Quad-output power supply IC
18 March 2009
Power Electronics / Power Management
As electronics manufacturers pack more and more features into smaller devices, space is at a premium in the power supply housing, as well as on the system board. To help developers design compact power supplies, Freescale has added the MC34700 power supply IC to its portfolio of power management products optimised for space-constrained high-voltage and high-power applications.
The MC34700 is a 9,0 V to 18 V quad-output integrated MOSFET device designed to reduce the complexity and streamline the development of power supplies. It is available in a 32-lead 5 x 5 mm QFN package, enabling the ability to generate up to four power rails in a small-footprint design. The wide input voltage range makes the device suitable for applications with a nominal 12 V supply. The MC34700 features ample operating margin in systems where the 12 V supply is only 20% accurate.
Channel 1 is a non-synchronous switching regulator; channels 2 and 3 are synchronous switching regulators; and channel 4 is a low-dropout linear regulator. All switching channels feature voltage-mode control with external compensation, allowing power supplies to be tailored to a wide variety of output regulation and transient performance requirements.
The MC34700’s four output channels feature programmable output voltages over a wide range. The output of channel 1 can be programmed from 2,0 V to 5,25 V, and the outputs of channels 2 through 4 can be programmed from 0,7 V to 3,6 V. This programming flexibility enables generation of power rails for a multitude of downstream components such as microprocessors, microcontrollers, memory ICs, low-voltage motors and small LCD panels.
The MC34700 features over-voltage, under-voltage, over-current and over-temperature protection. The device's fixed switching frequency, internal soft-start and internal power MOSFETs enable rapid power supply design and development by eliminating the need to consider such variables as optimal switching frequency, soft-start time and power MOSFET on-resistance.
Target applications include set-top boxes, cable modems, laser printers, fax machines, point-of-sale terminals, small appliances, telecom line cards and DVD players.
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...
printer friendly version