Microchip’s Li-ion battery charger MCP73831 IC

КУПИТЬ СО СКИДКОЙ

Microchip announced the expansion of its analog power-management family with the MCP73831 battery charger, a fully-integrated, single-cell, Li-ion/Li-Polymer charge-management controller. Tiny 500mA linear charge management controller can be powered directly from the USB port. Includes integrated pass transistor, current sense and reverse-discharge protection, the MCP73831 charger reduces the number of components needed for battery-charger designs. Its highly accurate, pre-set voltage regulation (maximum accuracy 0.5 per cent to 0.75 per cent) results in more fully charged batteries and extended battery life. Since the MCP73831 charge-management controller includes a pass transistor, current sense and reverse-discharge protection on a single chip, it reduces the number of system components needed for battery-charger designs, which, added Microchip, lowers overall system costs.

Features
High accuracy preset output voltage regulation (+/-0.75%)
Output voltage options include 4.2V, 4.35V, 4.4V and 4.5V
User-programmable charge current
Charge status output can directly drive LEDs
On-chip thermal regulation
Preconditioning and end-of-charge ratio options
Under-voltage lockout

The integrated charger provides highly accurate output-voltage regulation, with a maximum accuracy of 0.5 per cent to 0.75 per cent, resulting in more effectively charged batteries with longer life. Its thermally efficient DFN package option allows high charging currents of up to 500mA for faster charging. The controller also features on-chip thermal regulation that decreases charge current when temperatures become too hot, preventing damage to the chip. Furthermore, the MCP73831’s charge current is user-programmable, enabling designers to customize charging currents for specific applications.

«The MCP73831 charge management controller offers the best combination of features, output-voltage regulation, and thermally-efficient packaging on the market for small, Li-ion and Li-Polymer-powered applications,» said Keith Pazul, marketing manager with Microchip’s analog and interface products division. «This new charger supports market trends toward consumer devices that deliver higher performance and longer battery life in miniature packages.»

Another key feature of the MCP73831 charger is its simple status output pin that directly drives single or multi-colour LEDs. The charger also supports multiple regulation voltage outputs, making it an effective charging solution for many types of Li-ion battery technologies. The MCP73831 is designed for battery-powered consumer applications requiring small size and thermal regulation, such as wireless headsets, MP3 players and digital cameras.

The MCP73831 is offered in 5-pin SOT-23 package and in the thermally enhanced, 2-by-3mm, 8-pin DFN package. This device is already available for sampling and volume production.

Build your own Accurate LC Meter (Capacitance Inductance Meter) and start making your own coils and inductors. This LC Meter allows to measure incredibly small inductances making it perfect tool for making all types of RF coils and inductors. LC Meter can measure inductances starting from 10nH — 1000nH, 1uH — 1000uH, 1mH — 100mH and capacitances from 0.1pF up to 900nF. The circuit includes an auto ranging as well as reset switch and produces very accurate and stable readings.

Volt Ampere Meter measures voltage of 0-70V or 0-500V with 100mV resolution and current consumption 0-10A or more with 10mA resolution. The meter is a perfect addition to any power supply, battery chargers and other electronic projects where voltage and current must be monitored. The meter uses PIC16F876A microcontroller with 16×2 backlighted LCD.

Frequency Meter / Counter measures frequency from 10Hz to 60MHz with 10Hz resolution. It is a very useful bench test equipment for testing and finding out the frequency of various devices with unknown frequency such as oscillators, radio receivers, transmitters, function generators, crystals, etc.

1Hz — 2MHz XR2206 Function Generator produces high quality sine, square and triangle waveforms of high-stability and accuracy. The output waveforms can be both amplitude and frequency modulated. Output of 1Hz — 2MHz XR2206 Function Generator can be connected directly to 60MHz Counter for setting precise frequency output.

Be «On Air» with your own radio station! BA1404 HI-FI Stereo FM Transmitter broadcasts high quality stereo signal in 88MHz — 108MHz FM band. It can be connected to any type of stereo audio source such as iPod, Computer, Laptop, CD Player, Walkman, Television, Satellite Receiver, Tape Deck or other stereo system to transmit stereo sound with excellent clarity throughout your home, office, yard or camp ground. USB IO Board

USB IO Board is a tiny spectacular little development board / parallel port replacement featuring PIC18F2455/PIC18F2550 microcontroller. USB IO Board is compatible with Windows / Mac OSX / Linux computers. When attached to Windows IO board will show up as RS232 COM port. You can control 16 individual microcontroller I/O pins by sending simple serial commands. USB IO Board is self-powered by USB port and can provide up to 500mA for electronic projects. USB IO Board is breadboard compatible.

ESR Meter kit is an amazing multimeter that measures ESR values, capacitance (100pF — 20,000uF), inductance, resistance (0.1 Ohm — 20 MOhm), tests many different types of transistors such as NPN, PNP, FETs, MOSFETs, Thyristors, SCRs, Triacs and many types of diodes. It also analyzes transistor’s characteristics such as voltage and gain. It is an irreplaceable tool for troubleshooting and repairing electronic equipment by determining performance and health of electrolytic capacitors. Unlike other ESR Meters that only measure ESR value this one measures capacitor’s ESR value as well as its capacitance all at the same time. Audiophile Headphone Amplifier Kit

Audiophile headphone amplifier kit includes high quality audio grade components such as Burr Brown OPA2134 opamp, ALPS volume control potentiometer, Ti TLE2426 rail splitter, Ultra-Low ESR 220uF/25V Panasonic FM filtering capacitors, High quality WIMA input and decoupling capacitors and Vishay Dale resistors. 8-DIP machined IC socket allows to swap OPA2134 with many other dual opamp chips such as OPA2132, OPA2227, OPA2228, dual OPA132, OPA627, etc. Headphone amplifier is small enough to fit in Altoids tin box, and thanks to low power consumption may be supplied from a single 9V battery.

Arduino Prototype is a spectacular development board fully compatible with Arduino Pro. It’s breadboard compatible so it can be plugged into a breadboard for quick prototyping, and it has VCC & GND power pins available on both sides of PCB. It’s small, power efficient, yet customizable through onboard 2 x 7 perfboard that can be used for connecting various sensors and connectors. Arduino Prototype uses all standard through-hole components for easy construction, two of which are hidden underneath IC socket. Board features 28-PIN DIP IC socket, user replaceable ATmega328 microcontroller flashed with Arduino bootloader, 16MHz crystal resonator and a reset switch. It has 14 digital input/output pins (0-13) of which 6 can be used as PWM outputs and 6 analog inputs (A0-A5). Arduino sketches are uploaded through any USB-Serial adapter connected to 6-PIN ICSP female header. Board is supplied by 2-5V voltage and may be powered by a battery such as Lithium Ion cell, two AA cells, external power supply or USB power adapter. 200m 4-Channel 433MHz Wireless RF Remote Control

Having the ability to control various appliances inside or outside of your house wirelessly is a huge convenience, and can make your life much easier and fun. RF remote control provides long range of up to 200m / 650ft and can find many uses for controlling different devices, and it works even through the walls. You can control lights, fans, AC system, computer, printer, amplifier, robots, garage door, security systems, motor-driven curtains, motorized window blinds, door locks, sprinklers, motorized projection screens and anything else you can think of.