DC/DC controller operates from 1,8 to 20 V
25 October 2000
Power Electronics / Power Management
Linear Technology's LT1619; a current-mode step-up DC/DC controller designed for a wide range of SEPIC, flyback and isolated power supplies, uses a lower value of sense resistor compared to other solutions, which improves efficiency up to 5%, says the company. The device's constant 300 kHz operating frequency reduces the value and size of the inductor and capacitors, which also simplifies filtering. Its clock frequency is synchronisable to 500 kHz. The wide input voltage range of 1,8 to 20 V makes it ideal for applications such as flyback, 3X V conversion to 5, 12 or 15 V output in distributed power and 5 to -48 V telecom applications, as well as automotive power supplies.
The LT1619's low 53 mV full-scale sense voltage permits use of the lowest value sense resistor for a given output current minimising I2R losses. To further improve efficiency, the IC's burst mode operation maximises efficiency at light load currents. Its powerful 1,5 A MOSFET driver is designed to drive a low side power transistor simplifying the design of boost, SEPIC, flyback and other topologies. Low 140 µA supply current and 15 µA shutdown conserve battery energy especially important in systems that have a high sleep-to-run time ratio.
The LT1619 is offered in 8-lead MSOP and SOIC packages.
Further reading:
The role of bidirectional charging in the evolving energy landscape
Avnet Silica
Power Electronics / Power Management
As reliance on renewable sources like wind and solar continues to grow, the need for efficient energy flow and storage solutions has become more critical than ever.
Read more...
How to calculate a buck converter’s inductance
Power Electronics / Power Management
In the buck circuit, the inductor design is a key element that is closely related to system efficiency, the output voltage ripple, and loop stability.
Read more...
High-current EMI filters
Accutronics
Power Electronics / Power Management
TDK has introduced 20 and 40 A, 80 V DC board-mount EMI filters, reducing differential mode conducted emissions for switching power supplies with high input current requirements.
Read more...
Isolated SMD DC-DC converters
iCorp Technologies
Power Electronics / Power Management
MinMax has launched a series of isolated SMD DC-DC converters, the MSU01 series delivering 1 W, while the MSU02 series offers 2 W output.
Read more...
Next-gen power meter
Electrocomp Express
Power Electronics / Power Management
The VT-PWR-LV is a next-gen Vista Touch power meter from Trumeter for single, split, and three-phase systems.
Read more...
Advanced PMIC for high-performance AI applications
ASIC Design Services
Power Electronics / Power Management
Microchip Technology has announced the MCP16701, a Power Management Integrated Circuit (PMIC) designed to meet the needs of high-performance MPU and FPGA designers.
Read more...
New SiC power MOSFET
Future Electronics
Power Electronics / Power Management
STMicroelectronics’ SCT012H90G3AG is a robust, automotive-grade SiC MOSFET, engineered for demanding power electronics, featuring a 900?V drain-source voltage and exceptionally low on-resistance of 12?mO at 60?A.
Read more...
Fundamental motor control design challenges and solutions
Power Electronics / Power Management
Mouser Electronics has announced a new eBook in collaboration with Qorvo, featuring industry experts providing key insights into methods, power efficiency and integration solutions available for motor control applications.
Read more...
Power management IC for battery products
Power Electronics / Power Management
The nPM1304 PMIC complements Nordic’s nPM1300 PMIC with a highly integrated, ultra-low power solution and precision fuel gauging for small size battery applications.
Read more...
Powering Innovation eBook: Changing what’s possible
Power Electronics / Power Management
This exclusive read, entitled ‘Changing what’s Possible,’ delves into how power dense Vicor modules enable many world-changing innovations across various sectors.
Read more...
printer friendly version