High Performing 80V Bidirectional Buck-Boost and Dual-Phase Buck DC/DC Controllers for 48V Telecom and Rugged Industrial Equipment
Renesas Electronics has released a pair of high performing bi-directional buck-boost and dual-phase buck DC/DC controllers that provide extra voltage margin required for 48V telecom, data center, and industrial applications. ISL81801 buck-boost controller and ISL81802 single-chip, 80V dual-phase synchronous buck controller with integrated drivers are the latest additions that promise to achieve the highest reliability performance, and the ability to react quickly to transient loads with a minimum number of BOM components.
The ISL81801 buck-boost controller acts as a UPS on a chip as it enables bidirectional current flow (forward or reverse) using constant-voltage and constant-current regulation. The battery or supercapacitor can be easily charged and discharged using a single controller and power path. The 80V buck-boost switching frequency (600 kHz) and small package (5mm x 5mm) enables designers to create ultra-compact, high-density power solutions.
Features of the ISL81801 Buck-Boost DC/DC Controller
- Wide input voltage range of 4.5V to 80V
- Wide output voltage range of 0.8V to 80V
- Programmable frequency from 100 kHz to 600 kHz with interleaved current sharing
- Sense both positive and negative inductor peak current
- Extensive multilayer protection for overvoltage, over-temperature, average and peak current limit on both outputs, under-voltage lockout, soft start, and shoot-through protection for MOSFET drivers
The ISL81802 is a single-chip, 80V dual-phase synchronous buck controller with integrated drivers. The 80V buck controller is capable of 1MHz switching frequency, enabling the use of small power supply inductors to improve power density. Multiple ISL81802s can be paralleled and interleaved with the best-in-class transient response for higher power applications. It 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. The end-user applications of ISL81802 range from LED drive to powering blowers to maximize airflow in dense data center systems.
Features of the ISL81802 Dual-Phase Buck DC/DC Controller
- Wide input voltage range of 4.5V to 80V
- Wide output voltage range of 0.8V to 76V
- Programmable frequency from 100 kHz to 1 MHz
- Each output features an independent soft start and precision output-enable controls
- Extensive multilayer protection for overvoltage, under-voltage lockout, over-temperature, average and peak current limit on both outputs, and shoot-through protection for MOSFET drivers
The ISL81801 80V bidirectional 4-switch synchronous buck-boost controllers and ISL81802 80V dual synchronous buck controllers are undergoing mass production and are available now from Renesas’ worldwide distributors. They are supplied in 5mm x 5mm, 32-lead QFN packages, and 38-lead, 4.4mm x 9.7mm HTSSOP packages.
Note: More technical information can be found in the ISL81801 and ISL81802 datasheet linked at the bottom of this page and on the ISL81801 and ISL81802 product page.
