Programmable logic device adds high voltage mosfet control for hot swap applications

Lattice Semiconductor has introduced higher performance versions of its Power Manager II product family. The ispPAC-POWR1014-2 and ispPAC-POWR1014A-2 devices integrate higher voltage charge pumps with programmable current to control MOSFETs in hot swap and sequencing applications. The on-chip charge pump generates up to 12V, enabling these devices to integrate 5V hot swap controllers using MOSFETs with higher gate threshold voltages.

Pin compatible with existing Power Manager II devices, the devices integrate multiple power management components, including hot swap controllers, reset generators, voltage supervisors, sequencers and trackers. The ispPAC-POWR1014A-2 device also integrates a 10bit analog to digital converter (ADC) for power supply voltage measurements, controlled through a standard I2C interface. This feature enables a microcontroller to read the status of all the comparators, inputs as well as outputs.

Shyam Chandra, Lattice's Product Marketing Manager for mixed signal devices says that in a board with six or more power supplies, Lattice's existing Power Manager II devices could represent cost savings of up to 30% over traditional single function ICs, whilst Lattice's hot swap-enabled devices could potentially save users up to 40%.

As with previous Power Manager II devices, the POWR1014-2 integrates a 24 macrocell PLD and dual voltage monitoring comparators with a 0.3% accuracy. Both the POWR1014-2 and POWR1014A-2 devices operate across a wide range of power supply voltages from 2.8V to 3.96V. Lattice intends the ispPAC-POWR1014-2 for consumer, telecom and automotive applications, including customer premises equipment, plasma TVs and in-cabin multimedia. Meanwhile, the POWR1014A-2 device addresses Advanced Mezzanine Cards, PrPMC, basestation line cards, edge router line cards and servers – all applications that require power supply voltage measurement in addition to standard power management functions.

Lattice's PAC-Designer Software, Version 5.2 (available for free download here) can be used to implement designs using the ispPAC-POWR1014-2 / POWR1014A-2. This latest version adds HDL export features, enabling users to simulate and then verify sequence and supervisory logic using the Aldec Active-HDL Lattice Web Edition simulator (available for free through the download link above).

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