LMR71915
- Designed for reliability in rugged applications
- Wide input voltage range of 6V to 115V
- Junction temperature range: –40°C to +150°C
- Fixed 3ms internal soft-start timer
- Peak and valley current-limit protection
- Input UVLO and thermal shutdown protection
- Designed for scalable industrial power supplies and battery packs
- Low minimum on time of 30ns and minimum off time of 50ns
- Adjustable switching frequency up to 1MHz
- Diode emulation for high light-load efficiency
- Auto mode with low quiescent current (5µA typical)
- FPWM for Fly-Buck converter capability
- 1µA shutdown quiescent current
- Pin-to-pin compatible with LM5169, LM5168, LM5164, LM5163, and LM5013
- Similar pinout and functionality to LM5017 and LM34927
- Integration reduces design size and cost
- COT mode control architecture
- Integrated 0.7Ω NFET buck switch
- Integrated 0.35Ω NFET synchronous rectifier
- 1V internal voltage reference
- No loop compensation components
- Internal VCC bias regulator and boot diode
- Open-drain power-good indicator
- SOIC PowerPAD™-8 integrated circuit package
The LMR71915 and LMR71907 synchronous buck converters are designed to regulate over a wide input voltage range, minimizing the need for external surge suppression components. A minimum controllable on time of 30ns facilitates large step-down conversion ratios, enabling the direct step-down from a 48V nominal input to low-voltage rails for reduced system complexity and design cost. The LMR719xx operates during input voltage dips as low as 6V, at nearly 100% duty cycle if needed, making the device an excellent choice for wide input supply range industrial and high cell count battery pack applications.
With integrated high-side and low-side power MOSFETs, the LMR71915 delivers up to 1.5A of output current and the LMR71907 delivers up to 0.75A of output current. A constant on-time (COT) control architecture provides nearly constant switching frequency with excellent load and line transient response. The LMR719xx is available in FPWM or auto mode versions. FPWM mode provides forced CCM operation across the entire load range supporting isolated Fly-Buck converter applications. Auto mode enables ultra-low IQ and diode emulation mode operation for high light-load efficiency.
技術文件
| 類型 | 標題 | 日期 | ||
|---|---|---|---|---|
| * | Data sheet | LMR719xx 1.5A, 0.75A, 115V, Step-Down Converter With Fly-Buck Converter Capability datasheet | PDF | HTML | 2025年 7月 16日 |
| Certificate | LMR71915EVM-FLBK EU Declaration of Conformity (DoC) | 2025年 6月 23日 |
設計與開發
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LMR71915EVM-FLBK — LMR71915EVM-FLBK Fly-Buck™ 轉換器評估模組
LMR71915EVM-FLBK 是 Fly-Buck™ 轉換器，使用 LMR71915FDDAR 產生穩壓的 12V 輸出，能夠為變壓器一次側的 625mA 負載供電，開關頻率為 500kHz。在變壓器的二次側提供 12V 反射輸出，最高可提供達 625mA。LMR71915FDDAR 是具備廣泛輸入電壓範圍、整合式功率 MOSFET、過電流保護及精密啟用功能的同步降壓轉換器。此裝置的額定操作結溫範圍為 -40°C 至 +150°C。
| 封裝 | 針腳 | CAD 符號、佔位空間與 3D 模型 |
|---|---|---|
| HSOIC (DDA) | 8 | Ultra Librarian |
訂購與品質
- 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
- 晶圓廠位置
- 組裝地點
建議產品可能具有與此 TI 產品相關的參數、評估模組或參考設計。