The SP5618P is a high‑precision primary‑side feedback switching regulator IC for low‑power AC/DC chargers and adapters.
The SP5618P switching regulator IC uses primary‑side sampling to achieve accurate constant‑current and constant‑voltage control without the need for optocouplers or TL431. It is intended for low‑power AC/DC charger and adapter applications such as mobile phone chargers, PDAs, digital‑camera chargers, TVs and PC auxiliary supplies.
Key features include 5 % voltage and current accuracy across the full range, programmable output power via an external sense resistor, built‑in line‑drop compensation, soft‑start, front‑edge blanking, and a suite of protection functions (OCP, OVP, UVLO, over‑temperature). The device operates in PFM mode for constant‑current and PWM mode for constant‑voltage, with a typical switching frequency of 60 kHz. This manual is written in Chinese.
| Input voltage (VDD) range | 12 ~ 25 V |
|---|---|
| Soft‑start time | 10 ms |
| Recommended output power | 20 W |
| AC input voltage range | 85 ~ 264 V ac (230 V ac ±15%) |
The device operates with a VDD input voltage from 12 V to 25 V.
The recommended output power is 20 W.