Diodes Inc introduces ZLPM8000 family of STB power-management and control ICs


For energy-efficient set-top-boxes, TVs with satellite tuners, and PC satellite tuner cards

In standby mode the ZLPM8000 series STB power-management controllers draw only 600 μA.

Diodes Inc has announced the introduction of a family of low power LNB (low noise block) power-management and control ICs for use in STBs (set-top boxes), TVs with built-in satellite tuners, and PC satellite-tuner cards. Designed to increase product efficiency and reliability, the ZLPM8000 series ICs offers manufacturers flexibility to address global satellite TV standards. The company has initially released three single-output members of the IC family: The 750 mA ZLPM8010 and 450 mA ZLPM8011 are full-featured controllers and support DiSEqC1 and DiSEqC2 standards. The 450 mA ZLPM8012 controller offers a reduced feature set and supports the DiSEqC1 standard only. To increase overall STB system efficiency, the ICs' low quiescent current boost converter operates from a standard 12V power rail and employs a 270-m?-RDS(on) MOSFET power switch. In turn, the converter supplies a 500-mV-dropout LDO regulator, providing control signals and low-noise power output to the LNB. In standby mode the ZLPM8000 series STB power-management controllers draw only 600 μA. The LNB supply generated by the ZLPM8000 series is highly programmable, being configurable in 0.25V steps from 10.25 V through to 19.5 V enabling designers to match with any system architecture and adjust for cable drops or poorly performing LNBs. The devices' integral protection and diagnostic features include over-current limit, line short and open circuit, over temperature shutdown, and under voltage alerts. An integrated 22 kHz tone generator provides for DiSEqC and traditional band switching control that is reliable even under no-load conditions. To enable two-way communication between LNB and STB, the ZLPM8010 and ZPLM8011 include the Zetex LNB DiSEqC receive technology, which allows high-reliability detection of a wide range of signals while assuring excellent signal rejection. Fully configurable via I2C interface or standard logic inputs, the ZLPM8000 series devices are easily tailored to handle regional variations in satellite TV standards. Using the I2C port, designers can access an array of device functionality, including LNB control, output adjustment, a four-level current limit, low-current standby and various line check features. The three devices in the ZLPM8000 product line are provided in the compact 20-lead, 4 x 4 mm QFN package and are pin-compatible, enabling product designers to change the IC to match local market requirements without having to modify PCBs. The ZLPM8000 series of STB power management and LNB control ICs is priced from $1.20 (1000). www.diodes.com