mosfet

ON Semiconductor has introduced eight new power MOSFET devices specifically designed for medium voltage switching applications. These MOSFETs are ideal for use in DC motor drives, LED drivers, power supplies, converters, pulse width modulation (PWM) controls and bridge circuits where diode speed and commutating safe operating areas are crucial and benefit from an additional safety margin against unexpected voltage transients that these devices provide.

Link Preview

STMicroelectronics has further increased the ruggedness, switching performance and efficiency of power MOSFETs for lighting ballasts, where they are used in the PFC and Half Bridge sections, as well as in switching power supplies. The use of innovative SuperMESH3 technology with lower on-resistance guarantees that higher efficiency is obtained. Additionally, due to their superior dv/dt performance and higher breakdown-voltage margin, these new devices will provide enhanced reliability and safety.

Link Preview

Linear Technology Corporation introduces the LTC4217, a 2A integrated Hot Swap controller for protecting low power boards with load supply voltages ranging from 2.9V to 26.5V. Like other Hot Swap devices, the LTC4217 allows a board to be safely inserted and removed from a live backplane by limiting the amount of inrush current to the load supply during power up. Hot Swap controllers typically call for a number of supporting components. However, the LTC4217 integrates a power MOSFET and sense resistor in its power path to limit inrush current, thereby drastically reducing the number of external components required.

Link Preview

Fairchild Semiconductor’s technologist will discuss methods to increase energy efficiency in DC-DC designs at the Embedded Power Conference held in San Jose, California September 17-18th. Fairchild’s Mike Speed will explore technology and packaging advances in MOSFET and regulator design that significantly reduce converter losses in his presentation titled “Boosting Energy-Efficiency through Advanced Power System Design.” Fairchild’s cutting-edge technologies are instrumental in helping electronics meet energy-efficiency requirements for consumer, communications, industrial, portable, computing and automotive systems.

Link Preview

Linear Technology Corporation announces the LTC3851, a wide input range synchronous step-down switching regulator controller that drives all N-channel power MOSFET stages and has coincident or ratiometric tracking. The 4V to 38V input range encompasses a wide variety of applications, including most intermediate bus voltages and battery chemistries. The strong on-board MOSFET gate drivers allow the use of high power external MOSFETs to produce output currents up to 20A with output voltages ranging from 0.8V to 5.5V, making the LTC3851 ideal for point-of-load requirements.

Link Preview

Renesas Technology Europe announced the forthcoming availability in Europe of the RJK0383DPA, a dual-type power MOSFET for synchronous rectification DC/DC converters. The new device achieves higher power supply efficiency and can be used for memory or ASICs in products such as laptop PCs and communication devices. Sample shipments will begin in October 2008.

Link Preview

Linear Technology introduces the LTC4352, a 0V to 18V ideal diode controller that enables low loss ORing of multiple power sources with minimal disturbance to supply voltages. The LTC4352 regulates the forward voltage drop across an external N-channel MOSFET to ensure smooth current transfer between supplies in diode-OR applications. In low voltage systems a slow handoff between controllers results in a voltage droop during supply switchover. The fast 500ns turn-on time and carefully architected LTC4352 ensures smooth switchover from one path to the other without oscillation

Link Preview

Linear Technology announces the LTC4358, a single high voltage ideal diode controller utilizing an internal 5A MOSFET to provide a simple, low loss replacement to Schottky diodes in high current applications. The controller and 20m Ohm internal N-channel MOSFET perform the function of a low forward voltage diode. This provides a lower loss path compared to the Schottky diode that in high current applications provides higher efficiency and preserves precious board area by eliminating the need for heat sinking. The LTC4358 regulates the forward voltage drop across the internal MOSFET to ensure smooth switchover from one path to another without oscillation. A fast pull-down circuit minimizes reverse current transients in the event a power supply fails or is shorted

Link Preview

Maxim Integrated introduces the MAX15018/MAX15019 high-voltage, high-speed MOSFET drivers for high- and low-side n-channel MOSFETs. These devices feature a high-side (HS) pin that allows input voltages up to 125V, versus the 105V rating of competitive products. Pin compatible with the industry-standard HIP2100IB and HIP2101IB, the MAX15018/MAX15019 are the best choice for ensuring sufficient safety margin in telecom power supplies that must withstand 100V or higher transient voltages.

Link Preview

Taking aim at reduced operating costs and lowering the environmental footprint in applications such as electric vehicles, STMicroelectronics, a world leader in power applications, has introduced a 250A surface-mount power MOSFET with the lowest on-resistance in the market, to minimize energy conversion losses and enable higher performance.

Link Preview