge pump allows 100% duty cycle operation of the high-side synchronous switch (Bypass operation). Additional features include thermal shutdown, frequency synchronization, hiccup mode current limit and adjustable line undervoltage lockout.
기술 자료
| 상위 문서 | 유형 | 직함 | 형식 옵션 | 최신 영어 버전 다운로드 | 날짜 |
|---|---|---|---|---|---|
| * | 데이터 시트 | LM5121/-Q1 Wide Input Synchronous Boost Controller with Disconnection Switch Control datasheet (Rev. C) | PDF | HTML | 2016. 6. 14 | |
| 아날로그 디자인 학술지 | Designing the front-end DC/DC conversion stage to withstand automotive transient | 2017. 1. 18 | |||
| 애플리케이션 노트 | Designing Fault Protection Circuits Using Wide VIN LM5121 | 2015. 1. 12 | |||
| 백서 | How to design boost, SEPIC or flyback regulators with wide VIN power ICs | 2014. 7. 29 | |||
| 애플리케이션 노트 | Practical Feedback Loop Analysis for Current-Mode Boost Converter | 2014. 3. 7 | |||
| 애플리케이션 노트 | Automated Frequency Response Analyzer | 2013. 10. 9 |
설계 및 개발
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| 패키지 | 핀 | CAD 기호, 풋프린트 및 3D 모델 |
|---|---|---|
| HTSSOP (PWP) | 20 | Ultra Librarian |
주문 및 품질
권장 제품에는 본 TI 제품과 관련된 매개 변수, 평가 모듈 또는 레퍼런스 디자인이 있을 수 있습니다.