2.97V 至 48V 高效升压、SEPIC 和反激式控制器
产品详细信息
参数
封装|引脚|尺寸
特性
- LM3481QMM are Automotive-Grade Products
That are AEC-Q100 Grade 1 Qualified (–40°C to
+125°C Operating Junction Temperature) - 10-Lead VSSOP Package
- Internal Push-Pull Driver With 1-A Peak Current
Capability - Current Limit and Thermal Shutdown
- Frequency Compensation Optimized With a Capacitor
and a Resistor - Internal Softstart
- Current Mode Operation
- Adjustable Undervoltage Lockout With Hysteresis
- Pulse Skipping at Light Loads
- Key Specifications
- Wide Supply Voltage Range of 2.97 V to 48 V
- 100-kHz to 1-MHz Adjustable and Synchronizable
Clock Frequency - ±1.5% (Over Temperature) Internal
Reference - 10-µA Shutdown Current (Over Temperature)
描述
The LM3481 device is a versatile Low-Side N-FET high-performance controller for switching regulators. The device is suitable for use in topologies requiring a low-side FET, such as boost, flyback, SEPIC, and so on. The LM3481 device can be operated at extremely high switching frequencies to reduce the overall solution size. The switching frequency of the LM3481 device can be adjusted to any value between 100kHz and 1MHz 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 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.
技术文档
设计与开发
有关其他条款或所需资源,请点击下面的任何链接来查看详情页面。硬件开发
说明
特性
- 电流模式操作
- 具备磁滞的可调节欠压锁定
- 轻负载状态下的脉冲跳跃
- 具备 1A 峰值电流功能的内部推挽驱动器
说明
The LM3481 is a current mode, low side N channel FET controller. It can be utilized in numerous configurations including a Boost, Flyback or SEPIC (Single Ended Primary Inductor Converter). This evaluation board demonstrates the flexibility of the LM3481 in a boost topology providing 12 volt output (...)
说明
The LM3481 SEPIC evaluation board is designed to provide the design engineer with a fully functional power converter solution with two output voltage options. It produces a selectable output voltage of 12 V at 1.25A or 5V at 3A. The switching frequency for the converter is set to 500 kHz. The (...)
特性
5V Output Voltage Option:
- Input Voltage Range : 4.5V to 25V
- Output Voltage : 5V ± 2%
- Output Current : 0A to 3A
- Switching Frequency : 500 kHz
- Load Regulation : 0.1%
- Board Size : 2.4 x 1.8 inches
12V Output Voltage Option:
- Input Voltage Range : 4.5V to 18V
- Output Voltage : 12V ± 2%
- Output Current : 0A to 1.25A
- (...)
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入门
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特性
- 利用 Cadence PSpice 技术
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- 自动测量和后处理
- Monte Carlo 分析
- 最坏情形分析
- 热分析
特性
- 采用隔离式拓扑,如 Fly-Buck™、Fly-Buck-Boost、DCM 和 CCM 反激式
- 能够设计多达 6 路隔离式输出
- 针对所需的应用设计建议 IC
- 在设计中包含回路补偿
- 比较每个拓扑的效率、外部组件数和变压器电流
参考设计
CAD/CAE 符号
封装 | 引脚 | 下载 |
---|---|---|
VSSOP (DGS) | 10 | 了解详情 |
订购与质量
- RoHS
- REACH
- 器件标识
- 引脚镀层/焊球材料
- MSL 等级/回流焊峰值温度
- MTBF/FIT 估算
- 材料成分
- 认证摘要
- 持续可靠性监测
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