The NCP1200 is a low-power current mode pulse width modulation controller from Onsemi, suitable for switch-mode power supplies, AC/DC adapters, and offline battery chargers.
The NCP1200CH/D is a general‑purpose offline power‑supply controller that operates in current‑mode PWM. It can be used for low‑power battery chargers, wall‑mounted AC/DC adapters, and other compact power solutions, offering built‑in short‑circuit protection and optional jump‑cycle mode for light‑load efficiency.
The document details pin assignments, electrical limits, oscillator frequencies (40 kHz or 60 kHz), overload protection behavior, and example circuits for a 4 W AC/DC wall adapter. Package dimensions for DIP‑8 and SO‑8 variants are also provided. This manual is written in Chinese.
| Supply voltage (VCC) | 16 V |
|---|---|
| Thermal resistance (junction‑to‑ambient) | 100 °C/W |
| Operating temperature range (TA) | -25 °C to +85 °C |
| Maximum junction temperature (Tjmax) | 125 °C |
| Storage temperature range (Tsta) | -60 °C to +150 °C |
| ESD rating (machine model) | 200 V |
| Oscillator frequency options | 40 kHz or 60 kHz |
| Peak current capability | 110 mA |
The internal oscillator can be set to a fixed frequency of either 40 kHz or 60 kHz.