YB1518 is a step-up DC-DC converter white LED driver from yobon, it can drive up to 9 LEDs in series, the input voltage range is 2.7V-16V
The YB1518 is a compact step‑up DC‑DC converter designed for white LED backlighting in portable devices. It operates from a wide input range of 2.7 V to 16 V and can drive up to nine white LEDs at 3.4 V VIN, providing uniform brightness without external ballast resistors.
Key features include a fixed switching frequency of about 1 MHz, <1 µA shutdown current, internal soft‑start, and latched over‑voltage protection up to 36 V. The device is supplied in a 5‑lead SOT‑23 package and is suited for LCD backlights, PDAs, GPS terminals, digital cameras, cellular phones, and other handheld applications.
| Input voltage range | 2.7 V – 16 V |
|---|---|
| Shutdown current | <1 µA |
| Switching frequency | ~1 MHz |
| Over‑voltage protection | 36 V |
| Maximum LED drive capability | Up to 9 white LEDs at VIN = 3.4 V |
The device operates from 2.7 V to 16 V input.
It can drive up to nine white LEDs when the input voltage is 3.4 V.
The shutdown current is less than 1 µA.
It switches at a fixed frequency of about 1 MHz.