Infineon Technologies Introduces Second Generation of Integrated Power ICs - CoolSET F2 Family Enables Design of Simple and Efficient Switched Mode Power Supplies
The products of the CoolSET F2 family have been designed for use in light and cost-efficient power supplies offering optimized efficiency and high reliability. These applications include battery chargers for mobile phones and portable devices, adapters for organizers and digital cameras; printers and fax machines; DVD players and set-top boxes; as well as auxiliary power supplies, which are used in applications such as personal computers or washing machines.
CoolSET F2 products enable manufacturers of Switched Mode Power Supplies (SMPS) to develop devices of high reliability and simple design which offer comprehensive protection features for output power ranging from 10 W up to 47 W (VAC (in) = 85 V...265 V) or 60 W (VAC (in) = 190 V...265 V). The on-resistance values RDS (on) of the CoolMOS power MOSFETs, which are the lowest in the industry, allow high-performance SMPS of utmost efficiency offering low power dissipation and reduced footprint. The reduced heat allows SMPS design without conventional heatsinks, as the circuit boards copper area is sufficient to carry the heat.
Compared to components produced in standard power MOSFET technology, devices in CoolMOS technology reduce the area-specific resistance RDS (on) by a factor of five, says Dr. Reinhard Ploss, head of business group Automotive & Industrial at Infineon Technologies. It is Infineons goal to offer intelligent power management and supply solutions which substitute heatsinks in the long term.
CoolSET F2 solutions are available with drain-source breakdown voltages of both 650 V and 800 V, for output currents of 1 A to 3 A. The primary voltage ranges from 85 V to 265 V.
Using CoolSET F2 products reduces the time-to-market of power supplies corresponding with the European Unions new power guidelines on improved efficiency in power-packs and adapters particularly in stand-by mode.
Monitoring, Protection and Power-Saving Measures
The CoolSET F2 family incorporates comprehensive monitoring, protection and power-saving measures. These include Current Mode Control with integrated overshoot-minimizing, MOSFET temperature sensing via internal sensors for immediate shutdown by the trigger circuit in case of critical depleting-layer temperature (thermal shutdown), and an integrated under-voltage lockout function (UVL) to prevent destruction of the CoolMOS by incorrect triggering-voltage levels.
An external shunt gives the designer greater flexibility and higher precision in dimensioning the main components of a SMPS. This results in optimized (smaller) transformers and output diodes, and in reduced load on the power semiconductor. A user defined softstart function provides a smooth power-on at startup and auto restart to increase lifetime of the main components of a SMPS (e.g. MOSFET, output diode). An extended pulse duty factor in the CoolMOS triggering signal allows to be used optionally in either Discontinuous Current Mode (DCM) or Continuous Current Mode (CCM). The Leading Edge Blanking function, which is also integrated, ensures safe power-on of the CoolSET, both in standard situations and at auto restart, for example after a short-circuit situation on the output side. Additional protection functions are Over Current Protection (OCP), Open Loop Protection (OLP) and Over Voltage Protection (OVP) all including auto restart. Due to the integration, fewer external components can be used enabling implementation of more compact SMPS designs and lower costs of the whole system.
In addition, the components of the new CoolSET F2 generation allow the standby power to be reduced to less than 300 mW (for 40 W applications) in so-called no load condition, that is with 0 W output power. This is achieved by lowering the frequency gradually as the load on the output decreases. An applied burst mode allows even further reduction of standby power. This energy-saving concept (frequency reduction and applied burst mode) has been implemented without an additional connection pin, and with no external wiring.
Development Support, Prices and Availability
The CoolSET F2 evaluation package contains application documentation, samples, data sheet, demo-board, demo-board description, Excel-based PC calculation software, and PSpice models.
The CoolSET F2 family derivatives ICE 2A165, ICE 2A265, ICE 2A365, and ICE 2A280 are available in sample quantities. In quantities of 10,000, the component ICE 2A365 (47 W maximum output power at 85 V...265 V primary voltage), for example, is priced at Euro 0.95.
Further information on Infineons CoolSET F2 generation at www.infineon.com/coolset/.
Infineon Technologies AG, Munich, Germany, offers semiconductor and system solutions for applications in the wired and wireless communications markets, for security systems and smartcards, for the automotive and industrial sectors, as well as memory products. With a global presence, Infineon operates in the US from San Jose, CA, in the Asia-Pacific region from Singapore and in Japan from Tokyo. In the fiscal year 2000 (ending September), the company achieved sales of Euro 7.28 billion with about 29,000 employees worldwide. Infineon is listed on the DAX index of the Frankfurt Stock Exchange and on the New York Stock Exchange (ticker symbol: IFX). Further information is available at www.infineon.com
Infineon Technologies' new CoolSET F2 family: Power MOSFET and PWM Control IC on a single chip for easy and efficient SPS design up to 60 W.Press Picture
JPG | 856 kb | 1535 x 1063 px