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

ADP8860 backlight LED driver

Analog Devices introduces ADP8860 new backlight LED driver with automatic phototransistor control .
The light intensity is fully programmable via the I2C® interface. ADP8860 offer ambient light detection levels for various user operating conditions , function which eliminates the need for a processor to monitor the phototransistor. The ADP8860 allows as many as six LEDs to be independently driven up to 30 mA (typical) and seventh LED can be driven to 60 mA (typical). All LEDs are programmable for minimum/max-imum current and fade in/out times via the I2C interface. These LEDs can also be combined into groups to reduce the processor instructions during fade in/out.
Main features of the ADP8860 backlight LED driver are : programmable modes for ambient light sensing , Outdoor / office and dark modes for maximum backlight power savings , 7 independent and programmable LED drivers , 6 drivers capable of 30 mA (typical) , 1 driver capable of 60 mA (typical) , programmable maximum current limit (128 levels) ,I2C-compatible interface for all programming , Short-circuit, overvoltage, and overtemperature protection
ADP8860 can be used in applications like : mobile display backlighting , mobile phone keypad backlighting , dual RGB backlighting , LED indication , general backlighting of small format displays
ADP8860 backlight LED driver

CAT5172 digitally programmable linear taper potentiometer

On Semiconductor introduces new 256−position digitally programmable linear taper potentiometer ideally suited for replacing mechanical potentiometers and variable resistors. Like mechanical potentiometers, the CAT5172 has a resistive element, which can span VCC to Ground or float anywhere between the power supply rails.
The CAT5172 operates from 2.7 V to 5.5 V, while consuming less than 2 uA.
Main features of the CAT5172 digitally programmable potentiometer are : 256−position , End−to−End Resistance (50 k , 100 k ) , SPI Compatible Interface , Power−on Preset to Midscale , Single Supply 2.7 V to 5.5 V , Low Temperature Coefficient 100 ppm/°C , Low Power, IDD 2 uA max , Wide Operating Temperature −40°C to +85°C .
CAT5172 digitally programmable linear taper potentiometerCAT5172 digitally programmable linear taper potentiometer

MAX17083 step-down regulator

Maxim semiconductor release MAX17083 which is a fixed-frequency, current-mode,step-down regulator optimized for low-voltage, lowpower applications.
The MAX17083 produces an adjustable 0.75V to 2.7V output voltage from the system’s 3.3V or 5V input supply. MAX17083 step-down regulator uses a peak current-mode control scheme to eliminate the additional external compensation required by voltage-mode architectures, providing an easy-to-implement architecture without sacrificing fast transient response.
Main features of the MAX17083 are : 2.4V to 5.5V Input Range , Internal 5A Step-Down Regulator , Internal BST Switch , Fault Protection ( Undervoltage, Overvoltage, Thermal, Peak Current Limit ) , Enable Input and Power-Good Output , Voltage-Controlled Soft-Start , High-Impedance Shutdown .
Max17083 is designed to be used in applications like : Low-Power Architectures , Ultra-Mobile PCs Netbook and Nettop PCs , Portable Gaming , Notebook and Subnotebook Computers , PDAs and Mobile CommunicatorsMAX17083 step-down regulator


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