計算工具
產品規格表
LM51551-Q1
- AEC-Q100 qualified for automotive applications
- Temperature grade 1: –40°C to +125°C T A
- Functional Safety-Capable
- Documentation available to aid functional safety system design
- Wide input operating range for car and portable battery applications
- 3.5-V to 45-V Operating range
- 2.97-V to 16-V When BIAS = VCC
- Minimum boost supply voltage 1.5 V when BIAS ≥ 3.5 V
- Input transient protection up to 50 V
- Minimized battery drain
- Low shutdown current (I Q ≤ 2.6 µA)
- Low operating current (I Q ≤ 480 µA)
- Small solution size and low cost
- Maximum switching frequency of 2.2 MHz
- 12-Pin WSON package (3 mm × 2 mm) with wettable flanks and non-wettable flank option
- Integrated error amplifier allows primary-side regulation without optocoupler (flyback)
- Minimized undershoot during cranking (start-stop application)
- Higher efficiency with low-power dissipation
- 100-mV ±7% Low current limit threshold
- Strong 1.5-A peak standard MOSFET driver
- Supports external VCC supply
- Avoid AM band interference and crosstalk
- Optional clock synchronization
- Dynamically programmable switching frequency from 100 kHz to 2.2 MHz
- Integrated protection features
- Constant peak current limiting over input voltage
- Optional hiccup mode short-circuit protection (see the Device Comparison Table)
- Programmable line UVLO
- OVP protection
- Thermal shutdown
- Accurate ±1% accuracy feedback reference
- Programmable extra slope compensation
- Adjustable soft start
- PGOOD indicator
- Create a custom design using the LM5155x with the WEBENCH power designer
The LM5155x-Q1 (LM5155-Q1 and LM51551-Q1) is a wide input range, non-synchronous boost controller that uses peak current mode control. The device can be used in boost, SEPIC, and flyback topologies.
The LM5155x-Q1 can start up from a 1-cell battery with a minimum of 2.97 V if the BIAS pin is connected to the VCC pin. It can operate with the input supply voltage as low as 1.5 V if the BIAS pin is greater than 3.5 V.
技術文件
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檢視所有 9 | 類型 | 標題 | 日期 | ||
|---|---|---|---|---|
| * | Data sheet | LM5155x-Q1 2.2-MHz Wide Input Nonsynchronous Boost, SEPIC, Flyback Controller datasheet (Rev. F) | PDF | HTML | 2023年 5月 3日 |
| White paper | Isolated Bias Power Supply Architecture for HEV and EV Traction Inverters | PDF | HTML | 2023年 10月 11日 | |
| Application note | How to Implement the Soft Start in a Flyback | PDF | HTML | 2023年 7月 10日 | |
| Application note | How to Design an Isolated Flyback Using LM5155 (Rev. A) | PDF | HTML | 2021年 1月 5日 | |
| Functional safety information | LM5155-Q1, LM51551-Q1 Functional Safety FIT Rate and Failure Mode Distribution | 2020年 2月 5日 | ||
| Application note | How to Design a Boost Converter Using LM5155 | 2018年 12月 17日 | ||
| EVM User's guide | LM5155EVM-BST User's Guide | 2018年 12月 11日 | ||
| EVM User's guide | LM5155EVM-FLY User's Guide | 2018年 8月 2日 | ||
| EVM User's guide | LM5155EVM-SEPIC User's Guide | PDF | HTML | 2018年 8月 2日 |
設計與開發
如需其他條款或必要資源，請按一下下方的任何標題以檢視詳細頁面 (如有)。
開發板
LM5155EVM-BST — LM5155 升壓控制器評估模組
The LM5155EVM-BST evaluation module showcases the features and performance of the LM5155, wide input non-synchronous boost controller. The standard configuration is designed to provide a regulate output of 24V at 2A from an input of 6V to 18V, switching at 440 kHz.
This EVM is designed for ease of (...)
使用指南: PDF
開發板
LM5155EVM-FLY — LM5155 返馳式控制器評估模組
The LM5155EVM-FLY evaluation module showcases the features and performance of the LM5155 as a wide input non-synchronous flyback controller. The standard configuration is designed to provide a regulated output of 5V at 4A from an input of 18V to 36V, switching at 250 kHz. This evaluation module is (...)
使用指南: PDF
開發板
LM5155EVM-SEPIC — LM5155 SEPIC 評估模組
The LM5155EVM-SEPIC evaluation module showcases the features and performance of the LM5155 as wide input non-synchronous SEPIC controller. The standard configuration is designed to provide a regulated output of 12V at up to 2A from an input of 3V to 42V, switching at 2.2 MHz.
計算工具
SNVC240 — LM5155/56 Flyback Controller Quick Start Calculator
LM5155/56 Flyback Controller Quick Start Calculator
支援產品和硬體
產品
AC/DC 和 DC/DC 控制器 (外部 FET)
硬體開發
開發板
計算工具
SNVR481 — LM5155/56 SEPIC Controller Quick Start Calculator
支援產品和硬體
產品
AC/DC 和 DC/DC 控制器 (外部 FET)
硬體開發
開發板
參考設計
PMP30921 — 4-W 非連續導通模式一次側穩壓返馳參考設計
這款微型 4-W 返馳式轉換器具有額外的三個隔離輸出繞組，總共可產生四個輸出。主繞組和輔助繞組串聯之間的繞組比達到 1:1，就可用交流飛馳電容器取代傳統 RCD 緩衝器，以提供更高的效率和更低的 EMI；這需要最低的漏感。汽車輸入範圍為 7-V 至 42-V 突波。三個輸出由低壓差線性穩壓器進行後調節，以改善線路和負載調節及電源漣波抑制 (PSRR)。
已新增差動輸入濾波器來衰減傳導發射，蕭特基整流器則提供反向極性保護。針對使用通用控制器進行多輸出一次側調節的所有方法，輔助繞組串聯無負載是交互調節的限制。
Test report: PDF
參考設計
PMP30700 — 車用四軌 17-W 隔離式返馳參考設計
This reference design is an isolated flyback that supplies four independent rails; each of them delivers 14 V @ 300 mA. The voltage feedback loop is closed to primary side, therefore, avoiding the optocoupler and increasing the reliability of the converter. The high switching frequency (500 KHz) (...)
參考設計
PMP30805 — 小型汽車 SEPIC 參考設計
This tiny automotive SEPIC reference design contains a 6-W auxiliary power supply and is designed for a 12-V bias rail. The wide input accepts cranking down to 4.5 Vmin and surge up to 40 Vmax. Due to switching frequency of 2 MHz, the dual inductor is fairly small, resulting in excellent dynamic (...)
參考設計
PMP21629 — 適用於 LIDAR 應用的 40-V 至 80-V 可調整輸出電壓升壓參考設計
This reference design utilizes a non-synchronous boost controller to provide an adjustable output of between 40 V and 80 V capable of delivering a maximum of 100 mA of current to the load. This is an automotive design intended to power various applications such as LiDAR systems, which require an (...)
| 封裝 | 針腳 | CAD 符號、佔位空間與 3D 模型 |
|---|---|---|
| WSON (DSS) | 12 | Ultra Librarian |
訂購與品質
內含資訊：
- RoHS
- REACH
- 產品標記
- 鉛塗層/球物料
- MSL 等級/回焊峰值
- MTBF/FIT 估算值
- 材料內容
- 認證摘要
- 進行中持續性的可靠性監測
內含資訊：
- 晶圓廠位置
- 組裝地點