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Blog blog, news from technology , fresh release technologies and components , interesting devices and many useful electronic circuits and schematics diagrams .

NCP349 Positive Overvoltage Protection Controller

On semiconductor release the NCP349 Positive Overvoltage Protection Controller which is able to disconnect the systems from its output pin in case wrong input operating conditions are detected. The system is positive overvoltage protected up to +28 V.
The NCP349 is able to instantaneously disconnect the output from the input, due to integrated Low RON Power NMOS , if the input voltage exceeds the overvoltage threshold (OVLO) or undervoltage threshold (UVLO).
At powerup (EN pin = low level), the Vout turns on ton time after the Vin exceeds the undervoltage threshold.
In addition, the device has ESD−protected input (15 kV Air) when bypassed with a 1.0 _F or larger capacitor.
NCP349 can be used in applications like : Cell Phones ,Camera Phones , Digital Still Cameras , Personal Digital Applications , MP3 Players
Main features of the NCP349 are : Overvoltage Protection up to 28 V , On−Chip Low RDS(on) NMOS Transistor Internal Charge Pump , Overvoltage Lockout (OVLO) , Undervoltage Lockout (UVLO) , Soft−Start , Alert FLAG Output , Shutdown EN Input , Compliance to IEC61000−4−2 (Level 4) , 8.0 kV (Contact) 15 kV (Air) , ESD Ratings: Machine Model = B , Human Body Model = 3 , DFN6 1.6x2 mm Package
NCP349 Positive Overvoltage Protection Controller

ADuM4160 first single-IC USB isolator

Analog Devices release ADuM4160 first single-IC USB isolator; device significantly reduces the cost, size, and design time to realize an isolated USB solution.ADuM4160 USB isolator offers 5 kV rms medical-grade isolation, upstream short-circuit protection, and fully isolated 1.5-Mbps and 12-Mbps data rate .
Main features of ADuM4160 USB isolator are : USB 2.0 compatible Enhanced system-level ESD , 4.0 V to 5.5V operation 7 mA maximum up-stream supply current @ 1.5 Mbps 8 mA maximum up-stream supply current @ 12 Mbps 2.5mA up-stream idle current , Bidirectional communication , Short Circuit Protection High temperature operation , Full Speed data rate: 1.5Mbps and 12 Mbps , High common-mode transient immunity: >25 kV/μs .
ADuM4160 USB isolator can be used in USB APPLICATIONS like USB peripheral isolation , Isolated USB Hub , Repeaters

MCP651/2/5 world’s first and only op amps to include mCal

Microchip Technology Inc introduced the world’s first and only op amps to include mCal, an on-chip calibration circuit that calibrates offset voltage at power-up using an internal power on-reset detector, or based upon the state of an external pin.
At power up, these op amps are self-calibrated using mCal and are optimized for high speed, low noise and distortion, single-supply operation with rail-to-rail output and an input that includes the negative rail .
Main features of MCP651/2/5 are : Gain Bandwidth Product: 50 MHz (typical) , Short Circuit Current: 100 mA , Noise: 7.5 nV/√Hz (typical, at 1 MHz) , Calibrated Input Offset: ±200 μV (maximum) , Rail-to-Rail Output , Slew Rate: 30 V/μs (typical) , Supply Current: 6.0 mA (typical) , Power Supply: 2.5V to 5.5V , Extended Temperature Range: -40°C to +125°C .
MCP651/2/5 can be used in applications like : Driving A/D Converters , Power Amplifier Control Loops , Barcode Scanners , Optical Detector Amplifier
MCP651/2/5 world’s first and only op amps to include mCal MCP65x-test-ecuatiON


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