The EL7630 is a high efficiency, constant frequency PWM regulator for use in white LED driving applications. With efficiencies up to 86%, the EL7630 operates at 1.35MHz switching frequency while operating from an input voltage of between 2.7V and 5.5V. The maximum output voltage of 27V enables the EL7630 to drive up to 6 LEDs in series. It is also possible to use the EL7630 to drive LEDs in series/parallel combination for applications requiring up to 15 LEDs. Available in the 6 Ld SC-70 and the 5 Ld TSOT packages, the EL7630 features the same pinout as competitive products but offers higher efficiency, constant frequency operation. It is specified for operation over the -40°C to +85°C ambient temperature range.
The EL7630 is a constant‑frequency PWM regulator designed for white LED driving applications. It operates from a 2.7 V‑5.5 V input and can boost up to 27 V, allowing up to six LEDs in series or up to fifteen LEDs in series/parallel configurations.
The device is offered in 6‑lead SC‑70 and 5‑lead TSOT packages, works over a –40 °C to +85 °C temperature range, and features 1.35 MHz (≈1.2 MHz) switching frequency with up to 86% efficiency. Detailed electrical specifications, typical application circuits, and PCB layout guidelines are provided.
| Input voltage range | 2.7 V to 5.5 V |
|---|---|
| Maximum output voltage | 27 V |
| Efficiency | up to 86 % |
| Switching frequency | 1.35 MHz (constant) |
| LEDs in series (max) | 6 |
| LEDs total (series/parallel) | up to 15 |
| Operating temperature range | -40 °C to +85 °C |
| Package types | 6‑lead SC‑70, 5‑lead TSOT |
The EL7630 can drive up to six LEDs in series.
It operates from 2.7 V to 5.5 V input.
The regulator uses a constant‑frequency of about 1.35 MHz (≈1.2 MHz).
Efficiencies of up to 86 % are reported.