Datasheet
The NCP101X series integrates a fixed-frequency current-mode controller and a 700V MOSFET, suitable for low standby-power offline SMPS. It features soft-start, frequency jittering, short-circuit protection, skip-cycle, maximum peak current setpoint, and dynamic self-supply.
Datasheet
This document introduces NCP101X series products. The series integrates a fixed frequency current mode controller and a 700 V MOSFET. It is housed in a PDIP-7, PDIP-7 Gull Wing, or SOT-223 package. It provides soft start, frequency jittering, short circuit protection, skip cycle, a maximum peak current setpoint and a Dynamic Self-Supply (no need for an auxiliary winding). The switching frequency is 65-100-130 kHz. When the current setpoint falls below a given value, e.g. the output power demand diminishes, the IC automatically enters the so-called skip-cycle mode and provides excellent efficiency at light loads. No acoustic noise takes place. Short-circuit detection takes place when the feedback signal fades away, e.g. in true short-circuit conditions or in broken Optocoupler cases. External disabling can be easily done either simply by pulling the feedback pin down or latching it to ground through an inexpensive SCR for complete latched-off.
