Technical Features

July 2012
Protect Small Sensors from the Harsh Industrial Environment

Click image to enlarge

Figure 1. Welding in Automotive Assembly Line

Sensors are ubiquitous in the electrically harsh industrial environment (Figure 1). As they increase in sophistication and shrink in size, they become more complex, requiring on-board switching regulators to deliver power more efficiently for minimal heat generation. How do you safely deliver low-voltage power
. . . Read More
Date:
03/30/2019
Safety and reliability in home alternative-energy systems

Click image to enlarge

Figure 1: A typical AES design includes power sources sharing a common high-voltage DC Link, an inverter for generating AC, and a system controller ensuring coordinated operation.

Solar- and wind-power-based home AESs (alternative energy systems) are becoming more popular among consumers. To achieve the product lifetime that consumers demand and ensure user safety,
. . . Read More
Date:
07/25/2012
Consumer-Friendly Power Design

Click image to enlarge

Figure 1: Step-down converter efficiency used to power the main processor in a set top box

The intricacies of power design are not conversation pieces for electronic-product consumers. Nor should they be. Consumers care about visible signs of power design in the product, including the
. . . Read More
Date:
07/24/2012
Improving battery-fuel-gauge accuracy

Click image to enlarge

Figure 1: The principle of fuel gauging based on coulomb counting: The stored energy represents state of charge. A circuit measures the in- and out-flowing current.

For simplicity, you can imagine the battery as an energy storage device analogous to a fuel tank. However, measuring stored energy from an electrochemical device is far more complex than that comparison
. . . Read More
Date:
07/20/2012

Input-line-current synthesis in PFC control

Click image to enlarge

Figure 1: Converter input power vs. line current with a symmetric conduction angle, constant current peak and resistive load.

Traditionally, PFC (power-factor-correction) controls present a purely resistive behavior with respect to the power line. By means of multiplier or equivalent blocks, front-end converters draw
. . . Read More
Date:
07/13/2012
Smart Activation circuit protection in li-ion battery applications

Click image to enlarge

Figure 1: The activation steps of the MHP device

Li-ion technology with smaller, lighter-weight, and higher-power batteries is now replacing nickel-cadmium or lead-acid batteries in high-discharge-rate battery applications. Meanwhile,
. . . Read More
Date:
07/09/2012
Reduce stand-by power loss in AC—DC supplies
Over the past decade, controller-IC manufacturers have worked to reduce so-called vampire or stand-by power consumption. Organizations such as Energy Star in the US, Blue Angel in Germany, and CNIS
. . . Read More
Date:
07/01/2012