LM3526 - 双端口 USB 电源开关和过流保护

LM3526是TI德州仪器公司的一款固定限流开关产品，LM3526是双端口 USB 电源开关和过流保护，本站介绍了LM3526的封装应用图解、特点和优点、功能等，并给出了与LM3526相关的TI元器件型号供参考。

LM3526 - 双端口 USB 电源开关和过流保护 - 固定限流开关 - USB电源和充电端口控制器 - 德州仪器

产品描述

The LM3526 provides Universal Serial Bus standard power switch and over-current protection for all host port applications. The dual port device is ideal for Notebook and desktop PC's that supply power to more than one port.

A 1 ms delay on the fault flag output prevents erroneous overcurrent reporting caused by in-rush currents during hot-plug events.

The dual stage thermal protection circuit in the LM3526 provides individual protection to each switch and the entire device. In a short-circuit/over-current event, the switch dissipating excessive heat is turned off, allowing the second switch to continue to function uninterrupted.

The LM3526 accepts an input voltage between 2.7V and 5.5V allowing use as a device-based in-rush current limiter for 3.3V USB peripherals, as well as Root and Self-Powered Hubs at 5.5V. The Enable inputs accept both 3.3V and 5.0V logic thresholds.

The small size, low RON, and 1 ms fault flag delay make the LM3526 a good choice for root hubs as well as per-port power control in embedded and stand-alone hubs.

产品特性

Compatible with USB1.1 and USB 2.0
1 ms Fault Flag Delay Filters Hot-Plug Events
Smooth Turn-on Eliminates In-rush Induced Voltage Drop
UL Recognized Component: REF# 205202
1A Nominal Short Circuit Output Current Protects PC Power Supplies
Thermal Shutdown Protects Device in Direct Short Condition
500mA Minimum Continuous Load Current
Small SOIC-8 package minimizes board space
2.7V to 5.5V Input Voltage Range
140 m? Max. Switch Resistance
1 µA Max. Standby Current
200 µA Max. Operating Current
Under-voltage Lockout (UVLO)

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