Power Management I Product News


TDK-Lambda’s NV350 modular power supplies meet latest medical approvals


TDK Corporation has announced that the TDK- Lambda NV350 is now approved to IEC/EN 60601-1, ANSI/AAMI ES60601-1 and CAN/CSA-C22.2 No 60601-1- 08 3rd Edition medical safety standards – this is in addition to the current approval to the 2nd Edition, ensuring full safety approval for medical equipment is maintained during the transition period from 2nd to 3rd Editions. Typical medical applications for the NV350 include clinical diagnostic systems, medical imaging equipment, dialysis systems and medical lasers. The NV350 is also well-suited to meeting the ever increasing demands of the broadcast and instrumentation markets, as well as other applications, such as ATE, automation, routers, servers and security networks. “We are approved by the Underwriters Laboratories Inc. (UL) to 60601-1 3rd Edition, which helps us to ensure that our medical power supplies are tested and approved to the highest safety standards,” said Bob Taylor, Safety Engineering Manager at TDK-Lambda UK. The power supply manufacturer has actively participated in the Underwriters Laboratories Inc. (UL) ‘Clients Test Data Program’ (CTDP) and the IECEE CB Scheme SMT (Supervised Manufacturer’s Test) Program, which is now also under the supervision of UL, for over 16 years. Being on these programs allows TDK-Lambda to


Fairchild’s boosted Class-D amplifier helps to extend battery life


Longer battery life and high efficiency, driven by consumer demand for loud and clear speaker sound, are two key challenges designers face in designing for mobile devices. In response Fairchild Semiconductor has developed the FAB3103 2.3 watt class-D audio amplifier with integrated boost regulator and battery automatic gain control (AGC). Suitable for use in mobile handsets, smart phones, and tablets, as well as portable media players, the FAB3103 has an integrated boost regulator that allows for high audio output power over a power supply range of 2.5V to 5.2V from a 3.6V Li-Ion battery. At low power output, the device’s boost


use its own testing facilities to generate UL and CB safety reports and test data, this capability helps to reduce time and the accompanying costs for the safety approvals of its own AC-DC power supplies and DC-DC converters. In addition to 60601-1 3rd Edition, products in the NV350 range meet Class B conducted and radiated EMC EN55011 and EN55022 and are approved to EN/IEC/UL/CSA 60950-1 for general purpose applications and EN/IEC 61010-1 for laboratory and process control applications. In addition, all NV350 units carry the CE mark, according to the LV Directive, and come with a three-year warranty.


TDK-Lambda | www.uk.tdk-lambda.com


regulator automatically shuts down for greater efficiency and lower quiescent current consumption, resulting in longer battery runtime. The audio amplifier also features battery automatic gain control (AGC) that reduces gain when the power supply voltage is low in order to limit maximum power consumption, reducing distortion and preventing early device shutdown. Available in a 12-bump, WL-CSP, the


FAB3103 device also offers several protection features including short circuit protection, low


voltage shutdown, and click and pop suppression. Additionally, the low EMI design of the device allows for filterless operation with high noise rejection using differential audio inputs, improving sound quality.


Fairchild Semiconductor | www.fairchildsemi.com


LNBR voltage regulator IC for satellite TV receivers


New ultra miniature power MOSFETs for portable devices


Renesas Electronics has unveiled eight new low-loss P- and N-channel power metal-oxide-semiconductor field-effect-transistor (MOSFET) products that have been optimised for use in portable electronics including smartphones and tablets. Featuring low loss (low on- resistance), the new devices include the 20 V (VDSS) µPA2600 and the 30 V µPA2601, equipped in ultra- compact 2 mm ◊ 2 mm packages they are able to deliver increased power efficiency and miniaturization within smaller mobile device form factors. With the increasing popularity of high-


functionality smartphones demand is increasing for smaller, thinner form factor devices with lower power consumption that enable longer battery life between charges. To meet these demands, designers are turning to power MOSFETs that feature lower on-resistance for use in charge/discharge control, RF power amplifier on/off control, and overcurrent cutoff switches, while supporting large currents. The µPA2600 and µPA2601 MOSFETs look to meet these demands for further miniaturization and low on-resistance while reducing mounting areas in a wide variety of applications, including load switches (which turn power applied to ICs on or off) and charge/discharge control in portable devices and on/off control and overcurrent cut-off switches in RF power amplifiers (amplifiers for high-frequency signals). A variety of device types, with differing voltages and polarities, such as power MOSFETs, are required to match the specifications of power


18 April 2012


Allegro MicroSystems Europe has announced a new addition to its family of LNBR (low-noise block regulator) ICs for use in satellite receivers and LCD TV “combo” receivers. The A8303 uses small ceramic capacitors rather than electrolytic devices to provide a lower- profile solution, as well as incorporating a key output voltage setting (15.6 V) to accommodate Japan-specific design requirements. The device is a single-channel LNBR IC that offers industry-leading internal protection and robustness, an integrated boost MOSFET, current sensing, and compensation which simplifies the design and minimises component count and PCB size. The A8303 has a low supply current to save energy, incorporates a high level of diagnostics, and features a resistor-programmed output current


limit to minimise the boost inductor/diode size and hence costs.


The A8303SESTR-T is available in a 4 ◊ 4 TQFN/MLP-20 package.


Allegro Microsystems | www.allegro.com


TI unveils integrated power controller for automotive applications


supplies used in portable devices, including smartphones. Key features of the new P-channel power


MOSFETs include: an on-resistance of 9.3 mΩ (typical value at VGSS=4.5 V) for the 20 V (VDSS) µPA2600 device and 10.5 mΩ (typical value at VGSS=10 V) for the 30 V µPA2601 device, enabling power savings in end-use products; a compact package that has reduced the mounting area by approximately 30 percent compared to existing 3 mm ◊ 2 mm packages, and the µPA2672 and similar products can reduce the mounting area by approximately 40 percent compared to existing 3 mm ◊ 3 mm packages; and comprising of eight devices, the new P- and N-channel power MOSFETs can support a variety of applications, including charge/discharge control, RF power amplifier on/off control, and overcurrent cut-off switches.


Renesas Europe | www.renesas.eu Components in Electronics


Texas Instruments (TI) has introduced a dual output power supply for automotive applications that provides stable, uninterrupted output voltages, even in cases where the input voltage drops significantly below the output voltage levels.


The start/stop function in many new car models increases fuel economy, but also leads to significant drops in the supply voltage when restarting the engine. The TPS43330-Q1 family remains fully functional during such voltage drops and ensures that applications continue to work without interruption or performance reduction. The devices’ ultra-low quiescent current makes the use of a separate standby voltage supply unnecessary, thus reducing system cost and complexity. Key features of the TPS43330-Q1 family include: a wide input voltage range of 2 V to 40 V and transients up to 60 V ensure continued operation, even under severe battery voltage conditions; and ultra-low quiescent current as


low as 35 uA and lower shutdown current of 5 uA that reduces the overall application power consumption from the battery in standby operation, extending battery lifetime and eliminating the need for a standby voltage regulator.


The integration of multiple voltage rails and voltage supervisors has helped to reduce board space, design complexity and system cost compared to a discrete solution.


Texas Instruments | www.ti.com www.cieonline.co.uk


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