The AP2191D from Diodes Incorporated is a high-performance, single-channel current-limited integrated high-side power switch optimized for Universal Serial Bus (USB) and other hot-swap applications. This power switch is designed to operate between 2.7V and 5.5V, making it suitable for a wide range of products powered by USB interfaces, including portable and consumer electronics.

Key Features

• Current Limiting: The AP2191D provides precision current limiting to protect the host device from overcurrent conditions. It helps to prevent damage to USB ports by controlling the amount of power delivered to connected devices.
• Fast Response Time: With its built-in quick output discharge and fast response time to fault conditions, the AP2191D ensures reliable operation and protection for both the power switch and the USB port.
• High Accuracy: The device features a high accuracy current limit, which allows for consistent and safe power distribution to connected devices without the risk of overcurrent damage.
• Thermal Shutdown Protection: The AP2191D includes thermal shutdown protection that prevents overheating, thereby enhancing the safety and longevity of the product.
• Controlled Rise Time: The controlled rise time reduces inrush current, which is beneficial in applications where multiple devices are connected, and power management is critical.
• Reverse Current Blocking: This feature prevents current from flowing backward into the source, which is essential for protecting the power source and other components in the system.

Applications

The AP2191D is ideal for a variety of applications where power distribution and protection are critical. Its typical applications include:

• USB Peripherals and Devices
• Portable Electronic Devices
• Battery-Charging Circuits
• Power Supply Distribution
• Hot-Swap Power Management

The AP2191D is a reliable and versatile power switch that offers enhanced protection features for electronic devices. Its robust design and precise current limiting make it an excellent choice for designers looking to incorporate safe power management into their USB-powered applications.