News & Events
Intersil Launches Two High-Performance Zero-Voltage Switching (ZVS) Full-Bridge PWM Controllers
—The ISL6752 and ISL6753 are designed with a proven ZVS control algorithm that is inherently simpler and less expensive than existing solutions, while still yielding excellent performance~—Intersil power management products will be on display at the APEC show in Austin this week. ~Visit the APEC Intersil booth, #702
MILPITAS, CA, March 7, 2005 Intersil Corporation (NASDAQ: ISIL), a world leader in the design and manufacture of high performance analog solutions, announced today two new high-performance, low pin count, zero-voltage switching (ZVS) full-bridge PWM controllers. The ISL6752 and ISL6753 are designed to optimize performance, cost and time-to-market for 400 watt and higher AC/DC switching power supplies. Packed with many protection and control features, the ISL6752 and ISL6753 are designed for file server, communication infrastructure and industrial equipment applications.
"Intersil has combined a straightforward IC architecture with our high-speed sub-micron process technology to offer these industry-leading solutions for today's demanding power supply designers," said Jeff Strang, product marketing manager for Intersils Isolated Power Products. "We focused on the two major shortcomings of existing ZVS full-bridge controllers high price and complexity and solved both with the ISL6752 and ISL6753. Our customers are already recording design wins with these easy-to-use and cost-effective PWM controllers."
The ISL6752 PWM is an excellent choice for ZVS full-bridge applications requiring adjustable synchronous rectifier drive, such as +12V output file server power supplies. For applications employing conventional output rectification, such as 48V output telecom rectifiers, the ISL6753 is the perfect PWM controller.
Intersil's advanced BiCMOS design gives these devices excellent performance including a very accurate over-current limit threshold and low operating current. Additionally, they feature an adjustable oscillator frequency up to 2MHz, internal over-temperature protection, precision dead time and resonant delay control, and short propagation delays. Multi-pulse suppression ensures alternating output pulses at low duty cycles where pulse skipping may otherwise occur. The ISL6753 features adjustable soft start to reduce voltage stresses and the ISL6752 includes synchronous rectifier outputs with adjustable timing.
ZVS Full-bridge Operation
The ISL6752 and ISL6753 are zero-voltage switching (ZVS) full-bridge PWM controllers. Rather than phase-modulating two half-bridges, as competing products do, the ISL6752 and ISL6753 drive the upper switches at a fixed 50 percent duty cycle while trailing-edge-modulating the lower switches. This approach yields excellent conversion efficiencies while greatly simplifying the architecture of the PWM controller.
ISL6752, ISL6753 Features
- Synchronous rectifier control outputs with adjustable delay/advance (ISL6752)
- Voltage or current mode operation (ISL6753)
- Adjustable resonant delay for ZVS operation
- Tight 3 percent current limit threshold
- Adjustable dead time control
- Low 175uA startup current o Internal under-voltage lockout
- Adjustable oscillator frequency up to 2MHz
- Internal over-temperature protection
- Buffered oscillator sawtooth output
- Fast current sense to output delay
- Adjustable cycle-by-cycle peak current limit
- Leading edge blanking - 70ns
- Multi-pulse suppression
Applications:
- ZVS full-bridge converters
- Telecom and datacom power
- Wireless base station power
- File server power
- Industrial power systems
The ISL6752 and ISL6753 are ELV, WEEE and RoHS compliant and are available now in a Pb-free 16-lead QSOP package. The suggested price in 1,000 unit quantities is $2.99 for each IC. You can learn more about these zero-voltage switching full-bridge PWM controllers and other high-performance power solutions online from Intersil's Power Management web site at: http://www.intersil.com/power/ About Intersil
Intersil Corporation, a NASDAQ 100 Index company, is a leader in the design and manufacture of high performance analog semiconductors. The company's products address three of the industry's fastest growing markets: flat panel displays, optical storage (CD and DVD recordable) and power management. Intersil products include power management devices for battery management, hot-swap and hot-plug controllers, linear regulators, supervisory ICs, switching DC / DC regulators and power MOSFET drivers; optical storage laser diode drivers; DSL line drivers; video and high performance operational amplifiers; data converters; interface ICs; analog switches and multiplexers; crosspoint switches; voice-over-IP devices; and ICs for military, space and rad-hard applications. For more information about Intersil or to find out how to become a member of our winning team, visit the company's web site and career page at www.intersil.com.
This release may include "forward looking statements" that are subject to risks and uncertainties. For information identifying economic, political, climatic, currency, regulatory, technological, competitive and some other important factors that could cause actual results to differ materially from those anticipated in the forward looking statements, see Intersil's Safe Harbor Forward Looking Statement disclaimer found at http://www.intersil.com/legal.asp, as well as Intersil's SEC filings as updated from time to time, found at http://www.sec.gov. All trademarks mentioned are the property of their respective owners.
