MV1001SC

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6.3 Abnormal heat buildup

The MV1001SC incorporates thermal shutdown. If the junction temperature (Tj) of the IC reaches the thermal shutdown

stop temperature (approx. 150ºC), thermal shutdown is activated, and oscillation stops. If Tj falls about 50ºC from the stop

temperature, the IC will reset automatically.

If heat buildup occurs in a component other than the IC, the protection will not be activated. Install a separate protection

circuit, if necessary.

6.4 CS pin open-circuit

If the CS pin open-circuit occurs, Vcs will increase due to the internal pull-up current and remain above the CS pin

reference voltage. The IC will therefore operate with the minimum on-time Ton_min, and Io will decrease.

6.5 CS-GND short-circuit

The IC will be unable to perform peak current detection at the CS pin and will operate with the maximum on-time

Ton_max. As Io increases, install a separate protection circuit, if necessary.

6.6 Current detection resistor open-circuit

The source of MOSFET will float, and MOSFET operations will become unstable. If the MOSFET switches off, Io will

approach zero. However, if the MOSFET is on, overvoltage will be applied to a CS pin, resulting in potential damage to the

IC. Install a separate protection circuit, if necessary.

6.7 Current detection resistor short-circuit

Vcs will become nearly equal to GND, and the IC will operate with the maximum on-time Ton_max. As Io increases,

install a separate protection circuit, if necessary.

CAT.No.1A0102-1E