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What does the Undervoltage-Lockout (UVLO) circuit of a Pulse-Width Modulator controller do?

April 26, 2017circuit controller Modulator pulse-width

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What does the Undervoltage-Lockout (UVLO) circuit of a Pulse-Width Modulator controller do?

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The undervoltage-lockout (UVLO) circuit sets the minimum operational dc input voltage of the pulse-width modulated (PWM) controller. There are two UVLO thresholds. When the UVLO turn-on threshold is exceeded, the PWM controller turns ON. If dc input voltage falls below the UVLO”s lower turn-off threshold, the PWM controller turns off.