Saturday, November 30, 2013

IRS2980 - LED Driver Control IC - International Rectifier

A high-voltage buck regulator control IC for LED light bulb replacement, LED tube lighting and other non-isolated LED driver applications.First in a family of high-voltage LEDrivIR ICs, and utilizes hysteretic average current mode control for precise current regulation. 

IRS2980 - LED Driver Control IC - International Rectifier

IRS2980 - LED Driver Control IC - International Rectifier

Some of the Features - Dimming LED driver controller, Hysteretic Current Regulation, Closed-loop LED current dimming control, Analog/PWM Dimming Input, Internal High Voltage Regulator.

IRPLLED13 - 90-250VAC Offline LED Driver using LEDrivIR IRS2980

90-250VAC Offline LED Driver

Non-isolated constant current buck regulator,  90-250V AC input voltage, 0-50V DC output voltage, Nominal output current of 350mA.

A simple single st age power converter based around the IRS2980 LED driver IC provides a contro lled current output ov er a wide AC line or DC voltage input range.

The IRPLLED13 evaluation board is an off line non-isolated constant current Buck regulator LED driver designed to supply a nominal 350mA DC output current. The LED output voltage can be up to 90% of the input voltage, operating from an AC line input volt age between 90 and 250VAC 50/60Hz. The IRPLLED13 demo board is not de signed for use with dimmers.

Wednesday, November 27, 2013

MAX5160 Digital Potentiometers - Maxim

They are linear-taper digital potentiometers perform the same function as a mechanical potentiometer or a variable resistor.

MAX5160 Digital Potentiometers - Maxim

Three resistance values are available for each part type: 50kΩ,100kΩ, and 200kΩ. A nominal resistor temperature coefficient of 50ppm/°C end-to-end and only 5ppm/°C ratiometric.

MAX5160 Digital Potentiometers - Maxim

This has 32 Tap Positions, 400Ω Wiper Resistance, 3-Wire Serial Data Input . Power-On Reset: Wiper Goes to Midscale (position 16).

See an application circuit of this chip - A solid-state industrial potentiometer simulates an equivalent mechanical potentiometer, and fits in the same space. 

Industrial 0V to +10V Digital Potentiometer

The key to this circuit is a low-power digital potentiometer IC, 100kΩ version (U3). Configured as a voltage divider, this IC provides an output of 32 discrete voltage steps between its minimum and maximum settings (0V and 5V). A low-power linear regulator (U1) provides a +5V supply rail for U2, U3, and a resistor ladder internal to U3 (whose maximum rating is +5V).