Semtech has expanded its line of high efficiency buck controllers with the addition of the SC418 and SC419 platform products.
The SC419 is intended for operation in systems that have dual supplies, while the SC418 integrates a low dropout (LDO) regulator to enable operation from a single supply up to 28 V. Both devices feature strong gate drives (2 A high side, 4 A low side), and are optimised for low EMI and high efficiency over an extended load range. Efficiency enhancing features include Semtech’s patent-pending ultrasonic power save with programmable floor frequency. Semtech’s SmartDrive reduces EMI and eliminates the need for snubbers or gate drive resistors by adjusting the drive characteristics to the needs of specific MOSFETs.
The programmable LDO embedded in the SC418 can be used to provide the 5 V necessary for the gate drive bias, allowing true single input rail operation. Internal crossover circuitry optimises efficiency by bypassing the LDO after startup if the LDO and buck outputs are the same. Semtech’s Smart Power Save technique enables the SC418 to re-enter continuous conduction mode when active loads attempt to pull the output high while in power save mode, pulling the output back down and avoiding over-voltage latch-off.
Pseudo fixed frequency adaptive on-time control gives the parts good transient response while reducing the output filter capacitance required and simplifying the design process by removing external compensation components. The controller can be readily set up to allow output voltages up to 12 V, will support full ceramic output capacitor solutions, and will start up into a pre-biased output. The strong gate drives provide enough current to power a single phase solution up to 30 A.
The SC418 and SC419 have built-in soft-start, cycle-by-cycle current limiting, over-temperature, over-voltage and under-voltage protection features. They also include a ‘power good’ output for the switching regulator, which may be used for diagnostics and sequencing.
MOSFET half-bridge power stage 30 June 2020, Altron Arrow
, Power Electronics / Power Management
Vishay Intertechnology introduced a new 30 V n-channel MOSFET half-bridge power stage that combines a high-side TrenchFET MOSFET and low-side SkyFET MOSFET with integrated Schottky diode in one compact ...
Read more...Programmable electronic DC loads with energy recovery 30 June 2020, Vepac Electronics
, Power Electronics / Power Management
Elektro-Automatik’s new series of electronic DC loads with energy recovery to mains, called EA-ELR 9000 HP, is an advancement of the series EA-ELR 9000. It offers a wider AC input range for operation ...
Read more...18 V synchronous buck converters 30 June 2020, Altron Arrow
, Power Electronics / Power Management
Suitable for consumer and industrial applications, Diodes Incorporated announced the AP62xxx family of high-efficiency synchronous step-down DC-DC converters including the AP62250 (2,5 A), AP62300 (3 A), ...
Read more...MOSFET half-bridge power stage 30 June 2020, Altron Arrow
, Power Electronics / Power Management
Vishay Intertechnology introduced a new 30 V n-channel MOSFET half-bridge power stage that combines a high-side TrenchFET MOSFET and low-side SkyFET MOSFET with integrated Schottky diode in one compact ...
Read more...Laser diode driver power supplies 30 June 2020, Vepac Electronics
, Power Electronics / Power Management
DEI offers a variety of laser diode driver instruments designed with the laser researcher, system designer and scientist in mind. In both bench-top and rack-mount configurations, as well as a variety ...
Read more...USB Type-C power delivery controller 30 June 2020, CST Electronics
, Power Electronics / Power Management
The MAX77958 from Maxim Integrated is a robust solution for USB Type-C CC detection and power delivery (PD) protocol implementation. It detects connected accessories or devices by using Type-C CC detection ...
Read more...What’s in your healthcare monitor? 29 July 2020, Altron Arrow
, Power Electronics / Power Management
System designers of portable and wireless medical monitoring devices used for in-home patient health monitoring purposes face daunting design challenges such as thermally- and space-constrained enclosures, as well as being able to transmit data without interference or interruption.
Read more...Laser diode driver power supplies 29 July 2020, Vepac Electronics
, Power Electronics / Power Management
DEI offers a variety of laser diode driver instruments designed with the laser researcher, system designer and scientist in mind.
In both bench-top and rack-mount configurations, as well as a variety ...
Read more...Low-voltage automotive buck converter 29 July 2020, Altron Arrow
, Power Electronics / Power Management
Diodes Incorporated announced the AP61100Q, a 5,5 V, 1 A continuous output current, automotive-compliant, synchronous buck converter for point of load (POL) applications.
With a fully integrated 110 mΩ ...
Read more...LDO for noise-sensitive applications 29 July 2020
, Power Electronics / Power Management
Diodes Incorporated announced the AP7353 low dropout (LDO) regulator, which offers a high power supply rejection ratio (PSRR) in a small package, meeting the need for voltage regulation in noise-sensitive, ...
printer friendly version