Battery Charger IC
THE AAT3672 is a single-cell Li-Ion/polymer battery charger and system management IC. Using 3-switch architecture, the dual-path device enables simultaneous battery charging and system load management. In addition, the product automatically reroutes power from the battery to the system without interruption when load requirements exceed available current. Compatible with either an AC power adapter or a USB port power source, the product regulates battery charge current and voltage for 4.2-V Li-on battery cells. Battery charge current can be programmed up to 1.6 A. Qualified across the -40°C to +85°C temperature range, the AAT3672 is available in a 14-pin, 3-mm × 3-mm TDFN package. The IC sells for $0.95 in quantities of 1000.
Advanced Analogic Technologies Inc.
Santa Clara, Calif.
PSS Flyback Controllers
THE C2140 Series of primary-side-sensing (PSS) flyback controllers features a best-in-class current and voltage regulation of ±5% and targets high-volume, universal input applications rated up to 8 W. The parts also feature programmable cable compensation and switching-frequency adjustment. The C2141PX2 and C2142PX2 parts are rated at 4 W and 8 W, respectively, packaged in SOT23-6 and are available in volume. According to the company, the C2140 family eliminates the need for optocouplers and all secondary-side feedback circuitry, as well as any additional components that designers may need to specify to improve the current regulation from a typical PSS flyback design. In addition, the products use sophisticated algorithms combined with digital techniques to more accurately monitor the output voltage and provide tighter current regulation than has previously been possible, enabling quasi zero voltage switching. Other features include a programmable cable compensation of up to 10% to give tight voltage regulation at the end of the cable, while helping to minimize the copper content of the cable. The compensation is fully adjustable in the design phase, allowing one standard design to be quickly modified to accommodate different cable lengths or gauges. The controllers also can be adapted to match the required switching frequency of the end application by specifying one external component.
Cambridge, United Kingdom
THE ADP2121 is the industry's smallest 500-mA buck regulator, according to the company. Available in a 1.3-mm × 0.9-mm wafer-level chip-scale package (WLCSP) with a height of 0.6 mm, the 6-MHz device requires only two small capacitors and one small inductor, resulting in a 35% reduction in PCB area compared with current 3-MHz buck regulator solutions. The product also features the lowest-in-class FET on resistance, helping to maintain peak efficiency above 90%. In addition, the ADP2121 operates at input voltages ranging from 2.3 V to 5.5 V, meeting the requirements for single Li-Ion, Li-Ion polymer cell and multiple alkaline/NiMH cell applications. Fixed output voltage options are available at 1.8 V, 1.82 V, 1.85 V and 1.875 V. Priced at $0.80 per unit in 1000-unit quantities, samples of the buck regulator are available now in a 6-ball WLCSP.
Analog Devices Inc.
NiMH Charger IC
THE DS2710 is a stand-alone NiMH charger IC with alkaline-cell detection. Eliminating the need for circuit design or microcontroller programming, the device protects against system damage due to corrosive cell leakage, making it easy to add in-system NiMH charging to end equipment powered by AA or AAA batteries. Suitable for charging batteries from a USB port, the product's charge-control output regulates charge current using a switch-mode or linear control scheme. The device also offers comprehensive charge control for fast-charging NiMH cells, including precharge conditioning, negative-delta-V fast-charge termination and top-off charging. Voltage, temperature and charge-timer monitoring during all charge phases provides redundant secondary charge-termination methods for further protection against overcharge. Available in a 3-mm × 4-mm, 10-pin TQFN package, pricing for the DS2710 starts at $1.52 in quantities of 1000 and up. Samples are available now.
Maxim Integrated Products
Front-End Power Supplies
THE EFE Series of embedded front-end power supplies includes the 300-W EFE-300 and the 400-W EFE-400. Both single-output power supplies deliver 133% peak-power capability for 10 sec and offer efficiency of up to 90%. In addition, the products employ an 8-bit microcontroller for full digital control of the output and to handle housekeeping routines, resulting in a 25% parts count reduction to achieve a 45% smaller and up to 56% lighter design compared to competitive products. Power densities of up to 22 W/in.3 are achieved under peak-load conditions and 16.6 W/in.3 under continuous loading. Featuring a 1U profile, the EFE-300 measures 3 in. × 5 in. × 1.34 in., while the EFE-400 measures 3 in. × 6 in. × 1.34 in.
THE FAN2564 300-mA low VIN low-dropout regulator features a dropout of 100 mV and operates from supplies as low as 1.8 V. The regulator consumes low quiescent current (45µA at no load) and delivers a fast transient response. Available in either a 0.93-mm × 1.41-mm wafer level chip scale package (WLCSP) or 2-mm × 2-mm ultrathin MLP packaging, the FAN2564 uses industry-standard 0402 capacitors that measure 1.00 mm × 0.50 mm. In addition, the device uses Pb-free terminals and has been characterized for moisture sensitivity in accordance with the Pb-free reflow requirements of the joint IPC/JEDEC standard J-STD-020. Designed to meet the requirements of the European Union's directive on the restriction of the use of certain substances (RoHS), pricing for the FAN2564 in UMLP packaging is $0.63 and $0.69 for WLCSP packaging.
San Jose, Calif.
