High-voltage switching regulators

19 November 2014 Power Electronics / Power Management

ON Semiconductor has added three new current mode, fixed frequency switching regulators to its expansive power management product portfolio. Targeted at use in compact, high-reliability offline AC-DC switched-mode power supplies, they incorporate an avalanche-rated 650 V MOSFET and frequency foldback along with skip mode that improve light-load and standby efficiency, meeting the Energy Star EPS 2.0 standard.

The high degree of integration results in minimal external components and reduces the overall bill of materials, making the devices highly suited to power system designs for household appliances, DVD players and set-top boxes. The NCP1129, NCP1126 and NCP1124 can deliver up to 25 W, 15 W and 12 W respectively, and each generate a jittered 65 kHz or 100 kHz switching frequency, resulting in marked improvements in electromagnetic interference (EMI) performance.

It is possible for the maximum peak current to be adjusted via an external resistor, facilitating ramp compensation, so that stable continuous conduction mode (CCM) operation can be maintained. The frequency foldback mode permits power conversion efficiency levels to be raised under light load conditions, while skip mode can be activated to reduce standby power consumption at (or close to) a no-load scenario – with less than 100 mW drawn at high line when in standby mode.

The NCP112x devices all have a wide array of protective features including a 50 ms timer based, auto-recovery short circuit protection function. Furthermore, short-circuit fault conditions can be independently detected from the auxiliary winding voltage, thereby ensuring that comprehensive safeguards against short circuit events are in place.

The devices incorporate built-in thermal shutdown and over-voltage response mechanisms, as well as a 2 kV human body model (HBM) resilience rating to electrostatic discharge. They come in lead-free PDIP-7 packages that support an operational temperature range of -40°C to +150°C.

For more information contact Arnold Perumal, Avnet Kopp, +27 (0)11 319 8600, [email protected], www.avnet.co.za

Further reading:

Finding value for money with your IoT battery
Uniross Batteries Power Electronics / Power Management
Designing an IoT application involves a lot of choices. Designers are looking for performance and quality, but need to balance those alongside a low Total Cost of Ownership.

Read more...

---

Powering the IoT
Uniross Batteries Power Electronics / Power Management
Choosing the right battery is not simply a technical detail, but a defining factor in the longevity and cost-effectiveness of any IoT deployment.

Read more...

---

The move to DC infrastructure
IOT Electronics Power Electronics / Power Management
The shift toward direct current infrastructure in data centres is accelerating as operators pursue higher efficiency, improved reliability, and stronger alignment with renewable energy goals.

Read more...

---

Power inductor for automotive applications
Würth Elektronik eiSos Power Electronics / Power Management
The WE-MXGA inductor features RDC values up to 25% lower and a saturation current up to 47% higher compared to other components currently available on the market.

Read more...

---

High-performance DC-DC converter
Conical Technologies Power Electronics / Power Management
With a wide 9 - 40 V DC input range, the Claf Power DWHB400-F24xxN series is a high-performance DC-DC converter family ideally suited for 12 V and 24 V battery-based systems including vehicles, off-grid installations, and distributed power architectures.

Read more...

---

DC-DC converters for next-generation IoT
iCorp Technologies Power Electronics / Power Management
AIPUPOWER’s K78XXJT-500R3 and K78XXJT-500R3-LB give designers a compact, high-efficiency power option for battery-powered and space-constrained systems, combining up to 96% efficiency with no-load input current as low as 0,2 mA.

Read more...

---

240 W in compact form factor
Brabek Power Electronics / Power Management
The cost-effective and reliable RECOM RACPRO1-S240E DIN-rail mount AC-DC series is only 125 x 139 mm and 39 mm wide, yet provides 240 W output.

Read more...

---

You cannot manage what you cannot measure
Power Electronics / Power Management
South African sites are generating solar energy. Most still have no idea what is consuming it… or when, or why. Intelligent load management hardware is changing that.

Read more...

---

Scalable and intelligent power solution
Power Electronics / Power Management
Designed for Africa’s rapidly evolving energy landscape, Bluetti’s ES125 offers a scalable, intelligent power solution that delivers reliable and cost-efficient electricity for uninterrupted operations.

Read more...

---

Simulating grid abnormalities
Conical Technologies Power Electronics / Power Management
Simulating grid abnormalities has become an essential part of validating systems such as inverters, UPS units, photovoltaic inverters, and EV charging infrastructure.

Read more...

---