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:
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