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UVLO stands for Under Voltage Lock Out and refers to the undervoltage lockout function. During operation, if the power supply voltage drops and becomes lower than the UVLO detection voltage, UVLO brings the internal circuit into a semi-standby state to prevent malfunction. When the power supply voltage rises and becomes higher than the UVLO release voltage, UVLO is released and the operation restarts.
When operating a power device such as IGBT, if the gate voltage of the controlled power device drops, conduction loss increases, causing a loss increase and device destruction. A gate driver IC coupler for pre-driving such a power device may incorporate the UVLO function to control the above phenomenon.

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