onsemi MUR1620CTG Ultrafast Rectifier: Datasheet, Pinout, and Application Circuits
The MUR1620CTG from onsemi is a high-efficiency, ultra-fast rectifier diode designed for high-frequency power conversion applications. Part of the renowned MUR series, this component is engineered to deliver superior performance in demanding environments, making it a popular choice in switch-mode power supplies (SMPS), inverters, freewheeling diodes, and other high-speed rectification circuits. Its key attributes include an ultra-fast recovery time, low forward voltage drop, and high current capability, which collectively enhance system efficiency and reliability.
Datasheet Overview
The MUR1620CTG is a 16A, 200V ultrafast rectifier. Critical specifications from its datasheet include:
- Repetitive Peak Reverse Voltage (VRRM): 200V
- Average Forward Current (IF(AV)): 16A
- Peak Forward Surge Current (IFSM): 150A
- Forward Voltage Drop (VF): Typically 0.975V at 8A
- Reverse Recovery Time (trr): A remarkably fast 35ns (typical)
This ultra-fast recovery time is one of its most significant features, as it drastically reduces switching losses in high-frequency circuits. The device is also characterized by its soft recovery switching, which helps minimize electromagnetic interference (EMI). The component is offered in a TO-220AB package, renowned for its excellent power dissipation capabilities and ease of mounting to a heatsink.
Pinout and Package
The MUR1620CTG is packaged in the industry-standard TO-220AB package. The pinout is straightforward:
- Pin 1 (Anode): The positive terminal of the diode.
- Pin 2 (Cathode): The negative terminal of the diode, connected to the metal tab.
- Pin 3 (Anode): The second anode terminal, internally connected to Pin 1.
The metal tab is electrically connected to the cathode (Pin 2). Therefore, for safety and proper operation, this tab must be isolated from the heatsink using an insulating kit if the heatsink is at a different potential.
Application Circuits
1. Switch-Mode Power Supply (SMPS): The MUR1620CTG is ideally suited for use as a output rectifier in high-frequency SMPS. Its fast recovery ensures high efficiency by minimizing reverse recovery current, which is crucial for modern, compact power supplies.
2. Freewheeling Diode: In inductive load circuits, such as those found in motor drives or relay controllers, this diode is used across inductive loads to provide a path for the current to decay when the driving switch turns off, protecting the switch from voltage spikes.
3. Reverse Battery Protection: It can be implemented in series with the power input line to prevent damage from reverse polarity connection. Its low forward voltage drop ensures minimal power loss in this configuration.
4. Boost and Buck Converters: The diode is a critical component in these DC-DC converter topologies, where it rectifies the switched voltage to provide a regulated DC output.
In summary, the onsemi MUR1620CTG stands out as a robust and highly efficient ultrafast rectifier essential for modern power electronics. Its excellent combination of a high current rating, low VF, and extremely fast trr makes it a superior choice for designers aiming to optimize performance, reduce energy loss, and improve the thermal management of their systems. Whether for industrial, automotive, or consumer applications, this component delivers the reliability and speed required for next-generation designs.
Keywords:
Ultrafast Rectifier, Reverse Recovery Time, Switch-Mode Power Supply (SMPS), Freewheeling Diode, TO-220AB Package
