29 January 2020
Power Electronics / Power Management
A common DC-DC converter problem is generating a regulated voltage when the input voltage can be above, below, or equal to the output - that is, the converter must perform both step-up and step-down functions. This scenario is typical when powering vehicle electronics from a nominal 12 V battery, which can vary from engine cold crank (down to 3 V) and load dump (up to 100 V), or a reverse battery voltage from operator error.
There are several DC-DC converter topologies that can perform both step-up and step-down operations, from SEPIC to 4-switch topologies, but none of these solutions passes the input voltage directly to the output without actively switching.
By contrast, the LT8210 from Analog Devices is a synchronous buck-boost controller that can operate in ‘Pass-Thru’ mode, which eliminates EMI and switching losses, and maximises efficiency (up to 99,9%). Pass-Thru operation passes the input directly to the output when the input voltage is within a user programmable window.
The LT8210 operates over an input voltage range of 2,8 V to 100 V, allowing it to regulate from the minimum input voltage during cold crank to the peak amplitude of an unsuppressed load dump. The LT8210 can operate as a conventional buck-boost controller with pin-selectable continuous conduction mode (CCM), pulse skipping, or ‘Burst Mode’ operation, or in the new Pass-Thru mode in which the output voltage is regulated to a programmed window. When the input voltage resides in this window it is passed directly to the output without actively switching the FETs, resulting in ultralow IQ operation and the elimination of switching noise.
12 kW hybrid inverter
Power Electronics / Power Management
Sungrow recently unveiled its next-generation residential energy storage solution, expanding its power range from 5 kW to 12 kW with the introduction of the new MG12RL hybrid inverter.
Read more...40 W and 75 W railway DC/DC converter Brabek
Power Electronics / Power Management
RECOM has announced two new cost-efficient DC/DC converters for the rail market with an ultra-wide 11:1 input range to cover all nominal input voltages from 24 to 110 V DC.
Read more...Power modules for solid-state transformers RS South Africa
Power Electronics / Power Management
Microchip’s new 3,3 kV silicon carbide modules deliver the required thermal performance and efficiency for SSTs to increase power available for token generation.
Read more...Solving South African power problems with locally built intelligence
Editor's Choice Power Electronics / Power Management
Smart metering infrastructure in South Africa remains patchy. The rollout has been slow, coverage is inconsistent, and for the most part, granular per-unit measurement simply does not exist.
Read more...Wide range power module
Power Electronics / Power Management
The latest DC-DC modules from Würth Elektronik are characterised by high resilience to voltage transients on the 24 V bus and an extremely wide input-voltage range from 3,5 V to 38 V.
Read more...Generating negative voltages from a positive supply Altron Arrow
Editor's Choice Passive Components
It is common for IoT devices, industrial sensors, meters, and medical equipment to require both a positive and negative voltage, and this article explains the options available to produce a negative rail from a positive rail supply.
Read more...Addressing latency and signal integrity challenges Altron Arrow
DSP, Micros & Memory
Strengthening Microchip Technology’s data centre solutions portfolio, its XpressConnect retimers support high-bandwidth architectures, while helping reduce integration complexity.
Read more...Precision timing in compact package Altron Arrow
Telecoms, Datacoms, Wireless, IoT
Designed for use in harsh environments, the EX-423 incorporates a four-point mounted quartz crystal structure that improves shock resistance and reduces g-sensitivity.
Read more...Selecting primary batteries for maximum service life Uniross Batteries
Power Electronics / Power Management
Primary batteries play an important role in IoT applications. Designed for longevity, they have a high-energy capacity and are often used in standalone applications where charging is impractical or impossible.
Read more...EMC limits and levels Altron Arrow
Editor's Choice Circuit & System Protection
As soon as electronics and electrical systems started interfering with each other, the world had to come to some consensus. Considering physics is universal and does not care about what country electrical/electronic products are used in, it should be the same everywhere, right? It is nearly there, but not quite.
While every effort has been made to ensure the accuracy of the information contained herein, the publisher and its agents cannot be held responsible for any errors contained, or any loss incurred as a result. Articles published do not necessarily reflect the views of the publishers. The editor reserves the right to alter or cut copy. Articles submitted are deemed to have been cleared for publication. Advertisements and company contact details are published as provided by the advertiser. Technews Publishing (Pty) Ltd cannot be held responsible for the accuracy or veracity of supplied material.
printer friendly version