LM51772
- Input range from 0V (V(BIAS) ≥ 3.5V) to 55V
- Output voltage 1V to 55V
- Dynamical Vo programming via I2C from:
- 3.3V up to 48V in 20mV monotonous steps
- 1V up to 24V in 10mV monotonous steps
- Peak current regulation control
- Small voltage transition ripple over all operating modes
- Dynamic output voltage tracking (digital PWM tracking input, analog tracking input)
- Via I2C interface programming
- Shut down quiescent current 3µA
- Operating quiescent current 60µA
- DRV pin for external FET control
- Operation mode selection for high efficiency in light load and high load conditions:
- Power save mode (burst/µSleep)
- Automatic/programmable conduction mode
- Integrated high voltage supply LDO
- Auxiliary high voltage LDO/reference
- Integrated full-bridge gate drive
- 2A peak current capability
- Bootstrap over and under-voltage protection
- Integrated boot-strap diode
- Fixed frequency independent from operating mode (boost, buck-boost, buck)
- Forced PWM mode selectable
- Switching frequency from 100kHz to 2.2MHz
- External clock synchronization and clock output
- Spread spectrum operation selectable
- Average input or output current sensor
- Programmable from 0.5A (5mV) to 7A (70mV) in 50mA (500µV) steps
- ISET pin selectable
- I2C Interface readout of monitoring features
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Create a custom design using the LM51772 with the WEBENCH® Power Designer
The LM51772 is a four switch Buck-Boost controller. It provides a regulated output voltage if the input voltage is higher, equal or lower than the adjusted output voltage. In power save mode the device supports very high efficiency over the complete operation range of the output. The LM51772 runs at a fixed switching frequency, which can be set via the RT/SYNC pin. The switching frequency remains constant during buck, boost and buck-boost operation in forced PWM. The external compensation pin allows very fast transient response for different applications. The device maintains small mode transition ripple over all operating modes. The output voltage and device configurations can be dynamically programmed via the integrated I2C interface. The integrated and optional high-side current sensor features an accurate output or input current limitation. The average current limit of the LM51772 is also configurable through the I2C interface.
기술 자료
유형 | 직함 | 날짜 | ||
---|---|---|---|---|
* | Data sheet | LM51772 55V 4-Switch Buck-Boost Controller with I2 C interface datasheet (Rev. B) | PDF | HTML | 2024/06/21 |
Application brief | Current Monitoring with Positive and Negative Currents on LM5177x Devices (Rev. A) | PDF | HTML | 2024/11/25 | |
Application note | Parallel Operation of the Buck-Boost Converters Using LM51772 Buck-Boost Controller | PDF | HTML | 2024/08/27 | |
Application note | Layout Optimization of 4-Switch Buck-Boost Converters | PDF | HTML | 2023/09/05 |
설계 및 개발
추가 조건 또는 필수 리소스는 사용 가능한 경우 아래 제목을 클릭하여 세부 정보 페이지를 확인하세요.
LM51772EVM-HP — LM51772 평가 모듈
LM51772EVM-HP는 LM51772 와이드 VIN 벅-부스트 컨트롤러를 사용하여 유연한 고전력 벅-부스트 설계를 시연합니다. 평가 모듈은 입력 전압 범위 9V~48V에서 작동하도록 구성되어 있으며, 최대 5A의 부하 전류로 조정된 20V 출력을 제공합니다.
LM51772-QUICKSTART-CALC — LM51772 BuckBoost Quickstart Calculator Tool
지원되는 제품 및 하드웨어
제품
AC/DC 및 DC/DC 컨트롤러(외장 FET)
하드웨어 개발
평가 보드
패키지 | 핀 | CAD 기호, 풋프린트 및 3D 모델 |
---|---|---|
VQFN (RHA) | 40 | 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