Power Management I Product News Digital controller provides real-time adaptive loop compensation
Powervation, a pioneer in adaptive digital power management IC solutions that increase system efficiency, improve field reliability, and accelerate time to market, has unveiled the company's new dual phase digital DC/DC controller with Auto- Control.
Auto-Control is believed to be the first and
only real-time adaptive loop compensation solution currently available. This patented digital control loop technology looks to optimise the
trade-off between dynamic performance and system stability on a cycle-by-cycle basis without requiring any noise injection or other drawbacks of part-time measurement techniques. This is a key advantage for designs that drive imprecise or variable loads, and addresses the challenges associated with power supply component parameter drift that occurs over temperature and time. The approach also relieves power supply designers of the burden of compensation, plant characterisation, and reduces total design iterations.
The device, the PV3012, delivers voltage
precision of ±0.5% over line, load, and the full - 40°C to 125°C temperature range. The converter's output can be configured from 0.6 V to 5.5 V using PMBus commands or with an external resistor to access standard and DOSA set-point tables. Phases may be automatically added or removed as the load varies, maximizing efficiency over the load range. Additionally, with
ZMDI launches easy-to-use Single-Phase Digital
Point-Of-Load (POL) chipset ZMD AG (ZMDI), a asupplier of energy-efficient analogue and mixed-signal solutions has entered the smart power management market with the launch of a configurable true-digital, high- performance PWM controller for non-isolated DC/DC POL supplies. The ZSPM1000 operates as synchronous step-down converter in a single-rail and single-phase configuration. In combination with the ZSPM9000, ZMDI’s ultra-
compact MOSFET with integrated power-stage driver, the ZSPM1000 enables smart digital POL solutions for area constraint and high- performance applications such as servers, storage units, processor & FPGA boards, and others. “ZMDI’s true-digital Smart Power Management products are easy-to-use and enable the power engineer to quickly achieve a reproducible high-performance and optimised solution. While the device is running, optimizations can be made on the fly, which improves time-to-market of our customers,” explains Bernhard Huber, business line manager for standard components at ZMDI. “Compared to traditional pure analogue solutions, the digital
communication enables tremendous energy savings and thermal management benefits through system level integration. Power engineers will appreciate the way our Pink Power Designer design optimiser tool balances design trade-offs such as cost, size and efficiency and helps to quickly identify the optimal POL solution” The ZSPM1000 is able
to provide best-in-class transient performance, enabled by ZMDI’s Tru-
Sample technology. At the same time, ZMDI’s State-Law technique ensures a steady-state behaviour.
The device comes in a small standard package
currently available: a 24-pin QFN package of 4mm x 4mm.
The PC-based ZMDI Pink Power Designer
provides a user-friendly and easy-to-use interface to the device for communication and configuration. It guides the user through the design of the digital compensator and offers intuitive configuration methods for additional features such as protection and sequencing.
ZMDI |
www.zmdi.com
Sixteenth-brick low cost 30W DC/DC converter targets embedded datacom applications
Murata Power Solutions has announced the availability of the ULS series of open frame, PCB board mount 30 Watt isolated DC/DC converters. With a 2:1 input voltage range of 36 - 75 VDC (48 VDC nominal), these miniature "sixteenth- brick" DOSA compatible converters measuring just 33.27 x 23.11 x 8.13 mm (1.31 x 0.91 x 0.32 inches) are ideal for a wide range of datacom, telecom and industrial applications. The ULS series comprises two models offering either a 12 or 15 VDC output. The ULS-12/2.5- D48 12 VDC output model can provide up to 2.5 A output and is suitable for use in regulated intermediate bus applications. The 15 VDC model provides up to 2 A. The output may be trimmed within +10% to -20% of nominal Vout allowing the user to compensate for voltage losses. The series offers tight line and load regulation of +/-
34 October 2011
0.125% providing an extremely stable output without the need for any additional external components. An On/Off control input provides the choice of configuring for either negative or positive polarity. No minimum load is required. The series is rated at 2250 VDC input to output isolation ensuring that the end-application is protected from spikes, transients or other noise on the input. The converters are certified to UL/EN/IEC 60950-1 2nd edition safety approvals for IT and commercial equipment. Operating temperature range is from -40 to +85 degrees C. The ULS series includes many self-protection
features such as input under-voltage, output over voltage, over temperature shutdown, short-circuit and over-current "hiccup" autorestart. They are available in either DOSA standard
through-hole mount or surface mount package options.
