Product category:
Power Supply ICs and Controllers
News Release from: NXP Semiconductors | Subject: SA56202
Edited by the Electronicstalk Editorial
Team on 31 July 2003
Data drive motor IC stays cool with
active braking
The Philips SA56202 is claimed as the industry's smallest motor driver IC for high-speed DVD+RW (rewritable) applications.
The Philips SA56202 is claimed as the industry's smallest motor driver IC for high-speed DVD+RW (rewritable) applications The driver is approximately half the size of competing solutions, with a small footprint that is ideal for such portable consumer and data applications as DVD+RW recorders and data drives for the PC market
This article was originally published on Electronicstalk on 23 Oct 2001 at 8.00am (UK)
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To meet the changing performance demands of this quickly growing market, the SA56202 motor driver has been designed to support drive speeds of 8x and 16x speeds, offering drive manufacturers a quick transition to next-generation technology.
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The SA56202 motor driver is used in the Philips Nexperia reference design for 8x DVD recordable applications that facilitate customer design-in and system development, while accelerating time to market.
"The SA56202 motor driver was selected for our new DVD+R/+RW data drive architecture because it can deliver the superior performance we need for current and future products", said Frank Simonis of Philips Optical Storage.
"Based on this architecture, we are able to create new products quickly with higher write speeds (4x to 8x and above) and stay competitive in the data drive markets".
At high speeds, thermal management presents a substantial challenge for designers of portable consumer and data applications.
To overcome this challenge, the patented Philips design integrates active braking technology - the industry's fastest, most efficient form of braking - into the SA56202.
With active braking in the SA56202, disks can brake from full speed to a complete stop in a linear, controlled manner.
In fact, the SA56202 can brake to a full stop in approximately half the time of competing solutions (from 11,320 to 0rev/min in only 2.8s).
The Philips SA56202 also has a user-selectable current limiter, to limit thermal dissipation during (fast) braking.
Furthermore, with the Philips device, the braking energy is recuperated by transferring it back to the power supply, resulting in less heat dissipation during braking and better overall performance.
This is in contrast to competing drivers that employ "short" braking and dissipate the braking energy into the driver device itself as heat.
This wasted heat in the driver poses a serious risk of thermal shutdown or breakdown.
The 56-pin HTSSOP Philips motor driver IC has a footprint of only 6.1 x 14mm.
To house an IC in a package this small, it is necessary to use a special process to deliver high performance and small form factor.
By using an advanced BCDMOS (bipolar-CMOS-DMOS) process, different aspects of the chips can be optimised - such as delivering the required high voltage (12V) outputs along with the drive strength and response of the integrated drivers in a small form factor.
Samples of the SA56202 motor driver are available now.
Volume production is scheduled for August 2003.
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