The NCP1050-NCP1055 are high voltage switching regulator series with startup circuit, which eliminates the need for transformer auxiliary bias winding, and has overcurrent protection. It can be used in 8-pin dual-in-line and 4-pin SOT-223 packages.
The NCP1050 through NCP1055 are monolithic high voltage regulators designed to enable end product equipment compliance with low standby power requirements. These devices operate directly from a rectified AC line source (85 V to 265 V) and provide output power ranging from 3.0 W to 40 W depending on the input configuration.
The series features an active startup regulator circuit that eliminates the need for an auxiliary bias winding, along with fault detection, programmable timer protection, and a unique gated oscillator configuration for fast loop response. Available in 8-pin dual-in-line and 4-pin SOT-223 packages, they include on-chip power switch circuits rated up to 700 V.
| Drain Voltage Range | -0.3 to 700 V |
|---|---|
| Operating Junction Temperature | -40 to +150 °C |
| Oscillator Frequency (A Suffix) | 38 kHz to 47 kHz (Typical 42.5 kHz) |
| Thermal Shutdown Temperature | 140 °C to 160 °C |
In flyback converter applications, they provide an output power ranging from 6.0 W to 40 W with a fixed AC input of 100 V, 115 V, or 230 V.
No, the series features an active startup regulator circuit that eliminates the need for an auxiliary bias winding on the converter transformer.
The devices offer oscillator frequency options of 44 kHz, 100 kHz, and 136 kHz.