Murata Power Solutions |
www.murata-ps.com
Components in Electronics
Powervation's Digital Stress Share (DSS) single- wire bus, multiple PV3012 devices can be connected in parallel to securely drive high current multi-phase loads.
The PV3012 is a system on chip solution based on a lean DSP/RISC dual-core architecture with a precision data acquisition engine running advanced Auto-Control algorithms in firmware - the result is a high performance and flexible voltage regulator equipped to manage the complex power needs of today's system designers. It is designed to work with all leading driver and FET solutions to allow the designer maximum flexibility.
This full suite PMBus compliant controller uses
full differential measurements and an 11 bit ADC to provide precision system telemetry of current, voltage, and temperature information, as well as comprehensive fault and warning reporting over SMBus interface. Additionally, to enhance system performance and reliability, PV3012 delivers
Two step-down DC-DC switching charger ICs for single cell Li-Ion batteries
austriamicrosystems has announced two new battery charger ICs for Li-Ion batteries in mobile devices. The AS3610/11 step-down DC-DC chargers offer fast and a highly efficient charging of Li-Ion batteries in mobile devices with up to 1.25 A output current. The ICs include numerous safety and protection features, internal current measurement, and USB Host/OTG (on the go) boost mode operation. The AS3610 DC-DC charger provides an I”C interface for external control and the AS3611 operates independently. The performance and features of the AS3610/11 make the charger ICs suited for applications that are powered by one Li-Ion battery. Such applications include high-end blood glucose meters, remote controls, GPS outdoor navigation or tracking equipment, mobile phones, e-dictionaries and e-book readers. The AS3610/11 switching charger ICs were designed with inputs from the handset and portable markets to use a high efficiency switch mode charger with minimum ripple. Implementation is simplified with most options and features controlled by pin strapping or OTP. These features include current limit set, charging current, OTG boost, and more. The AS3610 step-down charger also supports 900mA input current limitation for USB 3.0. Commenting Kammerlander, Product
Intersil's latest digital power module delivers 17 Amps
The ZL9117M is the latest member of Intersil's expanding power module family. The ZL9117M is a fully-encapsulated digital power module capable of delivering 17A output current. The device is configured using the industry's easiest- to-use, point-and-click PowerNavigator GUI. Built-in auto-compensation algorithms also optimise transient response over varying load conditions. The industry standard PMBus interface supports remote performance monitoring and even re-programming of installed systems around the world. A low profile 15mm x 15mm QFN package
provides an industry-leading power density of 1275W/in3. Very high efficiency, combined with a low thermal resistance of only 11 degrees C/W, eliminates the need for a heat sink or air flow in
most applications. Higher current demands are easily supported by paralleling modules with automatic current sharing. Key features include: a non-volatile memory
retains all configuration data; a PMBus interface provides real-time performance monitoring and control; auto-compensation which optimises transient response over varying load conditions; the device can be paralleled with current sharing for higher current applications and it has a conversion efficiency of up to 95%.
Intersil |
www.intersil.com www.cieonline.co.uk
Manager at Austria Microsystems said "The mobile industry asked for higher efficiency DC- DC chargers, with numerous options. These options enable the customer to re-use one design across a family of end product with minimal customization to support each model. The AS3610/11 features high current, low heat dissipation and all necessary safety features to safely give the end user the shortest possible charging time. Despite all these features, only a minimal number of external components are needed."
Other features austriamicrosystems' AS3610/11 switching chargers include: 22 V over-voltage protection; reverse polarity protection; chip and battery temperature supervision, and charger time-out supervision. The AS3610/11 is available in a small 3x3 mm MLPD14 package, and operates from a supply of 2.7 V to 5.5 V over a temperature range of - 40ºC to 85ºC. A WL-CSP package option is available for PCB space-critical applications.
austriamicrosystems |
www.austriamicrosystems.com
advanced digitally mapped temperature compensation of key parameters which enables current measurement precision of 3% over the full load range. The PV3012's anti-fuse based non-volatile memory (NVM) is specified from - 40°C to 125°C (20 year data retention rating) making the device suited to datacentres and base station applications. Users can configure and store up to eight configuration tables in NVM, which enables single resistor selection of one of eight device/application profiles, with considerable supply chain benefit. Designed to power ASICs, FPGAs, processors, and general POLs for networking, communications, server, storage, and advanced power module applications, the RoHS compliant PV3012 is sampling now in 32-lead QFN packaging.
Powervation |
www.powervation.com
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