Scalable multiphase architecture for interleaved buck DC-DC converters
12 March 2003
Power Electronics / Power Management
International Rectifier has launched XPhase, which it calls an extremely flexible and scalable architecture for multiphase, interleaved buck DC-DC converters requiring one or more phases. The first XPhase chip set consists of the IR3081 control IC and the IR3086 phase IC, and provides a high performance solution that exceeds the VRM or VRD/EVRD 10.0 requirements for the most advanced microprocessors used in servers and high-end desktop computers.
Unlike other multiphase solutions, which are limited in the number of phases they drive, this architecture enables a scalable multiphase design that accommodates the constant change and unpredictable nature of advanced CPU power requirements. The XPhase architecture consists of a control IC, which communicates with the phase IC using a simple 5-wire bus scheme. Phases can be added or removed without changing the fundamental design. The 5-wire analog bus consists of bias voltage, phase timing, average current, error amplifier output and VID voltage. By eliminating point-to-point wiring between the control and the phase ICs, the 5-wire bus shortens interconnections, cutting parasitic inductance and noise and thus improves PCB layout.
The IR3081 control IC in the 28-lead MLPQ package contains all one-per-converter circuitry, including voltage identification (VID) pull-up resistors, PWM ramp oscillator, error amplifier, bias voltage, fault detection and other necessary functions.
The IR3086 phase IC in the 20-lead MLPQ package drives and monitors a single phase in a multiphase converter. The IR3086 phase IC includes all one-per-phase circuitry that includes gate drivers, PWM comparator and latch, over-voltage protection, and current sensing and sharing and programmable VRHOT over temperature detection.
For more information contact Avnet Kopp, 011 809 6100, [email protected], www.avnet.co.za
Further reading:
Power efficiency and robustness in electronics design
Power Electronics / Power Management
Mouser Electronics recently announced a new eBook in collaboration with Analog Devices highlighting essential strategies for optimising power systems.
Read more...
USB Type-C-powered controllers
Future Electronics
Power Electronics / Power Management
Diodes Incorporated has released two USB Type-C PD 3.1 extended power range sink controllers that can be embedded into battery-powered devices.
Read more...
Multicell battery monitoring
Altron Arrow
Power Electronics / Power Management
The LTC6811 from Analog Devices is a multicell battery stack monitor that measures up to 12 series connected battery cells with a total measurement error of less than 1,2 mV.
Read more...
Full telemetry in tiny DC-DC converters
RS South Africa
Power Electronics / Power Management
The FS160* series of µPOL DC-DC converters from TDK all offer full telemetry, provide increased performance, and are remarkable for extraordinary power density in the smallest sizes.
Read more...
Power IC supplies 1650 W
EBV Electrolink
Power Electronics / Power Management
Power Integrations has announced a two-fold increase in power output from the HiperLCS-2 chipset with the new device now being able to deliver up to 1650 W of continuous output power.
Read more...
High-voltage step-down DC-DC converter
Altron Arrow
Power Electronics / Power Management
The MAX17793 is a high-efficiency, high-voltage, synchronous step-down DC-DC converter with integrated MOSFETs operating over an input voltage range of 3 to 80 V.
Read more...
High-voltage contactors
RS South Africa
Power Electronics / Power Management
TDK Corporation has announced two new additions to its high-voltage contactor portfolio for harsh environments: the HVC43MC with integrated mirror contact and the HVC45 with enhanced short-circuit current handling capability.
Read more...
Chokes rated at 36 A
RS South Africa
Power Electronics / Power Management
TDK Corporation has launched the EPCOS SurfIND series, a new range of current-compensated ring core double chokes for high currents and surface mounting.
Read more...
RF arrestor provides robust protection
RFiber Solutions
Power Electronics / Power Management
NexTek’s range of coaxial RF surge and lightning arrestors are designed and built to provide robust protection for any radio or coaxial RF transmission application.
Read more...
Wide-Bandgap Developer Forum 2025
Power Electronics / Power Management
To give designers the ultimate in design flexibility, the entire range of WBG power semiconductors will be provided including discretes, modules, and highly integrated solutions ranging from 40 V to 700 V for GaN and 400 V to 3,3 kV for SiC.
Read more...
printer friendly version