The TLP7820 is a high-speed photovoltaic MOSFET driver from Toshiba Semiconductor and Storage. It is designed for driving MOSFETs and IGBTs in various applications, including power supplies, motor control, and industrial equipment. The device offers high isolation voltage and high-speed switching performance, making it suitable for demanding applications requiring electrical isolation between the control circuit and the power circuit.

Applications

• Power supplies: Used in isolated power supplies for driving the MOSFETs in the primary or secondary side.
• Motor control: Implemented in motor drives to control the switching of IGBTs or MOSFETs, providing electrical isolation and fast switching speeds.
• Inverters: Employed in inverter circuits for renewable energy systems (solar, wind) and UPS (uninterruptible power supplies).
• Industrial equipment: Utilized in industrial automation systems for driving power devices in PLCs (programmable logic controllers) and other control equipment.
• Medical equipment: Found in medical devices requiring high isolation and reliable switching.

Features

• High isolation voltage: Offers a high isolation voltage (typically 5000 Vrms) between the input and output, ensuring safety and preventing ground loops.
• High-speed switching: Provides fast turn-on and turn-off times, enabling efficient switching and reduced power losses.
• Low input current: Requires low input current to activate the output, reducing power consumption in the control circuit.
• Wide operating temperature range: Operates over a wide temperature range, making it suitable for various industrial environments.
• Compact package: Available in a small package size for space-constrained applications.
• RoHS compliant: Complies with RoHS directives, ensuring environmental friendliness.

Benefits

• Improved safety: High isolation voltage enhances safety by preventing electrical shock and ground loops.
• Increased efficiency: Fast switching speeds minimize power losses and improve overall system efficiency.
• Reduced power consumption: Low input current reduces power consumption in the control circuit.
• Enhanced reliability: Robust design and wide operating temperature range ensure reliable performance in harsh environments.
• Smaller footprint: Compact package allows for integration into space-constrained applications.
• Compliance with environmental regulations: RoHS compliance ensures environmental friendliness.

Additional Details

The TLP7820 typically consists of an LED on the input side and a photovoltaic MOSFET driver on the output side. When current flows through the LED, it emits light, which is converted into voltage by the photovoltaic cells. This voltage then drives the gate of the external MOSFET. Key specifications include the isolation voltage, input forward current, output voltage, and switching speeds. Understanding these parameters is crucial for proper design and application of the device.