AC-DC converter IC set to do away with energy-wasting linear transformer adapters
23 October 2002
Power Electronics / Power Management
What is said to be a revolutionary switching power supply IC, that cost-effectively replaces inefficient linear transformer designs in adapters and battery chargers rated at 3 W and below, has been announced by Power Integrations.
The 'LinkSwitch' (derived from phrase 'Linear Killer Switch'), is a highly integrated high-voltage power conversion IC designed specifically to displace low power linear transformers by delivering switcher benefits. This means smaller size, lighter weight, superior performance and energy efficiency - at equal or lower system cost, according to the company.
With as few as 14 components, the LNK501 can enable a fault protected, universal input (85 to 265 V a.c.), constant voltage, constant current (CV/CC) output switching power supply that meets worldwide energy efficiency standards.
The LinkSwitch family is based on the same technology as the company's widely used TOPSwitch product lines. It combines a 700 V power MOSFET, PWM controller, high voltage start-up, current limit, and thermal shutdown circuitry onto a single CMOS chip.
LinkSwitch introduces a revolutionary topology for low power switching supplies that rivals the simplicity and low cost of linear supplies. The part uses a novel primary-based CV/CC solution that combines the primary clamp, feedback, IC supply and loop compensation functions. This eliminates up to twenty external components typically found in alternative switcher designs. This CC power supply output characteristic is ideal for many low cost battery chargers, providing overload protection under output short circuit conditions.
Requiring only three terminals, LinkSwitch includes a number of built-in features including thermal and current limit protection, auto-restart for short circuit and open loop fault protection, and the company's EcoSmart technology which reduces the energy consumption of the power supply during standby and no-load conditions. This enables engineers to design converters that easily meet government energy guidelines such as energy star, blue angel, the EC code of conduct, and others.
Further reading:
The importance of power integrity
Spectrum Concepts
Power Electronics / Power Management
[Sponsored] Behind every high-speed system lies the need for power integrity. Without it, even the cleanest signal paths become compromised.
Read more...
Precise multi-vital sign monitoring
Future Electronics
Power Electronics / Power Management
The AS7058 by ams OSRAM is an integrated multi-vital sign monitoring device, which provides a complete photoplethysmogram, electrocardiogram, body impedance sensor, and electrodermal activity sensor.
Read more...
Automotive battery diagnostics tester
Comtest
Power Electronics / Power Management
Midtronics’ MVT handheld battery tester is a revolutionary tool, powered by MDX-AI, which is set to redefine the standards of battery diagnostics and testing in the automotive industry.
Read more...
Advanced 3-phase controllers
Future Electronics
Power Electronics / Power Management
The STSPIN32G0 by STMicroelectronics is a family of highly integrated system-in-package providing solution suitable for driving three-phase brushless motors.
Read more...
Converting high voltages without a transformer
Altron Arrow
Editor's Choice Power Electronics / Power Management
With appropriate power converter ICs, such as the LTC7897 from Analog Devices, many applications can be suitably powered without having to use complex and cost-intensive transformers.
Read more...
Reliable power for demanding applications
Conical Technologies
Power Electronics / Power Management
The Mibbo Power MTR480 three-phase DIN-rail power supply is engineered to meet stringent industrial automation requirements, offering dependable performance in environments where downtime is not an option.
Read more...
Powering performance and precision
Future Electronics
Power Electronics / Power Management
onsemi’s innovative T10 series MOSFETs, available in 40 V and 80 V versions, are designed for high-efficiency, fast-switching, and power-dense applications.
Read more...
Programmable flyback switcher ICs
Future Electronics
Power Electronics / Power Management
Power Integrations has announced the release of the InnoSwitch5-Pro family of programmable flyback switcher ICs, which offer more than 95% efficiency in streamlined AC-DC converter designs.
Read more...
Multilayer chip beads with 8 A rating
RS South Africa
Power Electronics / Power Management
TDK Corporation has expanded its MPZ1608-PH series of large-current multilayer chip beads for automotive and commercial power supply lines.
Read more...
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...
printer friendly version