onsemi

STK621-728-E

STK621-728-E Description

The STK621-728-E is a half bridge driver IC designed for high-performance power management applications. Manufactured by onsemi, this device is part of the Power Management (PMIC) category and is housed in a 21SIP through-hole package. It features a half bridge output configuration with a peak output current of 20A, making it suitable for driving inductive loads such as AC motors. The STK621-728-E operates within a supply voltage range of 12.5V to 17.5V and can handle a maximum load voltage of 400V. Despite being marked as obsolete, it remains a reliable choice for applications requiring robust fault protection and advanced features.

STK621-728-E Features

The STK621-728-E offers several unique features that enhance its performance and reliability in demanding applications. Key features include:

• Auto Restart: Ensures continuous operation by automatically restarting the device after a fault condition is cleared.
• Bootstrap Circuit: Facilitates the efficient operation of the high-side switch, enabling the driver to handle high voltage levels.
• Status Flag: Provides real-time feedback on the operational status, aiding in system diagnostics and monitoring.
• Current Limiting and UVLO (Under Voltage Lockout): These fault protection mechanisms safeguard the device against overcurrent and undervoltage conditions, ensuring reliable operation and longevity.
• Logic Interface: Simplifies integration with control systems by providing a straightforward logic interface for command and status communication.

STK621-728-E Applications

The STK621-728-E is ideally suited for applications requiring robust power management and control, particularly in the realm of AC motor drives. Its ability to handle high inductive loads and provide reliable fault protection makes it a preferred choice for:

• AC Motors: Ideal for driving AC motors in various industrial and commercial applications, ensuring efficient and reliable motor control.
• Power Supplies: Suitable for use in power supply units where high current handling and precise control are necessary.
• Industrial Automation: Enhances the performance of automated systems by providing reliable power management and control for inductive loads.

Conclusion of STK621-728-E

The STK621-728-E stands out as a reliable and feature-rich half bridge driver IC, offering significant advantages over similar models. Its robust fault protection mechanisms, advanced features like auto restart and bootstrap circuit, and compatibility with inductive loads make it a versatile choice for a wide range of applications. Despite its obsolete status, the STK621-728-E remains a valuable component for engineers and designers seeking high-performance power management solutions.