Utility Systems Technologies    Watervliet, NY 12189
Apr 12, 2013 Current Balancer is designed for 3-phase motor applications where power source is supplying unbalanced current, causing excessive heat, and potentially premature failure. Using high-speed electronic tap switching design, unit precisely adjusts voltage which in turn will balance current to within 3% or less. Housed in NEMA-3R enclosure for outdoor installations, balancer is suited for submersible pumps used in municipalities supplying water in rural areas.

DigiTec    Newell, WV 26050
Sep 23, 2010 Rugged ARM Series microprocessor-based controllers evenly distribute runtime by automatically alternating lead and lag loads between 2 pump sequences. Devices include inrush delay to prevent both loads from energizing simultaneously, and five UL913 intrinsically safe low-voltage/-current control switch inputs. Integral device logic allows outputs to function if one input fails to open or close, while hand-off-automatic switches enable manual operation if needed.

ON Semiconductor, LLC    Phoenix, AZ 85008
Jun 15, 2010 Consisting of 8 linear programmable constant current sources, NCV7680 is designed for regulation and control of solid state rear combination lamps of vehicles. It supports LED driving current of up to 75 mA/channel as well as different brightness levels for stop and tail illumination. Operating in temperatures from -40 to +150°C, it has MSL 1 moisture resistance rating and is available in SOIC-16 Pb-free package. Unit also allows designers to set output current with one external resistor.

Watlow    St. Louis, MO 63146
Apr 27, 2010 Designed to control Tungsten lamps, EZ-ZONE® ST offers single-phase, solid-state relay output from 40-75 A and phase angle power switching with soft-start to prevent high in-rush currents, load failure, or blown fuses. It also has temperature control, current monitoring, overtemperature protection, and field communications for banks of lamps used to create PV cells. Internal communications bus provides entry point for configuration/monitoring or location to access multiple controllers.

National Semiconductor Corp.    Santa Clara, CA 95051-0695
Apr 27, 2010 Featuring 4 individual current regulator channels and input voltage up to 80 V, PowerWise® LM3464 drives up to 4 strings of LEDs with up to 20 LEDs per channel. High-voltage current controller works in conjunction with external N-channel MOSFETs and sense resistors to accurately drive current to each LED string. Dynamic headroom control feature monitors forward voltages of LED strings and dynamically adjusts LED supply voltage through power supply feedback to lowest level required.

Newport Corp.    Irvine, CA 92606
Mar 18, 2010 Offering stability for use with TO-can laser diodes and butterfly packages, Model 6100 provides precision current and temperature control for laser diode applications. Its 500/1,500 mA current supply range, along with 32 W temperature controller, suits demanding laboratory tasks. Bench top instrument incorporates DSP-based PID control and ultra-stable current control to achieve less than 0.001°C temperature stability and 1.3 µA (rms) ripple, respectively.

Linear Technology Corp.    Milpitas, CA 95035
Jun 26, 2009 Available in 6-pin ThinSOT(TM) package, H-grade version of LTC3803-3 current mode flyback DC/DC controller can be powered by input ranging from 9-75 V. Unit maintains 300 kHz operating frequency and offers adjustable slope compensation for optimized transient response with minimum output capacitance, and soft-start function that minimizes inrush current/output voltage overshoot. Operating in -40 to +150°C temperatures, IC features 40 µA start-up and 240 µA quiescent current.

Maxon Precision Motors    Fall River, MA 02720
Apr 17, 2009 Measuring 54 x 28 x 9 mm, Model EPOS2 36/2 controls brush DC motors as well as brushless EC motors, and is suited for single-axis and multiple-axis applications of miniature size. Plug-in module can be operated as speed controller or current controller in addition to position controller. Providing 36 V, 2 Amp operation, drive is designed to command and control within CANopen network, but can also communicate via USB or RS232 interface.

National Semiconductor Corp.    Santa Clara, CA 95051-0695
May 19, 2008 Featuring programmable switching frequency up to 500 kHz, LM5118 emulated current-mode-controlled buck-boost DC-DC regulator controller offers smooth transition between buck and buck-boost modes. It features 2-switch configuration, peak efficiency of 95%, and operates from 12.6 V battery, but also functions if voltage falls momentarily down to 4 V. Drivers for high-side buck MOSFET and low-side boost MOSFET are included as well as current limit, thermal shutdown, and enable input.

Allegro MicroSystems Inc.    Worcester, MA 01615
Nov 06, 2007 Designed for camera auto focus and zoom applications, Model A3904 features 2.4-5.5 V operating voltage range, 127 mA maximum output current, and -40 to +85°C operating temperature range. Output current is programmed via I²C interface in 500 µA increments with clock rates up to 400 kHz, while I2C inputs set internal DAC output voltage used as reference for linear current control using MOSFET output sink transistor.

Winkle Industries    Alliance, OH 44601
May 01, 2007 Designed to replace traditional contactors and discharge resistors, OptiCon magnet controllers utilize solid-state IGBTs that provide true control of electrical current to magnets. Three models, rated for 150, 250, and 350 A service, can be installed into new equipment or retrofit into existing systems. Each can be used with any magnet or magnet system, optimizing power delivered to magnet while minimizing excess heat. Controllers also eliminate occurrence of damaging voltage spikes.

RKC Instrument    South Bend, IN 46628
Aug 17, 2006 With 0.2% accuracy, DIN rail mount SRZ Control System provides selectable position proportional control, cascade control, as well as heat only and heat/cool control. True universal input includes 10 thermocouple types, RTD, voltage, or current. Single module may provide up to 4 channels of heat only or 2 heat/cool to which up to 16 modules may be connected. Alarm choices include loop break, heater break, and interlock. Communications are provided via serial Modbus RTU.

American Aerospace Controls, Inc. (AAC)    Farmingdale, NY 11735
Jun 05, 2006 Non-intrusive, isolated current-sensing Series 882 incorporates 2 A output relay switch with LED to indicate on/off status, enabling detection of AC current overload or underload to prevent damage. Relay also enables series to turn on alarm, shut down electrical system, and provide automatic warning alerts. Controllers are available in 12 current ranges from 0.2-1 A through 300 A, with 5-terminal barrier, 0.75 in. pass-thru hole, and operating temperature of -4 to +158°F.

Micronor    Newbury Park, CA 91320
Dec 21, 2005 Able to automate existing systems, MR267 remotely controls motorized potentiometer and/or rotary cam switch via 4-20 mA current loop, 0-2.5 V input, or external potentiometer. User-specified potentiometers provide absolute positional feedback information or function as variable resistor in analog control or bridge circuit. Rotary limit switches are programmed, via cams, to electrically control events or provide status at pre-stages.

ON Semiconductor, LLC    Phoenix, AZ 85008
Feb 04, 2005 Current Mode Controllers Series NCP1230 and NCP1231 allow power supply designers to shut-down power factor correction stage in light or no-load conditions. Units offer cycle skipping at light loads, internal ramp compensation, and frequency dithering. Both series are available in 65, 100, and 133 kHz frequency options. Series NCP1230 integrates 2.5 ms soft-start, while Series NCP1231 offers adjustable soft start and brown out function.

Vishay Siliconix    Santa Clara, CA 95054
Nov 05, 2004 Series SiP280x PWM Controllers serve as building blocks for converters in offline and dc-to-dc current-mode switching power supplies. Operating from 5 V with start-up and operating currents of 100 and 500 µA, respectively, controllers offer switching frequencies up to 1 MHz. They include internal soft-start mechanism and blanking function, which eliminates need for external filter components. Units are built on BiCMOS process and available in SO-8 or TSSOP-8 package.