Insulated gate driver expands the freedom of inverter drive circuit design

As a power element gate driver for various inverters such as industrial inverters, UPSs, and power conditioners for photovoltaic power generation, we have provided a wide range of TLP350. In a medium-to-high power system using this TLP350, buffer transistors were placed in front of the gates of IGBT/MOSFET, and the buffer-driven analogue timing designs were overloaded. In addition, the protection circuits for the power elements had to be designed individually.

The new-product TLP5231 released to reduce the burden of these designs has the following features.

• Buffer MOSFET and soft turn-off MOSFET are externally configured to simplify timing-design.
• Microcomputer design is easy because restart from abnormal interruption is automatic
• It can be operated simply by adjusting the external MOSFET according to the capacitance of the power elements, and can be platformized in basic circuit designing deployment.
• The fault signal is fed back when the power supply voltage is abnormal (UVLO [Note 1]) and when an overcurrent is detected.
• The soft turn-off function from overcurrent detection allows power device to be shut off more softly than normal off operation.
• Prevents breakdown of power elements by suppressing surge voltage rises that occur during abnormal shut-off

As described above, there is a merit of reducing the burden on the designer, so please be sure to consider TLP5231 when miniaturizing/enhancing the functionality including the gate driver peripheral circuits.

Here is the function comparison of TLP5231 and TLP350 introduced above.

Here is the comparison of IGBT drive circuit of TLP5231 and TLP350 introduced above.

• Here for gate pre-driver coupler
• Look for photo couplers and photo relay products

• Industrial inverters
• Uninterruptible power supply
  
• PV Inverter for Household Use