 |
 |
 |
 |
 |
 |
 |
 |
 |
 |
Intersil Releases Advanced Power and Control IC For Satellite TV Systems
Milpitas CA (SPX) Aug 10, 2004 Intersil has announced the ISL6421A, a new highly integrated solution for providing power and control signals from advanced set-top box (STB) units to the satellite dish low-noise block (LNB) down converter. This new power and control IC offers high integration to reduce space and costs, high power efficiency to reduce power dissipation and heat, and high reliability to ensure long service in customer premises equipment. The new ISL6421A contains both a high-efficiency current-mode boost PWM converter and a low-noise linear regulator, along with the circuitry required for I2C device interfacing and for providing DiSEqC standard control signals to the LNB. A regulated output voltage is available at the output terminal (VOUT) to support the operation of the antenna port in advanced satellite STB applications. The regulated output may be set to either 13 V or 18 V by use of an external pin (SEL18V) or the voltage select command bit (VSEL) through the I2C bus. Additionally, to compensate for the voltage drop in the coaxial cable, the voltage may be increased by 1V with the line length compensation bit (LLC) feature. "With the introduction of the ISL6421A, Intersil now offers the flexibility to integrate single (ISL6421A) or dual LNBs (ISL6405) with the same high integration, high efficiency, and high reliability into the latest set-top box designs," said Richard Powers, director of marketing for Intersil's Broadband Power Products. "Our ISL6405 dual-output low-noise block (LNB) down-converter supply and control voltage regulator IC is the first of its kind and was specifically designed to save satellite set-top box manufacturers board space, parts count and costs for their set-top boxes." The device can be put into a standby mode by means of the enable bit (EN), this disables the PWM and linear regulator combination and helps conserve power. The input to the linear regulator is derived from the current mode boost converter, such that the required voltage is the sum of the output voltage and the linear regulator drop (1.0V typical). This ensures that the power dissipation is minimized and maintains a constant voltage drop across the linear pass element, while permitting an adequate voltage range for tone injection. The device is capable of providing 450mA (typical). The over-current limit is digitally programmable to static or dynamic mode. Community Email This Article Comment On This Article Related Links Intersil SpaceDaily Search SpaceDaily Subscribe To SpaceDaily Express The latest information about the Commercial Satellite Industry
Stratos Steps Closer To Xantic Acquisition
Bethesda MD (SPX) Jan 5, 2006Stratos Global recently announced it had taken a step closer toward the completion of the acquisition of Xantic, having received positive advice from the Works' Council in the Netherlands, and executed a definitive agreement to purchase Xantic from KPN and Telstra Corporation. |
|
|
| The content herein, unless otherwise known to be public domain, are Copyright 1995-2006 - SpaceDaily.AFP and UPI Wire Stories are copyright Agence France-Presse and United Press International. ESA PortalReports are copyright European Space Agency. All NASA sourced material is public domain. Additionalcopyrights may apply in whole or part to other bona fide parties. Advertising does not imply endorsement,agreement or approval of any opinions, statements or information provided by SpaceDaily on any Web page published or hosted by SpaceDaily. Privacy Statement |
