The Silan SB42511 manual provides specifications, pinout, operation and application guidelines for the 1 A white LED driver with PWM dimming.
The SB42511 is a buck‑type LED driver chip that integrates a power MOSFET, PWM dimming, temperature and over‑current protection. It operates over a wide input voltage range and can deliver up to 1 A of constant current to white LEDs while maintaining high efficiency.
The document contains a description of the chip’s features, electrical parameters, pin configuration, functional operation (including PWM dimming and current limiting), component selection advice, typical application circuits, electrical characteristic curves and package dimensions. This manual is written in Chinese.
| Maximum output current | 1 A |
|---|---|
| Input voltage range | 5 V – 25 V |
| Switching frequency | 280 kHz |
| Efficiency | ≥ 90 % |
| Internal MOSFET resistance | 0.25 Ω |
| PWM dimming | Supported |
| Operating temperature range | -40 °C – 125 °C |
| Package | SOP‑8‑225‑1.27 |
The chip can deliver up to 1 A of output current.
It operates with an input voltage from 5 V to 25 V.
The chip operates at a fixed switching frequency of 280 kHz.