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Maxim产品 - MAX5912介绍

MAX5912 - -48V、Simple Swapper热插拔开关

MAX5912是Maxim美信半导体公司的一款热插拔和电源开关产品，MAX5912是-48V、Simple Swapper热插拔开关，本站介绍了MAX5912的封装应用图解、特点和优点、功能等，并给出了与MAX5912相关的Maxim元器件型号供参考。

MAX5912 - -48V、Simple Swapper热插拔开关 - 热插拔和电源开关 - -48V热插拔开关，适用于IP电话和通过同一电缆传输数据、电源的数据终端设备 - 美信半导体

产品概述

The MAX5911/MAX5912 are fully integrated hot-swap switches for negative supply rails. These devices allow the safe insertion and removal of circuit cards into live backplanes or ports without causing problematic glitches on the negative power-supply rail. They also monitor various circuit parameters and disconnect the load if a fault condition occurs, alerting the host with a logic-level FAULT-bar output. The MAX5911/MAX5912 operate over a voltage range of -16V to -65V and are designed to permit hot plugging of an IP phone into a hub, but are not limited to that operation.

During startup, an internal power FET regulates the current between the backplane power source and the load to 280mA for MAX5911 and 415mA for MAX5912. After startup, the FET is fully enhanced to reduce its on-resistance. To ensure robust operation, the MAX5911/MAX5912 contain built-in safety features that prevent damage to the internal FET. They include an enable input, which responds to positive logic signals (+3.3V or +5V), allowing the host system to disconnect the load. ENABLE is also used to reset the device after a latching fault condition occurs.

The MAX5911/MAX5912 Simple Swapper™ hot-swap ICs monitor four parameters for these fault conditions: undervoltage lockout (UVLO), power-not-good, zero-current detection, and thermal shutdown. These devices are available in the extended temperature range, -40°C to +85°C. The MAX5911 and MAX5912 come in 8-pin and 16-pin SOIC packages, respectively.

关键特性
  • 以下关键特性由Maxim美信半导体提供：
  • Provides Safe Hot Swap for -16V to -65V Power Supplies
  • 280mA Current Limit for MAX5911
  • 415mA Current Limit for MAX5912
  • Zero-Current Load Disconnect
  • Integrated Power FET
  • Status Output Reports Fault Condition
  • Internal Switch-Protection Circuitry
  • Built-In Thermal Shutdown
  • DGND Can Vary Up to ±5V with Respect to AGND
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