The ISL81801 buck-boost controller acts like a “UPS on a chip” by enabling bidirectional current flow (forward or reverse) using constant-voltage and constant-current regulation. This allows a battery or supercapacitor to be charged and discharged using a single controller and power path.
The ISL81801’s combination of a 80V buck-boost switching frequency (600 kHz) and a small package (5mm x 5mm) lets designers create ultra-compact, high-density power solutions. Its wide 4.5V to 80V range is suitable for many common applications, including 48V motor drives, telecom, industrial battery backup systems, and solar power.
The ISL81802 is a single-chip, 80V dual-phase synchronous buck controller with integrated drivers. It is the industry’s only 80V buck controller capable of 1MHz switching frequency, enabling the use of small power supply inductors to improve power density.
For higher power applications, multiple ISL81802s can be paralleled and interleaved with best-in-class transient response.
The ISL81802 can generate either two independent outputs, or a single high-current output, allowing creative power supply engineers tremendous flexibility and IP re-use across platforms.
In addition, the capability to supply either a constant output voltage or a constant current opens up a wide array of end-user applications, ranging from LED drive to powering blowers to maximize airflow in dense data centre systems.
