.gif)
.gif)
New Products
October 29, 2012
16V Step-down DC/DC Converters Feature Internal Drivers
The Torex XC9246/XC9247 series are 16V step-down DC/DC converters with an internal driver transistor. The output voltage can be set within the range 1.2V to 5.6V using the 1.0V (±1.5%) internal reference voltage and external resistors. The soft-start time is set internally to 1.5ms (TYP.) and this can be adjusted externally using a resistor and capacitor connected to the EN/SS pin.
Recommended: Ericsson Delivers 750W Quarter-Brick using Proprietary HRR Topology
The switching frequency is a high 1.2MHz, enabling the use of small external components. The bootstrap method is employed and the Hi side driver is N-ch to reduce chip area, making it possible to house the IC in a SOT-26W or small USP-6C package. Small peripheral components and a compact package also mean less mounting area is needed, contributing to improved efficiency/thermal performance. It can replace a 3-pin regulator.
PWM control (XC9246) or PWM/PFM auto switching control (XC9247) can be selected for the operation mode. The XC9246 series is PWM control, and the XC9247 series is PWM/PFM, which automatically switches from PWM to PFM during light loads and provides high efficiency, high load response, low voltage ripple, can be achieved over a wide range of load conditions.
Related: Tiny Kinetis KL02 Microcontrollers from Freescale Now Broadly Available
Internal protective circuits include a current limiting circuit, thermal shutdown, and short-circuit protection circuit. An internal UVLO function that forcibly turns the driver Tr. off at the detection voltage level or lower is also provided. This series is an environment-friendly product that complies with the EU RoHS Directive and is Pb-free.
XC9246/XC9247 Series Features
Opinion: Power Struggle — Getting the Most Out of Your PSU through Enhanced Design Solutions
* PFM control achieves high efficiency at light loads
* A small coil and ceramic capacitors can be used
* Can replace a 3-pin regulator
* Internal current limiting circuit, thermal shutdown, and short-circuit protection circuit
* Internal UVLO function (forcibly turns off driver Tr. at the detection voltage level or lower)
Share this story
Send via E-mail
Post to Twitter
On the Web:
White Papers
March 11, 2013
Power Modules for Charger Applications
Sponsored by Vincotech
February 27, 2013
The Adaptive Cell Converter Topology Enables Constant Efficiency Over Universal Input AC Line in Front-End, High-Density Power Factor Correction Applications
Sponsored by Vicor Corp.
February 27, 2013
From 48 V direct to Intel VR12.0: Saving "Big Data" $500,000 per datacenter, per year
Sponsored by Vicor Corp.
More White Papers
- Ericsson Delivers 750W Quarter-Brick using Proprietary HRR Topology
- IXYS Introduces an Anode-Gated Thyristor Technology Platform
- Dreamliner Nightmares a Factor in New UL Standards Activities for Li-ion Batteries
- Ideal Diode Bridge Controller Minimizes Rectifier Heat and Voltage Loss
- Siemens Installing Regenerative Energy Storage Unit on Light Rail Line
- Silicon Labs acquires Energy Micro for IoT, Smart Energy and Portable Electronics
- NXP Brings High Efficiency to 12V MR16 Lamps with Dimmable LED Controller
- Ultra-Compact High-Efficiency Power Supplies for Automotive Applications
- Curtis Industries Acquires California-based Tri-Mag
- Convection-Cooling Eliminates Fan Maintenance and Audible Noise in 250W Power Supplies
- Siemens Installing Regenerative Energy Storage Unit on Light Rail Line
- Ericsson Delivers 750W Quarter-Brick using Proprietary HRR Topology
- Single-Stage LED Drivers Deliver Dimming and Thermal Protection with Lower BOM Cost
- Convection-Cooling Eliminates Fan Maintenance and Audible Noise in 250W Power Supplies
- ABB Demonstrates Technology to Power Flash Charging Electric Bus in 15 Seconds
- GE Intros Megawatt UPS Global Platform with Industry-Leading Efficiency
- Dreamliner Nightmares a Factor in New UL Standards Activities for Li-ion Batteries
- Dow Corning adds Thermal Management Options Optimized for Electronics Applications
- ICCNexergy Adds Line of Lithium-Iron-Phosphate Batteries for Medical Carts
- Sungrow Presents New PV Inverters Again at Intersolar 2013
- Green Building Power Forum 2010: Fujitsu Components America
- Darnell's Digital Power Forum 2009: CUI Incorporated
- Green Building Power Forum 2010: EMerge Alliance
- Green Building Power Forum 2010: Anderson Power Products
- Green Building Power Forum 2009: Independence Station
- Darnell's Digital Power Forum 2009: Coilcraft
- Darnell's Digital Power Forum 2009: Champs Technologies
- Darnell's Digital Power Forum 2009: EXAR Corporation
- Darnell's Digital Power Forum 2009: PMBus
- Darnell's Digital Power Forum 2009: Power Plaza
Design Features
October 22, 2012
Energy Efficiency with Class D Amplifier Modules
Class-D switching amplifiers are helping audio designers create personal multimedia devices and home audio/visual systems that demonstrate how compact and stylish equipment can also deliver high sound quality and high audio output power. The key to this breakthrough, providing freedom from the large and bulky boxes housing traditional audio products, lies in the class-D amplifier’s high energy efficiency, which is typically around 90%. This allows designers to reduce or eliminate heatsinks as well as using smaller-sized PCBs and smaller components such as transformers, connectors and power supplies.
Design Features
October 8, 2012
The Role of Hall Effect Sensors in Power Distribution Infrastructure
Power distribution units (PDUs) form an essential part of modern computing and data communications hardware. They provide multiple outputs for transferring electrical power with maximum efficiency, controlling the power capacity and safeguarding against the possible causes of supply interruption. With an ever increasing need from tech savvy consumers for higher data throughput and greater quantities of data storage capacity, as well as tough international legislation now governing CO&sub2; emissions, the demands being placed on these units are proving challenging for engineering teams to satisfy.
Product Focus
August 13, 2012
The Year in AC-DC Power Supply Technology
The past year witnessed significant new product releases, technological developments, and industry news related to the field of AC-DC Power Supply technology.