Dual-output PWM buck regulators

30 April 2008 Power Electronics / Power Management

ON Semiconductor has introduced the NCP312x family of dual-output pulse width modulation (PWM) buck regulators that offer advanced auto-tracking and sequencing capabilities. Featuring integrated MOSFETs that deliver 2 A - in the 3120 and 3122 - or 3 A - in the 3121 and 3123 - output current with switching frequency up to 2,2 MHz, the new devices are ideal for a variety of consumer applications including set-top boxes (STB), LCD-TVs and cable modems.

The auto-tracking and sequencing features of the devices enables exact timing and control over both output channels. A digital signal processor (DSP), field programmable gate array (FPGA) or other signal processor requires multiple power supplies generating different voltage levels for core and iInput/output (I/O) peripherals, and specific timing of each voltage. This timing control prevents latch-up conditions that can cause immediate damage or even latent damage that produces failures in the field. The 312x devices offer programmable ratiometric, sequential and tracking control to manage the output voltage behaviour during start-up and power-down. Additionally, multiple devices can be daisy-chained together to control multiple outputs.

These converters reduce input capacitance requirements by switching 180° out-of-phase at frequencies between 200 kHz and 2,2 MHz. The out-of-phase operation allows the use of a single low-cost electrolytic capacitor or ceramic capacitor for the input filter versus two capacitors in a standard configuration. The outputs can also be paralleled to provide a dual-phase, single output regulator with low ripple voltage.

Further reading:

Zero drift current shunt monitors
Altron Arrow Power Electronics / Power Management
The NCS21671 and NCV21671 from onsemi are a series of voltage output current sense amplifiers offered in gains of 25, 50, 100, and 200 V/V.

Read more...

---

Schneider Electric partners with Drakenstein Municipality
Schneider Electric South Africa Power Electronics / Power Management
Drakenstein Municipality, situated in Paarl in the Western Cape, is one of the first distribution utilities globally to implement Schneider Electric’s green, SF6-free RM AirSeT switchgear with pure air technology and native digital connectivity.

Read more...

---

E-Mobility: navigate safety, interoperability and conformance
Concilium Technologies Power Electronics / Power Management
Although the concept of electric vehicles is not a new one, the market remains in its infancy, and is not well-regulated or fully operational. This presents a number of challenges for manufacturers throughout the EV and EVSE ecosystem.

Read more...

---

Webinar: Decarbonise with industrial drives
Power Electronics / Power Management
Infineon's TRENCHSTOP IGBT7 and CoolSiC technologies increase the efficiency of your industrial drive design, ultimately resulting in cost savings for you, and a more sustainable future for all.

Read more...

---

Analysis of switch-mode power supply: inductor violations
Altron Arrow Editor's Choice Power Electronics / Power Management
Common switch-mode power supply (SMPS) design errors are discussed, and their appropriate rectification is specified, with details on complications that arise with the power stage design of DC-DC switching regulators.

Read more...

---

Compact PCB-mount SMPS
RS South Africa Power Electronics / Power Management
Traco Power’s 5W PCB-mount switch mode power supply (SMPS) offers high efficiency, and is well suited for a variety of applications in the automation, electronics, electrical and mechanical industries.

Read more...

---

AC-DC brick PSU
Conical Technologies Power Electronics / Power Management
These PSUs have a typical efficiency of up to 92%, and a power factor value of up to 0,99. They are available in 12, 24, 28, 48 and 54 V output versions.

Read more...

---

5 kW switching PSU range
Conical Technologies Power Electronics / Power Management
Mornsun has released a new switching power supply range, the LMF5000-25Bxx, which has a 5000 W capacity, and features universal AC input configurations.

Read more...

---

Reliable charging range
Current Automation Power Electronics / Power Management
Whether you’re powering essential electronics, keeping emergency equipment operational, or maintaining the performance of critical machinery, the need for dependable charging solutions cannot be overstated.

Read more...

---

Microchip expands its mSiC solutions
EBV Electrolink Power Electronics / Power Management
The highly integrated 3,3 kV XIFM plug-and-play digital gate driver is designed to work out-of-the-box with high-voltage SiC-based power modules to simplify and speed system integration.

Read more...

---