LM51581-Q1
- AEC-Q100 qualified for automotive
applications
- Temperature grade 1: –40°C to +125°C TA
- Functional Safety-Capable
- Suited for wide operating range for car battery applications
- 3.2-V to 60-V input operating range (65-V abs max)
- 83-V maximum output (85-V abs max)
- Minimum boost supply voltage of 1.5 V when BIAS ≥ 3.2 V
- Input transient protection up to 65 V
- Minimized battery drain
- Low shutdown current (IQ ≤ 2.6 µA)
- Low operating current (IQ ≤ 670 µA)
- Small solution size and low cost
- Maximum switching frequency up to 2.2 MHz
- 16-pin QFN package (3 mm × 3 mm) with wettable flanks
- Integrated error amplifier allows primary-side regulation without optocoupler (flyback)
- Minimized undershoot during cranking
- Accurate current limit (see the Device Comparison Table)
- EMI mitigation
- Selectable dual random spread spectrum
- Lead-less package
- Higher efficiency with low-power dissipation
- 133-mΩ RDSON switch
- Fast switching, small switching loss
- Avoid AM band interference and crosstalk
- Optional clock synchronization
- Dynamically programmable wide switching frequency from 100 kHz to 2.2 MHz
- Integrated protection features
- Constant current limiting over input voltage
- Selectable hiccup mode overload protection
- Programmable line UVLO
- OVP protection
- Thermal shutdown
- Accurate ±1% accuracy feedback reference
- Adjustable soft start
- PGOOD indicator
- Create a custom design using the LM5158x -Q1 with the WEBENCH Power Designer
The LM5158x -Q1 device is a wide input range, non-synchronous boost converter with an integrated 85-V, 3.26-A (LM5158 -Q1) or 85-V, 1.63-A (LM51581 -Q1) power switch.
The device can be used in boost, SEPIC, and flyback topologies. It can start up from a single-cell battery with a minimum of 3.2 V. It can operate with the input supply voltage as low as 1.5 V if the BIAS pin is greater than 3.2 V.
The BIAS pin operates up to 60 V (65-V absolute maximum) for automotive load dump. The switching frequency is dynamically programmable from 100 kHz to 2.2 MHz with an external resistor. Switching at 2.2 MHz minimizes AM band interference and allows for a small solution size and fast transient response. The device provides a selectable Dual Random Spread Spectrum to help reduce the EMI over a wide frequency range.
The device features an accurate peak current limit over the input voltage, which avoids overdesigning the power inductor. Low operating current and pulse-skipping operation improve efficiency at light loads.
The device has built-in protection features such as overvoltage protection, line UVLO, thermal shutdown, and selectable hiccup mode overload protection. Additional features include low shutdown IQ, programmable soft start, precision reference, a power-good indicator, and external clock synchronization.
기술 자료
| 상위 문서 | 유형 | 직함 | 형식 옵션 | 최신 영어 버전 다운로드 | 날짜 |
|---|---|---|---|---|---|
| * | 데이터 시트 | LM5158x-Q1 2.2-MHz Wide VIN 85-V Output Boost/SEPIC/Flyback Converter with Dual Random Spread Spectrum datasheet (Rev. A) | PDF | HTML | 2021. 10. 20 | |
| 애플리케이션 노트 | Reducing Cabling Effort in Camera-Based Driver Monitoring Systems (DMS) | PDF | HTML | 2023. 12. 18 | ||
| 백서 | Isolated Bias Power Supply Architecture for HEV and EV Traction Inverters | PDF | HTML | 2023. 10. 11 | ||
| 애플리케이션 노트 | How to Implement the Soft Start in a Flyback | PDF | HTML | 2023. 7. 10 | ||
| 애플리케이션 노트 | How to Design an Isolated Flyback Converter Using LM5157x/LM5158x (Rev. A) | PDF | HTML | 2023. 3. 16 | ||
| 애플리케이션 노트 | Basic Calculation of a Coupled Inductor SEPIC Power Stage | PDF | HTML | 2023. 3. 13 | ||
| 애플리케이션 노트 | LM5157x, LM5158x를 사용하여 부스트 컨버터를 설계하는 방법 | PDF | HTML | Download English Version | 2022. 10. 28 | |
| 기능 안전 정보 | LM5158x-Q1 Functional Safety FIT Rate, FMD and Pin FMA | PDF | HTML | 2021. 9. 20 | ||
| 기술 문서 | Lowering audible noise in automotive applications with TI’s DRSS technology | PDF | HTML | 2021. 3. 18 |
설계 및 개발
추가 조건 또는 필수 리소스는 사용 가능한 경우 아래 제목을 클릭하여 세부 정보 페이지를 확인하세요.
LM5157EVM-SEPIC — SEPIC용 LM5157 평가 모듈
LM5157EVM-SEPIC 평가 모듈은 넓은 입력 비동기 SEPIC 컨버터로 LM5157의 기능과 성능을 보여줍니다. 표준 구성은 입력 4V~32V에서 최고 1A까지 12V의 조정 출력을 제공하며, 2.1MHz에서 스위칭하도록 설계했습니다.
LM5158EVM-BST — LM5158-Q1 부스트 컨버터 평가 모듈
LM5158EVM-FLY — LM5158-Q1 플라이백 컨버터 평가 모듈
SNVR508 — LM515x Quickstart Calculator for Flyback Regulator Design
SNVR511 — LM5157 and LM5158 Quickstart Calculator for Boost Regulator Design
SNVR512 — LM5157 and LM5158 Quickstart Calculator for SEPIC Regulator Design
| 패키지 | 핀 | CAD 기호, 풋프린트 및 3D 모델 |
|---|---|---|
| WQFN (RTE) | 16 | Ultra Librarian |
주문 및 품질
권장 제품에는 본 TI 제품과 관련된 매개 변수, 평가 모듈 또는 레퍼런스 디자인이 있을 수 있습니다.