BD6581GU is a white LED driver IC with a PWM step-up DC/DC converter and a maximum current driver. It can provide a maximum boost of 42.5V and a maximum driving current of 25mA. The wide and precise brightness can be controlled by external PWM pulse. BD6581GU has very accurate current drivers, and it has few current errors between each strings. So, it will be helpful to reduce brightness spots on the LCD. Small package type is suited for saving space.
The BD6581GU is a white LED driver IC designed for backlight applications such as notebook PCs, portable DVD players and car navigation systems. It can drive up to 72 LEDs (12 in series, 6 strings in parallel) and features a compact package for space‑constrained designs.
Key features include a high‑efficiency PWM step‑up DC/DC converter (fsw = 1 MHz, up to 93 % efficiency), accurate 6‑channel current drivers with ±1.5 % matching, and multiple safety functions such as over‑voltage protection, over‑current limit, SBD open detection and thermal shutdown.
| Operating supply voltage range | 2.7 V ~ 22.0 V |
|---|---|
| Operating temperature range | -30 °C ~ +85 °C |
| Maximum LED current per channel | 25 mA |
| Maximum efficiency | 93 % |
| Switching frequency | 1 MHz |
It can drive up to 72 white LEDs (12 in series, 6 strings in parallel).
It operates from –30 °C to +85 °C.