Overview of Diodes Incorporated AP2191DWG/SG

The AP2191DWG/SG is a high-performance, single-channel current-limited integrated high-side power switch from Diodes Incorporated, designed for USB and other hot-swap applications. This power switch is optimized for self-powered and bus-powered Universal Serial Bus (USB) applications.

Key Features

• Current Limiting: The device offers programmable current limiting to protect the USB port from overcurrent conditions. This feature ensures safe operation and extends the lifespan of both the port and the connected devices.
• Fast Transient Response: The AP2191DWG/SG is engineered to provide a quick response to fast transients, which helps in maintaining a stable power supply even under fluctuating load conditions.
• Thermal Shutdown Protection: With built-in thermal shutdown protection, the power switch prevents overheating, thereby safeguarding the circuit from thermal damage.
• Reverse Current Blocking: This feature prevents current from flowing backward into the source when the switch is powered off, protecting the source from potential damage.
• Controlled Rise Time: The AP2191DWG/SG ensures a controlled rise time, reducing inrush current and mitigating potential system voltage drops at startup.
• Under-Voltage Lockout (UVLO): The integrated UVLO function ensures that the device operates at the correct voltage levels, which is critical for maintaining the reliability and longevity of the system.

Applications

• USB Peripherals and USB Hubs
• Hot-Swap Supplies
• Portable Electronic Devices
• Battery-Charging Circuits
• Power Distribution Switches

Product Specifications

The AP2191DWG/SG is available in a small SOT25 package, which is ideal for space-constrained applications. It operates over a voltage range of 2.7V to 5.5V, making it suitable for low-voltage operations typical in USB-powered devices. The switch also features an active high enable input, allowing for easy control and integration into various system designs.

With its robust set of features and protections, the AP2191DWG/SG from Diodes Incorporated is an excellent choice for designers looking to enhance the safety and reliability of their USB power management systems.