60V synkron buck-controller simplificerer design af strømforsyninger
Intersils nye 60V synkrone buck-controller, ISL8117, eliminerer behovet for 'intermediate' powerkonverteringstrin i industrielle applikationer (in english).
Intersil has nnounced the first 60V synchronous buck controller able to bypass the intermediate step-down conversion stage traditionally employed in industrial applications. The ISL8117 synchronous step-down PWM controller’s low duty cycle (40ns minimum on time) enables the direct step-down conversion from 48V to a 1V point-of-load.This technical achievement makes it possible for designers to reduce system complexity and solution cost in industrial, factory automation, medical and communications infrastructure applications.
In high voltage applications where a lower output voltage is required, designers have traditionally relied on modules that increase system cost, or two stage DC/DC solutions that increase solution footprint and complexity. The ISL8117 controller offers a cost-effective and reliable alternative for applications where Vout to Vin ratio is low.
The ISL8117 uses valley current mode modulation with adaptive slope compensation to enable stable operation for a wide range of Vin and Vout combinations, with no external compensation required. System designers can also use the ISL8117’s adjustable frequency up to 2MHz to optimize power supply cost, size and efficiency.
The innovative ISL8117 reduces solution footprint and simplifies design without compromising performance. Default design values for commonly used functions and the ISL8117’s wide Vin and Vout reduce the number of external components compared to competing solutions.
With the ISL8117, engineers can design a complete DC/DC buck conversion solution with only 10 components, including MOSFETs and passives, and achieve up to 98% conversion efficiency with 1.5% output voltage accuracy. The ISL8117’s low pin count and layout friendly pin architecture also minimizes the number of overlapping traces, further improving power supply performance.
- The ISL8117 buck controller addresses a growing need for direct POL conversion from very high input voltage such as 48V to 1V output, says Mark Downing, senior vice president of Infrastructure and Industrial Power Products at Intersil.
- The unique ability to support light load efficiency mode is critical in industrial applications and makes the ISL8117 a much better alternative than existing solutions based on older technology.
