Power Electronics

New Products

Low-Voltage MOSFETs

NEC Electronics America's NP Series of low-voltage power MOSFETs features an on-resistance of 2 mΩ. Featuring an innovative fabrication process and TO-263 packaging, the NP160N040TUG and NP160N04TDG reduce leakage current and efficiently manage heat dissipation. The devices double the number of bonding wires from two to four. The NP160N04TUG operates at a VGS of 10 V, and a VDS of 40 V, while the NP160N04TDG operates at a VGS of 5 V and 10 V and a VDS of 40 V. Pricing starts at $1.85 each in quantities of 1000.
NEC Electronics America
San Jose, Calif.


Inverter Power Modules

Eight solar inverter modules from Microsemi feature full-bridge configurations combining low-saturation IGBT top switches with fast nonpunch-through IGBT bottom switches for unipolar switching. The top IGBTs operate at line frequency, while the bottom IGBTs switch at frequencies from 15 kHz to 50 kHz. Housed in an SP3 package, this line of power modules includes five 600-V and three 1200-V models. Devices are available in one 600-V module that allow higher switching frequencies with minimum conduction losses.

Samples are available now. Prices range from $16.98 to $36.78 each in quantities of 1000 to 5000.
Irvine, Calif.


ESD-Protected MOSFET

The FDS881XNZ series of high-efficiency n-channel MOSFETs from Fairchild Semiconductor provides up to 8 kV of electrostatic discharge (human body model) voltage protection. Using the power-trench process, these low on-resistance MOSFETs reduce conduction losses and extend valuable battery life. They also provide rugged and robust avalanche and high peak current capability to ensure system safety by surviving unexpected voltage spikes that may afflict battery packs.

The series is housed in an SO-8 package. Units cost $1.18 each for the FDS8812NZ, $1.06 each for the FDS8813NZ and $0.75 each for the FDS8817NZ.
Fairchild Semiconductor
San Jose, Calif.


Full-Bridge Gate Driver for HID Lighting

The MX6895 from Micronix, a subsidiary of IXYS, is a high-voltage IC, full-bridge gate driver designed specifically for high-intensity-discharge Xenon lamps. The driver can operate from an output supply voltage of -80 V to -550 V, while providing 3.3-V to 12-V logic-compatible inputs. Requiring no external boost-related components, the driver features soft turn-on level translators that minimize electromagnetic interference effects to directly and reliably drive a MOSFET bridge network.

The MX6895 is offered in a thermally enhanced, 16-lead SOIC package.
Santa Clara, Calif.


Low-Noise LDO Regulator

With an input range of 1.8 V to 20 V, Linear Technology's 1.1-A LT1965 features a low dropout voltage of 300 mV at full load and adjustable output from 1.2 V to 19.5 V. Ultralow-output noise of only 40 µVRMS reduces noise in instrumentation, RF, DSP and logic supply systems, and is beneficial for post-regulating switching power supplies. Output tolerance is tightly regulated to within ±3% over line, load and temperature.

Available in DFN, MSOP, DD-Pak and TO-220 packages, pricing for the LT1965 ranges from $1.88 each to $2.20 each, depending on packaging, in quantities of 1000.
Linear Technology
Milpitas, Calif.


Stepdown Regulator

The S-8550/8551 Series from Seiko Instruments is a CMOS synchronous-rectification stepdown switching regulator that consists of a reference voltage circuit, an oscillator, an error amplifier, a phase-compensation circuit, a PWM controller, undervoltage lockout, a current-limit circuit and a power MOSFET. The oscillation frequency is high at 1.2 MHz.

Devices in the series are housed in a SOT-23-5 package. Pricing starts at $0.52 each in quantities of 10,000.
Seiko Instruments USA
Torrance, Calif.


Synchronous Buck Regulator

Micrel's MIC2238 is a 2.5-MHz dual 800-mA synchronous buck regulator with trickle-mode architecture for light-load efficiency in Li-ion battery-powered systems. The device offers an input-voltage range from 2.5 V to 5.5 V and a quiescent current of 28 µA at light loads.

