Integrated Circuits

IC chips and Discrete Devices. Silicon, Germanium and Gallium Arsenide products. Diodes, Transistors and Zeners. Part of delabs Technologies

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Friday, September 18, 2020

MAX8881 and DS2490 Characterization for Cells

Rechargeable AA cells are very popular for a large variety of portable applications. The number of brands is also high, and the cell quality can differ considerably. Cell capacity is sometimes different from that specified, and the capacity often deteriorates dramatically after a limited number of discharge cycles. ....

See Maxim Application Note - Simple Characterization Circuit for Rechargeable AA Cells

https://www.maximintegrated.com/en/design/technical-documents/app-notes/3/3874.html

This characterization circuit, plus a PC and some software, accurately measures the full discharge cycle for a rechargeable AA cell. Cell capacity and output resistance can easily be determined from the curve resulting from these measurements.

MAX8881 and DS2490 Characterization for Cells

In Figure 1, the simple circuit is connected to the USB port of a PC. No external power source is required because power is extracted from the USB bus voltage. U1 (DS9490R) is a USB dongle that converts the USB protocol to the 1-Wire® protocol, thereby allowing the PC to communicate with the key circuit component (U2).

LED Chips and RF Semiconductors - Cree

 "Cree LEDs combine highly efficient InGaN materials with proprietary substrates to deliver superior price/performance for high-intensity LEDs...."

LED Chips and Lighting from Cree - https://www.cree.com/

Product line include lighting-class LEDs, LED lighting Solutions. They also have semiconductors for wireless and power applications.

LED Chips and RF Semiconductors - Cree

Wolfspeed, A Cree Company, stands alone as the premier provider of the most field-tested SiC and GaN Power and RF solutions in the world. As the leader in wide bandgap semiconductor technology.

Cree Lighting Solutions

"The lighting elements of LEDs are modulated by diffusers, so you won't be distracted by hotspots or glare. The only thing you'll experience is life under beautiful, radiant light."

Powerex - Power Devices Manufacturer

A leading supplier of discrete devices, modules and integrated high power semiconductor solutions. They are also a sales partner to Mitsubishi Electric and other power electronic firms.

Powerex - Power Devices Manufacturer - https://www.pwrx.com/

They manufactures a wide range of rectifier and thyristor products at its Youngwood, PA factory. The product line includes IGBTs (Insulated Gate Bipolar Transistors), HVIGBTs, IPMs (Intelligent Power Modules), rectifiers, thyristors, custom power modules and assemblies.

Powerex - IGBT HVIGBT

IGBT / HVIGBT

The Powerex IGBT/HVIGBT line-up includes both Mitsubishi devices as well as Powerex self-manufactured devices. Mitsubishi IGBTs employ their CSTBT (Carrier Stored Trench-Gate Bipolar Transistor) technology, supporting the reduced power loss and miniaturization required for industrial applications

J1-Series Power Modules Enhance Automotive Efficiency & Reliability.Powerex HVIGBTs and HV diodes, feature highly insulating housings that offer enhanced protection by means of greater creepage and strike clearance distance for many demanding applications like medium voltage drives and auxiliary traction applications.

Powerex, Inc.
200 Hillis Street, Youngwood, Pennsylvania 15697, USA.