Analog Devices / Maxim Integrated MAX14692-MAX14693 高精度可调节功率限制器
美信MAX14692-MAX14693 高精度可调节功率限制器是具有可调节过压、欠压和过流保护功能的器件，当出现过流以及正向过压和反向电压故障时，对系统提供保护。当与一种可选的外部 p-通道 MOSFET 配套使用时，该器件还保护下游电路免遭高达 ±60V 的电压故障的影响。该器件还包括一个集成了 31mΩ 低导通电阻的 FET。在启动期间，对于在输入上采用大存储量电容器至下游设备的应用而言，该器件可在连续模式下将大量电容聚集在输出上。此外，该器件还将限流模式分为两阶段，在启动后的一小段时间内，将电流一直限制为设计限值的 1.5 或 2 倍。这样启动期间可以更快速地为大负载器件充电。
ADI MAX14692-MAX14693 power limiters feature a low, 31mΩ, on-resistance integrated FET. During startup, these devices are designed to charge large capacitances on the output in a continuous mode for applications where large reservoir capacitors are used on the inputs to downstream devices. These devices offer a dual-stage, current-limit mode in which the current is continuously limited to 1.5x or 2x the programmed limit, respectively, for a short time after startup. This feature enables faster charging of large loads during startup.
特性
- Robust, high-power protection reduces system downtime
- +5.5V to +58V wide input range
- Negative input tolerance to -60V with external pFET
- Low 31mΩ (typ) RON
- Reverse current-blocking protection with external pFET
- Enables fast startup and brownout recovery
- Thermal foldback current-limit protection
- Dual-stage current limiting
- 1.5x startup current (MAX14692)
- 2.0x startup current (MAX14693)
- Flexible design enables reuse and less requalification
- Adjustable OVLO and UVLO thresholds
- Programmable forward current limit from 0.6A to 6A with ±15% accuracy over full temperature range
- Normal and high-voltage enable inputs (EN and HVEN)
- Protected external pFET gate drive
- Saves board space and reduces external BOM count
- 20-pin 5mm x 5mm TQFN package
- Integrated nFET
应用
- Industrial power systems
- Control and automation
- Motion system drives
- Human machine interfaces
- High-power applications
发布日期: 2015-01-15
| 更新日期: 2023-04-17