State-of-the-art primary side switch for AC/DC converters
22 February 2006
Power Electronics / Power Management
F. Salanitri, VIPower product marketing, STMicroelectronics
The new VIPer53E from STMicroelectronics includes a PWM driver, an MDmesh MOSFET, a start-up high-voltage current source and several on-chip protection circuits.
The VIPer53E is an alternative choice to ST's VIPer53 when only the secondary regulation is required in a power supply. Like the standard VIPer53, the new version is housed in surface mounting DIP-8 and PowerSO-10 packages.
The higher VDD voltage range brings flexibility in designing the transformer. In fact in secondary regulation VIPer53E VDD voltage extends from 9 V to 18 V, while in the VIPer53 it goes from 9 V to 14,5 V and this wide voltage range can follow fast load variations. The extended VDD is implemented by eliminating an internal error amplifier.
Why use it?
Thanks to the MDmesh MOSFET with a breakdown voltage of 620 V, an RDS(on) of 1 Ω at 25°C and a typical handling output power of 40 W for a 85 to 265 V a.c. voltage mains is possible. For this level of power, the device does not require a heatsink.
The total power consumption of the converter is less than 0,5 W for the system when working in stand-by mode. This means power supply designers can easily meet the Blue Angel Eco or Energy Star Program.
Key features include: automatic burst mode for very low consumption in stand-by conditions (less than 500 mW); integrated high voltage start-up current source; overload and short-circuit control; over-voltage protection at 18 V; over-temperature shutdown; under-voltage protection; current mode control with adjustable drain current limitation; externally-set switching frequency, up to 300 kHz.
Applications
Although the main application of VIPer53E is in AC/DC converters for consumer equipment such as set-top boxes, DVDs, VCRs, it can also be used for stand-by power supplies for servers or in home appliances where a very efficient AC/DC power supply in buck topology is needed.
Further reading:
High-precision current transducer
Power Electronics / Power Management
Danisense announces its new high-precision DP12IP current transducer designed for isolated DC and AC current measurement in demanding PCB-mounted power electronics applications.
Read more...
Secure holder for protected 18650 batteries
Power Electronics / Power Management
Designed for protected 18650 batteries up to 70 mm long, the holder offers secure retention for portable, industrial, and embedded applications.
Read more...
More room to scale
Altron Arrow
Power Electronics / Power Management
With the latest STM32H5 lines from STMicroelectronics, you can now scale within the same platform, from a compact 1 Mbyte device to higher-memory MCUs for graphics-rich and feature-heavy designs.
Read more...
Surface mount power amplifier for high-power applications
RF Design
Power Electronics / Power Management
The GNA-63-5W+, from Mini-Circuits, is a GaN MMIC Power Amplifier (PA) designed for demanding RF applications requiring high efficiency, excellent linearity, and a compact footprint.
Read more...
1200 V QSiC modules
Power Electronics / Power Management
SemiQ Inc has launched the QSiC Dual3, a family of 1200 V half-bridge MOSFET modules for motor drives in data centre cooling systems, grid converters in energy storage systems, and industrial drivers.
Read more...
MCOTS transient filter for military applications
RFiber Solutions
Power Electronics / Power Management
SynQor has announced the new MCOTS-F-28-T-HE transient half-brick filter, the latest addition to its MCOTS product family.
Read more...
Expanded range of high-thermal-performance QSiC modules
Power Electronics / Power Management
SemiQ’s half-bridge series for data centre power converters and industrial motor drives features low RDSON SiC MOSFETs and parallel SBD diodes for best-in-class power density and conversion efficiency.
Read more...
Transporting lithium batteries and IoT devices
Power Electronics / Power Management
With billions of rechargeable and non-rechargeable lithium cells and batteries powering most of the world’s consumer and industrial electronic devices, shipping them to customers through vast global logistics chains is often an overlooked topic.
Read more...
Setting a new benchmark for high-power DC load testing
Conical Technologies
Test & Measurement Power Electronics / Power Management
The new ITECH IT8900G/L high-speed, high-power DC electronic load offers a powerful combination of speed, scalability, precision and high-power density.
Read more...
Quality batteries are critical for IIoT
Uniross Batteries
Power Electronics / Power Management
Batteries intended for use in industrial operations must indeed offer complete reliability under extreme environmental conditions, resistance to vibration and harsh environments.
Read more...
printer friendly version