NCL37733
impedance every time it starts−up and after DRV pulses
• Die Over Temperature (TSD)
are terminated by the 36 ms maximum on−time. If the
measured impedance does not exceed 170 W typically,
the circuit stops operating. In practice, it is
recommended to place a minimum of 500 W in series
between the CS pin and the current sense resistor to
take into account possible parametric deviations.
The circuit stops operating if the junction temperature
(T ) exceeds 150°C typically. The controller remains
J
off until T goes below nearly 100°C.
J
• Pin connection faults
The circuit addresses most pin connection fault cases.
In particular, the circuit detects the CS pin short to
ground situations by sensing the CS/ZCD pin
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