The LD1185 is a low‑power, triple‑output triac phase‑angle controller IC with built‑in soft‑start, described in this datasheet.
The LD1185 integrates a positive‑feedback function to generate trigger pulses for controlling the firing angle of a three‑terminal bidirectional triac, enabling stable speed control of universal motors. Typical applications include handheld power tools, vacuum cleaners, mixers and dimmers.
Key features include direct connection to 220 V/50 Hz or 110 V/60 Hz AC mains, minimal external components, soft‑start and fault monitoring, low quiescent current (6 mA), and a DIP14 or SOP14 package. Detailed pin descriptions, electrical parameters, and example circuits are provided. This manual is written in Chinese.
| Supply voltage | 220 V/50 Hz or 110 V/60 Hz AC |
|---|---|
| Quiescent current | 6 mA |
| Operating temperature range | 0 °C to +70 °C |
| Package | SOP14 or DIP14 |
It can be powered directly from a 220 V/50 Hz or 110 V/60 Hz AC mains supply.