圖片僅供參考
| FLYiNG 零件編號 | ICLM3481QMMXNOPBTI |
| FLYiNG 庫存現貨 | 電洽/Contact |
| 製造商 | TEXAS INSTRUMENTS |
| 製造商零件編號 | LM3481QMMX/NOPB |
| 說明 | LM3481QMMX/NOPB VSSOP-10 TI |
| 無鉛狀態 / RoHS 指令狀態 | RoHS |
| 系列 | LM2734 |
| 原廠料號 | LM2734XMK/NOPB |
| 輸出數 | 1 |
| 輸出電壓 | 1.275 V to 41 V |
| 輸出電流 | 10A |
| 安裝類型 | SMD表面黏著式 |
| 工作溫度 | -40°C ~ 125°C |
| 封裝／外殼 | VSSOP-10 |
| 標準包裝數量 | 3500/Reel |
文件:LM3481-Q1.png)
LM3481-Q1
High-Efficiency Controller for Boost, SEPIC and Flyback DC/DC Converters
Features
LM3481-Q1
High-Efficiency Controller for Boost, SEPIC and Flyback DC/DC Converters
Features
- AEC-Q100 Qualified for automotive applications:
- Device temperature grade 1: -40°C to +125°C, TA
- 10-Lead VSSOP package
- Internal push-pull driver with 1A peak current capability
- Current limit and thermal shutdown
- Frequency compensation optimized with a capacitor and a resistor
- Internal soft start
- Current mode operation
- Adjustable undervoltage lockout with hysteresis
- Pulse skipping at light loads
- Key specifications
- Wide supply voltage range of 2.97V to 48V
- 100kHz to 1MHz Adjustable and synchronizable clock frequency
- ±1.5% (over temperature) internal reference
- 10μA shutdown current (over temperature)
- Create a custom design using the LM3481-Q1 with the WEBENCH Power Designer
- Isolated Supply (Flyback) in Traction inverters andOn-board chargers
- ADAS - Driver monitoring
- Digital Cockpit and Head Unit
The LM3481-Q1 device is a versatile Low-Side N-FET high-performance controller for switching regulators. The device is designed for use in boost, SEPIC and flyback converters and topologies requiring a low-side FET as the primary switch. The LM3481-Q1 device can be operated at very high switching frequencies to reduce the overall solution size. The switching frequency of the LM3481-Q1 device can be adjusted to any value between 100 kHz and 1 MHz by using a single external resistor or by synchronizing it to an external clock. Current mode control provides superior bandwidth and transient response in addition to cycle-by-cycle current limiting. Current limit can be programmed with a single external resistor.
The LM3481-Q1 device has built-in protection features such as thermal shutdown, short-circuit protection and overvoltage protection. Power-saving shutdown mode reduces the total supply current to 5 μA and allows power supply sequencing. Internal soft start limits the inrush current at start-up. Integrated current slope compensation simplifies the design and, if needed for specific applications, can be increased using a single resistor.
The LM3481-Q1 device has built-in protection features such as thermal shutdown, short-circuit protection and overvoltage protection. Power-saving shutdown mode reduces the total supply current to 5 μA and allows power supply sequencing. Internal soft start limits the inrush current at start-up. Integrated current slope compensation simplifies the design and, if needed for specific applications, can be increased using a single resistor.
LM3481-Q1
高效能升壓、SEPIC 及返馳式 DC/DC 轉換器控制器
特性
- 符合 AEC-Q100 車規認證：
- 溫度等級 1：-40°C 至 +125°C（TA）
- 10 引腳 VSSOP 封裝
- 內建推挽式驅動器，峰值驅動電流達 1A
- 內建電流限制與過熱保護
- 使用電容與電阻進行頻率補償
- 內建軟啟動，減少啟動電流衝擊
- 電流模式控制，提升瞬態響應與頻寬
- 具備可調式欠壓鎖定 (UVLO) 與遲滯功能
- 輕載時具脈衝跳躍模式 (Pulse Skipping)
- 關鍵規格:
- 寬輸入電壓範圍：2.97V 至 48V
- 可調與可同步時脈頻率：100kHz 至 1MHz
- 內部參考電壓精度：±1.5%（涵蓋溫度範圍）
- 關斷模式電流：10μA（涵蓋溫度範圍）
- 可透過 WEBENCH® Power Designer 進行設計優化
應用領域
- 車載隔離式電源供應器（返馳式變換器）（如動力逆變器與車載充電器）
- ADAS（先進駕駛輔助系統） - 駕駛員監測系統
- 數位座艙與車載資訊娛樂系統
產品描述
LM3481-Q1 為一款多用途、低側 N 通道 MOSFET 高效能控制器，適用於升壓 (Boost)、SEPIC 及返馳式 (Flyback) 轉換器。此控制器支援高頻開關運作，能有效減小電源解決方案的尺寸。
LM3481-Q1 的開關頻率可透過單一外部電阻調整，範圍涵蓋 100kHz 至 1MHz，或與外部時鐘同步。內建的電流模式控制提升頻寬與瞬態響應，並具備逐週期電流限制，可透過單一電阻設定。
此外，LM3481-Q1 內建保護機制，包括 過熱保護、短路保護與過壓保護。當進入關機模式時，總供應電流降至 5μA，可實現電源序列控制。
內建的電流斜率補償簡化了設計，若應用需求需要額外補償，可透過單一電阻進行調整。
