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Circuits

OVP Controllers Drive an External pFET and Draw Only 13µA

The MAX4923-MAX4926 are overvoltage-protection (OVP) controllers that drive an external pFET. These devices save power by drawing a low 13-µA (typ) supply current. They achieve a low supply current by using an external pFET, thus eliminating the need for an integrated charge pump, which is the main source of excessive current drain. The MAX4923-MAX4926 family of controllers is ideal for cell...

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DC/DC Converter ICs feature 1.2 MHz oscillation frequency.

Series S-8550/8551 is CMOS synchronous rectification, step-down switching regulator that includes reference voltage circuit, oscillator, error amplifier, phase compensation circuit, PWM controller, under voltage lockout circuit (UVLO), current limit circuit, and power MOSFET. Offered in different pin configurations, dexice is suited for mobile phones, Bluetooth devices, wireless devices, audio...

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Fujitsu to Highlight Latest WiMAX Fixed and Mobile Device Technologies at Annual WiMAX World in Chicago, September 25-27

Fujitsu General Manager Awaga Featured at Mobile Broadband Session, Tuesday, September 25 CHICAGO and SUNNYVALE, Calif., Sept. 24 / / -- WiMAX World -- Fujitsu Microelectronics America, Inc. (FMA) will feature its newest mobile and fixed WiMAX device technologies at the annual WiMAX World Conference September 25-27 at McCormick Place in Chicago. In booth 305, Fujitsu will highlight its MB87K21...

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IGBT Modules have 100-240 Vac input voltage.

Providing power module for controlling 3-phase inverters used to drive motors of residential and commercial appliances, Series SCM1100M can withstand voltages up to 600 V and feature 5-15 A output current. IC consists of 6 IGBTs, 3 pre-drive ICs, and 6 flyback diodes needed to configure main circuit of inverter, as well as bootstrap circuit (3 bootstrap diodes and 3 boot resistors) as highside...

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Brushless DC Motor Pre-Driver suits low current applications.

Model A4931 is designed with outputs for direct high current gate drive of N-channel power MOSFET 3-phase bridge with maximum supply voltage of 38 V. It also includes sequencer for commutation control, fixed off time pulse width modulation (PWM) current control, and locked rotor protection. Available in 5 x 5 mm, 28-lead, and Pb-free QFN package, unit operates over -20 to 105-

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VoIP System-on-Chip delivers 72 channels of voice.

Suited for deployment in Multi-Service Access Network and Digital Loop Carrier environments, Entropia(TM) III-C features internal host processor, internal security engine, reference POTS drivers, and on-chip call-processing software. System supports all wireline and wireless codecs while assuring carriers of 72 LBR-channel capacity, regardless of mix of codecs in routing.

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TrendChip and Ralink Jointly Launch 802.11n Wi-Fi ADSL2+ Gateway Reference Platform

HSINCHU, Taiwan, Sept. 27 -- TrendChip Technologies Corporation, a leading xDSL IC developer and provider, and Ralink Technology Corporation, a leading wireless LAN chipset solutions, have jointly announced the launch of an industry leading 802.11n WiFi ADSL2+ gateway reference platform that integrates a full spectrum of ADSL2+ technologies developed by TrendChip with the advanced 802.11n draft...

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NEC Electronics' Certified Wireless USB Device Wire Adapter Chip Integrated into IOGEAR's Wireless USB Hub and Adapter Kit

Agreement Helps Drive Industry Adoption of Certified Wireless USB Standards SANTA CLARA, Calif., Sept. 18 / -- NEC Electronics America, Inc., today announced that its Certified Wireless USB device wire adapter (DWA) chip, the uPD720180, has been integrated into a Wireless USB Hub and Adapter Kit (GUWH104KIT) from IOGEAR, Inc., a leading connectivity manufacturer. One of the first products to...

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PoE Interface Controllers eliminate external power supplies.

PoE Powered Device Interface Controllers feature IEEE802.3af-compliant interface to PoE-powered RJ-45 wall socket and Hot Swap Controller which protects PD during insertion, operation, and power withdrawal. Powered by CAT5 Ethernet cabling, they integrate high-voltage power MOSFET with low RDS ON that can accept transients as high as 100 V. Model STHS4257 integrates 25 kW Signature Resistor with...

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Synchronous Buck Regulators suit 3 and 5 V supply rails.

Operating at 1 MHz and 4 MHz, respectively, Models MIC22600 and MIC22601 feature built-in sequencing, tracking, and ramp controls. Integrated 30 mW P-FET and 25 mW N-FET switches deliver 6 A output current with input voltage range of 2.6-5.5 V. Available in 4 x 4 mm MLF-® package, ICs have adjustable output voltage option down to 0.7 V and provide efficiencies of up to 93%. Junction operating...

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