Home Consumer Electronics Excessive Performing Bidirectional Buck-Increase DC-DC Controllers

Excessive Performing Bidirectional Buck-Increase DC-DC Controllers

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The excessive energy buck controllers obtain dependable efficiency for 48V telecom, information centre and industrial purposes

For supporting additional voltage margin wanted by information centre servers, 48V telecom and rugged industrial tools, a brand new pair of progressive 80V DC-DC controllers have been launched. 

The ISL81801 buck-boost controller acts as a “UPS on a chip” by enabling bidirectional present circulation (ahead or reverse) utilizing constant-voltage and constant-current regulation. This permits a battery or supercapacitor to be charged and discharged utilizing a single controller and energy path. 

The ISL81801 combines 80V buck-boost switching frequency (600 kHz) and small package deal (5mm x 5mm) that lets designers create ultra-compact, high-density energy options. Its huge 4.5V to 80V vary is ideal for a lot of frequent purposes, together with 48V motor drives, telecom, industrial battery backup techniques and solar energy.

Key Options of the ISL81801 Buck-Increase DC-DC Controller

  • Vast enter voltage vary of 4.5V to 80V
  • Vast output voltage vary of 0.8V to 80V
  • Programmable frequency from 100 kHz to 600 kHz with interleaved present sharing
  • Senses each optimistic and unfavorable inductor peak present
  • Intensive multilayer safety for overvoltage, overtemperature, common and peak present restrict on each outputs, undervoltage lockout, smooth begin and shoot-through safety for MOSFET drivers

The ISL81802 is a single-chip, 80V dual-phase synchronous buck controller with built-in drivers. It’s the trade’s solely 80V buck controller able to 1MHz switching frequency, enabling using small energy provide inductors to enhance energy density. 

For increased energy purposes, a number of ISL81802s will be paralleled and interleaved with a best-in-class transient response. The ISL81802 can generate both two impartial outputs, or a single high-current output, permitting energy provide engineers super flexibility and IP re-use throughout platforms. Moreover, the aptitude to provide both a relentless output voltage or a relentless present opens up a big selection of end-user purposes, starting from LED drive to powering blowers that maximise airflow in dense information centre techniques.

Key Options of the ISL81802 Twin-Part Buck DC-DC Controller

  • Vast enter voltage vary of 4.5V to 80V
  • Vast output voltage vary of 0.8V to 76V
  • Programmable frequency from 100 kHz to 1 MHz
  • Every output options an impartial smooth begin and precision output-enable controls
  • Intensive multilayer safety for overvoltage, undervoltage lockout, overtemperature, common and peak present restrict on each outputs, and shoot-through safety for MOSFET drivers

“The extremely built-in ISL81801 and ISL81802 obtain the best reliability efficiency and the flexibility to react shortly to transient masses with a minimal variety of BOM parts,” mentioned Philip Chesley, Vice President of the Industrial and Communications Enterprise Division at Renesas.

Mass manufacturing portions of the ISL81801 80V bidirectional 4-switch synchronous buck-boost controller and ISL81802 80V twin synchronous buck controller can be found now from Renesas’ worldwide distributors. They’re provided in 5mm x 5mm, 32-lead QFN packages and 38-lead, 4.4mm x 9.7mm HTSSOP packages.


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