Статьи - Питание

Frederik Dostal

Even switch-mode power supplies with a fixed switching frequency do not always show a continuing pattern of pulses. In some conditions, pulses are omitted for various reasons. This is important to consider for output ripple voltage and EMI effects. ...

Christopher Paul

Several Design Ideas (DIs) have employed the subject ICs to implement programmable current sources in an innovative manner ( References 1-3 ). Figure 1 shows the idea. Figure 1. Two independent current sources, one for loads referenced to the more ...

Frederik Dostal

Abstract There is a new product type in the industry, the digital low dropout (LDO) linear regulator. It offers telemetry and adjustability of a linear power supply in a very small footprint. Such solutions are used in ultralow noise applications ...

Frederik Dostal

This article will illustrate how special converters equipped with PassThru mode can be useful when the circuit’s input voltage is too high or too low to power a load. It will give examples of how PassThru mode is used with buck-boost ...

T.K. Hareendran

Most mission-critical systems need to be designed for near-zero downtime throughout their useful life. So, if a component of such a system fails or needs updating, it must be replaced without interrupting the rest of the system. Here, the board or ...

William Klein

Voltage to current conversion circuits can take on several forms depending on the nature of the load connections. In those cases where the load is single ended, that is one end must be connected to ground, and where bipolar current flow is ...

Christopher Paul

The ever innovative and prolific Mr. Woodward has offered “PWM-programmed LM317 constant current source” [ 1 ], an intriguing programmable constant current source which elicited a lively conversation in its comments section. A Zen ...

Frederik Dostal

Many different switching regulator topologies exist. Some, such as the classic stepdown converter, also known as a buck converter, are very widespread. However, there are also a few lesser known switch-mode dc-to-dc converters, including the zeta ...

John Dunn

Imagine that you have a voltage source in series with some source resistance feeding power to a variable load. The relationship between load voltage, load current, and cell current can be drawn as follows in Figure 1. Figure 1. The load voltage ...

Frederik Dostal

A new control loop architecture is designed to generate very low noise voltages. This can be utilized by both linear and switching regulators. In addition to the low noise achieved, the level of noise becomes independent of the set output voltage. ...