Model & package intelligence
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ADI/LINEAR LT4256-1CS8#TRPBF LT4256
Configuration
1 options
Configuration
Date code within 2 years
Available for RFQ
Technical data
Product details
19
specifications
Core information
- Product name
- ADI(Analog Devices) / LINEAR LT4256-1CS8#TRPBF
- Type
- ADI/LINEAR
- Minimum package
- 2500 圆盘
Technical parameters
- Electronic Component
- Electronic Component
- Electronic Component
- ADI(Analog Devices) / LINEAR
- Electronic Component
- LT4256-1CS8#TRPBF
- Electronic Component
- 1
- Electronic Component
- 4mm
- Package
- SO-8
- Electronic Component
- Surge Protector
- Electronic Component
- 0.205g
- Electronic Component
- 5mm
- Electronic Component
- 1.75mm
- FETType
- FET
- Electronic Component
- 1
- Channel Count
- 1
- Electronic Component
- BM0264458707
- Electronic Component
- Electronic Component
- Operating Temperature
- 0℃~+70℃
For datasheets, package documents, compatible-part guidance, or other technical resources, contact WMSIC customer service. Availability is confirmed case by case.
LT4256-1CS8#TRPBF 产品概述
一、概述
LT4256-1CS8（ADI/LINEAR）是一款单通道热插拔控制器，采用SO-8表面贴装封装（无铅/RoHS），专为高压系统的热插拔与电源管理设计。器件支持外置功率MOSFET作为限流开关，通过电流检测与控制逻辑实现平滑上电、过流限制及故障保护，适用于电信、工业电源模块、服务器背板等需在线插拔保护的场景。
二、主要参数
- FET类型：外置FET（N沟道外部功率管）
- 通道数：1路
- 电流检测阈值（典型）：55 mV（作为过流判据）
- 工作电压：10.8 V ~ 80 V（宽电压输入，适合48V/60V系统）
- 工作温度：0 ℃ ~ +70 ℃（商业级）
- 封装及尺寸：SO-8，约长5mm × 宽4mm × 高1.75mm
- 功能特性：过流保护、欠压锁定（UVLO）、短路保护（快速关断）
- 封装信息：SO-8 表面贴装，型号后缀#TRPBF 表示无铅/环保版本
三、功能与工作原理
LT4256-1通过外置电阻采样源端电流（采样电压阈值约55mV），在上电时控制外部FET以限制浪涌电流，实现平滑软启动；若采样电压超过阈值，器件进入限流或关闭状态并可实现定时重试或锁定（具体重试策略请参考器件数据手册）。欠压锁定确保在输入电压不足时抑制器件误动作；短路或严重过流时提供快速断开以保护系统与下游负载。
四、应用建议
- 选择外部FET时注意RDS(on)、封装热阻及耐压等级（至少高于系统最大工作电压）。
- 采样电阻Rs按目标限流值计算：Rs ≈ 55mV / I_LIMIT（例如目标5A，Rs≈11mΩ），并考虑功耗和温升。
- 在板上靠近器件布置退耦电容与感测回路，减小寄生电感，保证检测精度与响应速度。
- 对于长时间高电流工作，应评估FET与采样电阻的散热，必要时增加铜箔或散热片。
五、封装与安装注意
SO-8表面安装，推荐标准SO-8焊盘与回流工艺；器件为商业温度等级，建议工作环境温度控制在0–70℃范围内，以保证长期可靠性。产品适合贴片化生产与自动化装配。
总结：LT4256-1CS8#TRPBF为一款功能完备、工作电压宽、适配外置大功率MOSFET的单通道热插拔控制器，能在高压系统中提供有效的浪涌抑制与过流/短路保护，是电源插拔模块与热插拔板卡的理想选择。若需电路实例、参考设计或精确时序与参数，请参阅ADI/Linear官方数据手册。
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