News & Events
Intersil's New PWM Controllers for AC-DC and DC-DC Conversion Lead Industry in Performance Above All Competing Devices
-- Industry-leading controllers offer faster error amp, faster current sense, highest accuracy, highest direct MOSFET drive and industry standard pin-for-pin compatibility
MILPITAS, CA, August 16, 2004 Intersil Corporation (NASDAQ: ISIL), a world leader in the design and manufacture of high performance analog solutions, today announced the release of the ISL6840 through ISL6845 family of industry-leading single-ended current-mode PWM controllers designed to improve performance of AC-DC and 48 volt DC-DC converters widely used in telecom, datacom, and server applications. Devices in the ISL684x family are high-performance pin-for-pin upgrades for industry standard products. The ISL684x family is the fastest and most accurate industry-standard PWM controllers in the world, said Randy Roberts, director of Intersils Broadband Power Products. The high performance of these pin-for-pin compatible upgrades translates into lower manufacturing costs and improved performance for a wide range of AC-DC and DC-DC power supplies.
The ISL684x family PWM controllers offer many significant performance advantages. The 5 MHz error amplifier bandwidth is five times wider than existing products, enabling fast transient response, which reduces the need for expensive and bulky output capacitors. The very precise internal voltage reference with its one percent accuracy over line, load, and temperature is three times better than competing products and is accurate enough to replace an external voltage reference. The 40 nanosecond peak-current-sensing time is nearly twice as fast as the industrys next-best competing controller. This fast current sensing simplifies a power supply designers difficult job of reliably protecting against short-circuit faults.
The ISL684x familys 2 MHz switching frequency is two to four times faster than competing controllers and enables cost savings through the use of smaller filter components. The 1-ampere MOSFET gate drive capability enables efficient direct drive of MOSFETs, saving significant circuit costs over competing controllers.
The ISL684x family controllers are differentiated from each other by their internal under-voltage lockout levels and maximum duty cycles.
| Device | Under-voltage Lockout |
Maximum Percent Duty Cycle |
| ISL6840 | 7.0 | 100 |
| ISL6841 | 7.0 | 50 |
| ISL6842 | 14.4 | 100 |
| ISL6843 | 8.4 | 100 |
| ISL6844 | 14.4 | 50 |
| ISL6845 | 8.4 | 50 |
ISL684x Family Technical Summary
- Pin-for-pin performance upgrades for:
- UC3842 to 45, UCC38C40 to 45, MIC38C42 to 45, MIC38HC42 to 45
- Industrys widest error amplifier bandwidth - 5 MHz
- Industrys most accurate internal voltage reference - 1 percent, 2.5 V
- Industrys lowest current sense time - 40 ns
- Industrys fastest maximum switching frequency - 2 MHz
- Industrys highest output source and sink gate drive - 1 A
- Industrys fastest gate switching times - 40/40 ns
- Industrys widest operating temperature range - -40 to +105 degrees C
- Very low operating supply current of 3 mA and startup current of 100 uA
- Tiny 8-lead MSOP package and economical 8-lead SOIC package
The ISL684x family is available now. The suggested resale price for quantities of 100- to 999-unit quantities is $1.43 for the ISL684xIU (MSOP package) and $1.28 for the ISL684xIB (SOIC package). Both packages are available on tape and reel. 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.
