The NCP1000 through NCP1002 series of integrated switching regulators combine a fixed frequency PWM controller with an integrated high voltage power switch circuit. This chip allows for simple design and minimal parts count for very low cost applications which utilize an ac input. This chip is designed to power a single ended topology, typically a discontinuous mode flyback, with secondary side sensing. The internal high voltage switch circuit and start-up circuit can function in continuous operation over a wide range of inputs, from 85 Vac to 265 Vac, and thus can be used in any existing power system in the world. Though inexpensive, these devices include a number of features such as undervoltage lockout, over-temperature protection, bandgap reference, and leading-edge blanking that make them an excellent value.
The NCP1000 through NCP1002 series are integrated switching regulators that combine a fixed frequency PWM controller with an integrated high voltage power switch circuit. These devices are designed for simple, low-cost applications utilizing AC input, typically powering a single-ended topology like a discontinuous mode flyback converter with secondary side sensing. The internal high voltage switch and start-up circuit allow for continuous operation over a wide input range of 85 Vac to 265 Vac.
| Input Voltage Range | 85 Vac to 265 Vac |
|---|---|
| On-board Power Switch Voltage | 700 Volt |
| Drain Voltage Range | -0.3 to 700 V |
| Peak Drain Current (NCP1000) | 2.0 A |
| Operating Junction Temperature | -40 to 125 °C |
| Oscillator Frequency (Typical) | 100 kHz |
| Current Limit Threshold (NCP1001) | 0.84 to 1.08 A |
The typical oscillator frequency is 100 kHz at 25°C.
The maximum operating junction temperature is 125°C.
No, the device has no minimum load requirement.