Product Details Supplier Info More products
4282

Linear Technology has introduced the LTC4282, an energy monitoring Hot Swap controller with dual MOSFET drive to enable 100A and higher current board designs. The LTC4282 ensures safe board insertion and removal from live 2.9V to 33V backplanes by controlling external N-channel MOSFETs to gently power up capacitors, avoiding sparks, connector damage and system glitches. High current hot-pluggable boards utilise parallel MOSFETs to reduce voltage drop, but all of these MOSFETs require large safe operating area (SOA) to ride through overcurrent faults.

By controlling two matching current limited paths, the LTC4282 halves each path’s SOA requirements, reducing MOSFET costs in high current applications (>50A). Further cost savings are afforded with a staged start configuration employing a low SOA MOSFET in one path and low RDS(ON) MOSFETs in the other path. The LTC4282 provides a rugged, compact solution for hot plugging and monitoring, especially in high power circuit boards in servers, network routers and switches, and enterprise data storage systems.

Sitting at the gateway to board power, the LTC4282’s ±0.7 per cent accurate ADC (analogue-to-digital converter) reports board voltage, current, power and energy consumption through an I2C/SMBus digital interface. During overcurrent conditions, the LTC4282 folds back its 2 per cent accurate current limit to maintain constant MOSFET power dissipation for an adjustable timeout period. Digitally configurable current limit enables dynamic adjustment with load changes and eases selection of low value sense resistors. Minimum and maximum values of the monitored electrical parameters are recorded, with alerts raised when they exceed 8-bit thresholds. Internal EEPROM provides nonvolatile storage for register configuration and fault log data. To prevent catastrophic damage to the board, the MOSFETs are continuously monitored for abnormal conditions such as low gate voltage and drain-to-source short-circuit or large voltage drop.

Specified over the 0oC to 70oC commercial and −40oC to 85oC industrial temperature ranges, the LTC4282 is offered in a 32-pin 5mm x 5mm QFN package. 1,000-piece pricing starts at $5.95 each.

Linear Technology

Linear Technology Corporation, a member of the S&P 500, designs, manufactures and markets a broad line of high-performance analogue-integrated circuits for major communications, computer and industrial companies worldwide.

Linear Technology Corporation, a member of the S&P 500, designs, manufactures and markets a broad line of high-performance analogue-integrated circuits for major communications, computer and industrial companies worldwide.

Linear (or analogue) circuits provide an essential bridge between our analog world and the digital microelectronics used in consumer products, wireless communications, networking products, computers, medical electronics, factory automation and automotive electronics.

Linear Technology provides customers with high performance amplifiers, comparators, voltage references, monolithic filters, linear regulators, DC/DC converters, battery chargers, data converters, communications interface circuits, RF signal conditioning circuits and many other analogue functions.

The company markets over 7,500 products to more than 15,000 original equipment manufacturers. These products compete in the marketplace based on their performance, functional value, quality and reliability. Linear Technology products are produced using state-of-the-art silicon gate CMOS, BiCMOS, complementary bipolar, high-voltage and RF wafer-fabrication process technologies.

Linear Technology, headquartered in Milpitas, California, employs 4,100 people worldwide and has technical sales and support locations throughout North America, Europe and Asia. In addition to manufacturing, assembly and test facilities in California, Washington, Singapore and Malaysia, the company has 12 design centers in Arizona, California (3), Colorado, Vermont, Massachusetts, New Hampshire, North Carolina, Texas, Singapore, and Munich, Germany.

View full profile