THE BSL600 Series of 1U-high high-density switching power supplies offers 600 W of output power in a 9.0-in. × 3.7-in. × 1.6-in. footprint. The series consists of six models with primary output voltages ranging from 12 V to 48 V and a secondary 5 V at 4-A output. The product also features universal AC input with active power factor correction; integral end-mount ball-bearing fans; 0°C to 50°C full-load operating temperature range; remote sense; remote on/off control; and power good signal. Options include reversing of status/control signals to accommodate hot-swap/redundant applications. RoHS-compliant, the product is safety approved to UL/cUL60950-1, CB EN60950-1 and bears the CE Mark (LVD). Standard 500-piece pricing starts at $194.
San Jose, Calif.
Programmable Power Supplies
THE WL9 Series of low-profile switching power supplies now includes higher voltage models with outputs to 135 Vdc. The supplies are available with an output-power rating of 720 W. In addition to models with “slot” output voltage ranges ±1 Vdc from the nominal, other models feature adjustment ranges from 0 Vdc to 5 Vdc and 0 Vdc to 135 Vdc. All products can be used to provide either a constant voltage or a constant current. Models with wide output-voltage ranges can be adjusted down to 0 V, and both voltage and current can be programmed with 0-V to 10-V control voltage inputs. Voltage and current-monitor outputs and an inhibit terminal are included on the pluggable connectors that enable easy wiring of the control and input leads. Provisions for N+1 redundancy and paralleling for higher current are optional. Other features include universal input, PFC, soft-start operation, VOUT OK indicator and no-load operation. Measuring 1.7 in. high, they can be mounted on a rack panel as small as 1U. Models with single outputs from 3.3 V/70 A to 135 V/5.3 A are priced at $775. Wide adjust models with ranges from 0 V to 5 V/70 A and 0 V to 135 V/3.7 A are priced at $800.
DC Servo Motors
PITTMAN BRAND Series 6000 brush-commutated dc servo motors measure 22 mm in diameter and feature a skewed five-slot armature design and bonded neodymium iron boron magnets. The longest of the three models measures 1.901 in. in length and can provide up to 40% more continuous torque (2 oz-in.), compared with shorter 22-mm-diameter electric motor products. Other motors in the series are offered in lengths of 1.256 in. and 1.556 in., with the ability to achieve continuous torque up to 0.80 oz-in. and 1.3 oz-in., respectively. Depending on the model, the motors can generate maximum peak torques up to 10.2 oz-in. and nominal no-load speeds up to 8720 rpm. Other features include sintered bronze bearings, two-pole stators, heavy-gauge steel housing, silicon steel laminations and copper graphite brushes. Standard options include ball bearings, EMI/RFI filter networks, and lead wire or terminal connection configurations. Planetary gearboxes can be specified to meet demanding speed and torque requirements, and optical encoders (with choices of resolution) can be added for position, velocity and direction feedback necessary in precision motion control applications. Custom motors can be developed.
AMETEK Technical & Industrial Products
THE TPS62601 6-MHz, 500-mA stepdown dc-dc converter is the first product of its kind to achieve a 13-mm2 solution size with an ultrathin 0.6-mm total height. The converter achieves up to 89% power efficiency and only 30-uA typical operating quiescent current from a 0.9-mm × 1.3-mm chip-scale package. The synchronous switch-mode device's fixed frequency of 6 MHz allows the use of only one 0.47-µH inductor and two low-cost ceramic capacitors. The product also delivers dc voltage-regulation accuracy of ±1.5%. Featuring a wide input-voltage range of 2.3 V to 5.5 V and 1.8 V of output, the device effectively supports single-rail voltage requirements. Pricing for the TPS62601 is $1.45 each in quantities of 1000 units.
Texas Instruments Inc.
THE MIL-COTS BCM bus converter offers efficiency of more than 95%. In addition, the sine amplitude converter (SAC) operates from MIL-STD-704E/F 270 Vdc and delivers an isolated 30.0 Vdc to 41.3 Vdc. This voltage is suitable as an input to the MIL-COTS PRM regulator and VTM current multiplier, and is also suitable for aircraft distributed power applications. The product achieves a power density of 829 W/in.3 in a V•I Chip package compatible with standard pick-and-place and surface-mount assembly processes. Because of its high conversion efficiency and safe operating temperature range, the BCM may not require a discrete heat sink in typical applications. Low junction-to-case and junction-to-lead thermal impedances assure low junction temperatures and long life. Available models include the VMB0004MFJ (J-lead version) and VMB0004MFT (through-hole version). The bus converter is priced as low as $105.75 each in OEM quantities.
V•I Chip Corp.
Pulsecap Tantalum Capacitors
AVX Corp.'s new high capacitance PulseCap capacitors are designed for applications such as PCMCIA/USB wireless express cards, where bulk capacitance is needed to boost transmitter power. These large-case-size tantalum products are rated at 2200 µF (2.2 mF)/6.3 V.A maximum case height of 2 mm makes them ideal for reduced-height applications. The “undertab” termination style — where traditional “J” leads are replaced by terminations that do not protrude outside of the outline of the case — increases volumetric efficiency and allows parts to be positioned very closely together, delivering significant space savings. PulseCap devices are RoHS compatible and capable of withstanding a soldering profile of 3× reflow at 260°C. Operating temperature range is -55°C to +125°C. Other applications include wireless data cards, metering and sensors. Pricing typically starts at $2.20 each and are available in volume with a typical lead time of 14 weeks.
Myrtle Beach, S.C.