UVLO function support

Many gate driver photocouplers have a UVLO (Under Voltage Lock Out) function to prevent malfunction at low voltages. This function stops the output of the coupler until the power supply voltage of the gate driver coupler reaches the UVLO release voltage, such as when the power supply is turned on, and prevents malfunction of the power device during the start-up of the input voltage. When the power supply voltage drops during operation and drops below the UVLO detection voltage, the operation stops.
This function prevents the power device from being underdriven. When the power supply voltage rises and exceeds the UVLO release voltage, the UVLO is released.

img_igbtMosfet_03e
Part of an inverter circuit
img_igbtMosfet_04e
UVLO operation examples

VUVLO+: UVLO release voltages. When the power supply voltage of the coupler exceeds this voltage, the output of the coupler returns.

VUVLO-: UVLO detection voltages. When the coupler power supply voltage drops below this voltage, the coupler output stops.

Gate Driver Photocouplers

Related information

Contacts

Technical inquiry

Contact us

Contact us

Frequently Asked Questions

FAQs

Queries about purchasing, sampling and IC reliability

Stock Check & Purchase

keyword:

Disclaimer for External Link
Through this website you are able to proceed to the website of our distributors ("Third Party Website") which is not under the control of Toshiba Corporation and its subsidiaries and affiliates (collectively "Toshiba"). The Third Party Website is made available to you as a convenience only and you agree to use the Third Party Website at your own risk. The link of the Third Party Website does not necessarily imply a recommendation or an endorsement by Toshiba of the Third Party Website. Please be aware that Toshiba is not responsible for any transaction done through the Third Party Website, and such transactions shall be subject to terms and conditions which may be provided in the Third Party Website.
A new window will open