Intersil's latest product is the first 60V synchronous buck controller that can bypass the intermediate buck conversion stage used in traditional industrial applications. The low duty cycle (minimum on-time of 40ns) of the ISL8117 synchronous buck PWM controller can realize direct buck conversion from 48V to 1V load point. The company said that this technological achievement allows designers to reduce system complexity and solution costs in industrial, factory automation, medical and communications infrastructure applications.
In high-voltage applications that require lower output voltages, designers traditionally rely on modules that increase system cost, or rely on two-level DC-DC solutions to increase the solution footprint and complexity. The ISL8117 controller provides a cost-effective and reliable alternative for applications where Vout and Vin are relatively low. The ISL8117 uses valley current mode modulation with adaptive slope compensation to achieve stable operation of a variety of Vin and Vout combinations without the need for external compensation. System designers can also use the adjustable frequency of ISL8117 up to 2MHz to optimize power supply cost, size and efficiency.
The innovative ISL8117 reduces the solution footprint and simplifies the design without affecting performance. Compared with competing solutions, the default design values of common functions and the wide Vin and Vout of the ISL8117 reduce the number of external components. With ISL8117, engineers can design a complete DC-DC step-down conversion solution containing only 10 components of MOSFETs and passive components, and achieve up to 98% conversion efficiency with 1.5% output voltage accuracy. The low pin count and layout-friendly pin architecture of the ISL8117 also minimizes the number of overlapping traces, thereby further improving power supply performance.
Mark Downing, senior vice president of infrastructure and industrial power products at Intersil, said: "The ISL8117 buck controller meets the growing demand for direct POL conversion from extremely high input voltages (such as 48V to 1V output)." Support light load efficiency mode 'S unique capabilities are essential in industrial applications and make ISL8117 a better alternative to existing solutions based on old technology. "
Main features and specifications 1 – The wide input voltage range of 4.5V to 60V covers all standard input rails, including 5V, 12V, 24V, 36V, 42V and 48V 2 – The wide voltage output range can be configured from 0.6V to 54V 3 – minimum Time is tight, can provide very low duty cycle power, and does not require a two-stage solution in many applications. 4-Programmable switching frequency from 100kHz to 2MHz can be synchronized to reduce radiated system noise and avoid beat frequency problems 5-Complete fault protection ensures long-term reliability, including overvoltage, undervoltage, overcurrent and overheating 6-High FET driver and the current mode of operation ensures that the DEM retention efficiency at all load levels 7-- adjustable soft start, having a pre-bias and support, may be implemented on starting order of the plurality ISL8117
ISL8117 Intersil high voltage controller may be associated with low-dropout Voltage regulators (eg ISL80136, ISL80138, ISL80101A) are used in combination with integrated FET switching regulators (ISL8023 / 24 or ISL8016) to support high-power power rails in typical process control industrial applications. The company said that ISL8117 is now available in 4mm x 4mm QFN and 6.4mm x 5mm HTSSOP packages.