The MIC2238 is available now in a 12-pin 3-mm × 3-mm MLF package. Pricing starts at $1.70 each in quantities of 1000.
San Jose, Calif.


Thermal Interface Pads

Keratherm 86/82 from MH&W International is a thermally conductive, electrically isolating silicone film with a reinforcing fiberglass layer for tear and cut-through resistance. Thermal impedance is 0.05 W/mK, and thermal conductivity is 6.5 W/mK. With its fiberglass layer, Keratherm 86/82 has a tensile strength of 20 N/mm2. The continuous-use temperature range is -40°C to +200°C. Keratherm 86/82 pads are available in a wide range of standard or custom configurations.

Pads are available in 0.25-mm (standard), 0.30-mm, 0.40-mm and 0.50-mm thicknesses. Volume pricing starts at $0.30/in2 for standard 86/22 material.
MH&W International
Mahwah, N.J.


Buck LED Driver

Catalyst Semiconductor's CAT4201 buck converter is optimized for driving high-brightness, 350-mA LEDs at up 94% efficiency. The device architecture allows an external RSET control resistor to preset a regulated LED current up to 350 mA from supplies as high as 24 V.

Additionally, built-in load-dump protection allows transients of 40 V, making the device suitable for automotive applications.

Housed in a 5-lead TSOT-23 package, the converter supports switching frequencies up to 1 MHz. The CAT4201 converter costs $0.72 each in 10,000 piece quantities.
Catalyst Semiconductor
Sunnyvale, Calif.


Hybrid Batteries

Maxell's CR17450 and CR17335 Lithium-Manganese-Dioxide cylindrical hybrid cells exhibit low self-discharge, making them ideal for life applications exceeding 10 years. The CR17450 has a typical capacity of 2600 mAh, while the CR17335 has a typical capacity of 1750 mAh. The cells have a voltage of 3 V and feature a stable sloping discharge curve at various depths of discharge, allowing for accurate prediction of end of life.

The CR17450 is 17 mm in diameter and 45 mm in length, with a weight of 22 g. The CR17335 is 17 mm in diameter and 33.5 mm in length, and it weighs 16 g.

The operational temperature range is -40°C to 80°C. Samples are available for $5.
Fair Lawn, N.J.


Nichrome Metal-Film Resistors

Members of the MLF series of surface-mount metal electrode face component resistors from Stackpole Electronics have a thin-film nichrome resistive element for excellent electrical characteristics, very low noise, precision and outstanding environmental stability. The MLF series of resistors is available in 0204- and 0207-size packages. Versions are available from 0.25 W to 1 W.

The MLF is capable of tolerances down to 0.1% and TCRs as low as 10 ppm. Pricing ranges from $60 to $600 for 1000 pieces.
Stackpole Electronics
Raleigh, N.C.


High-Voltage SMPS

HVPS switching-mode power supplies (SMPS) from Diversified Technologies replace very large 60-Hz transformer rectifiers, eliminate the parallel connection of smaller power supplies, and can be located at the point of load. Featuring a single rack that provides from 50 kW to 1 MW of output from 10 kV to 150 kV, each compact solid-state unit has a 30 in2 footprint and uses common tap water for cooling.

The units provide full overvoltage and overcurrent protection up to +30% or preset to ±0.1% maximum ripple and N+1 reliability. HVPS SMPS are priced from $85,000 to $225,000 each, depending on the model.
Diversified Technologies
Bedford, Mass.


Open-Frame Switchers

Astrodyne's ASL150 series of high-density, open-frame switching power supplies delivers 150 W of output power. These units exhibit power densities greater than 17 W/in3. All ASL150 Series models accept universal input from 90 Vac to 264 Vac. Four models are available that provide single outputs of 5 Vdc to 48 Vdc.

The ASL150 modules occupy a footprint of 2 in. × 4 in. × 1.08 in., and the ASL150 series features efficiencies up to 90%. Medically approved noncommercial versions also are available. Prices start at $70 each in OEM quantities.
Mansfield, Mass.


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