Product category:
Power Supply ICs and Controllers
News Release from: ON Semiconductor | Subject: NCP5387 and NCP5382
Edited by the Electronicstalk Editorial
Team on 05 April 2007
Dual-edge PWM controllers are dynamic
performers
Multiphase buck controllers address power needs for servers and for VR10.x, VR11.0 and parallel VID based desktop personal computers.
ON Semiconductor has expanded its power computing portfolio with the introduction of two new dual-edge multiphase controllers The NCP5387 and NCP5382 multiphase buck controllers address power needs for servers and for VR10.x, VR11.0 and parallel VID based desktop personal computers
This article was originally published on Electronicstalk on 31 Mar 2003 at 8.00am (UK)
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"We are pleased to expand our innovative dual-edge technology - and the corresponding efficiency and board space benefits - to additional sectors of the computing market", said Bill Schromm, Senior Vice President and General Manager of ON Semiconductor's Computing Products Group.
"Our dual-edge control technology is changing the way the industry approaches computing power supply design".
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"The fact that our controllers improve power efficiency by up to 3% is a significant advancement that has been welcomed by our customers".
Using the company's dual-edge pulsewidth modulation (PWM) technology, the new devices deliver significantly faster response to load transients than existing industry solutions.
As such, they enable power management subsystems to more quickly and more efficiently respond to users' activation of high-performance computing functions.
Industry standard single-edge and clocked control devices in place today require operation at higher-than-optimal frequencies or use of substantial capacitive hold-up circuits.
ON Semiconductor's dual-edge approach is less complicated to design-in, and enables a physically smaller power management subsystem than single-edge or clocked control devices can provide.
By enabling simultaneous switching of all phases in a multiphase power waveform, ON Semiconductor's dual-edge PWM controllers also provide faster responses than single-edge or clocked control devices.
This improved response enables the power management subsystem to operate at a lower frequency, with fewer hold-up capacitors than existing leading-edge or trailing-edge approaches.
The new NCP5387 and NCP5382 are multiphase buck controllers that combine differential voltage and current sensing, and adaptive voltage positioning.
Dual-edge pulsewidth modulation, combined with inductor current sensing, reduces system cost by providing the fastest initial response to transient load events.
Dual-edge multiphase modulation reduces total bulk and ceramic output capacitance required to satisfy transient load line regulation.
A high performance operational error amplifier is provided, which allows easy compensation of the system.
The proprietary method of dynamic reference injection makes the error amplifier compensation virtually independent of the system response to VID changes, eliminating tradeoffs between overshoot and dynamic VID performance The NCP5387 is a two-, three- or four-phase controller, suitable for VR10.x, VR11.0 and parallel VID desktop computing systems.
The NCP5387 is available in a Pb-free QFN-40 package, and priced at US $1.27 per unit in 2500-unit quantities.
The NCP5382 is a four-, five- or six-phase controller, suitable for servers and other low-voltage, high-current power supplies.
The NCP5382 is available in a Pb-free QFN-48 package, and priced at US $1.75 per unit in 2500-unit quantities.
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