Commercial envelope tracking chip
21 February 2012
Nujira has launched the first IC in its Coolteq.L family of Envelope Tracking power supply modulators.
Nujira’s NCT-L1100 reduces wasted energy from power amplifiers (PAs) in mobile handsets by more than 50%, cutting heat dissipation and extending battery life.
The improved spectral efficiency of the 4G LTE standard enables higher data bandwidth, but comes at the price of reduced energy efficiency in the RF PA. Further penalties come from an increase in the average RF power transmitted from the handset, and the need to support an increasing number of frequency bands in the phone to support global roaming.
This not only impacts on battery life, but also on handset temperature; a growing problem for smartphone designers. Unaddressed, these issues will degrade the user experience and delay the adoption of 4G smartphones.
Nujira’s NCT-L1100 demonstrates power conversion efficiencies in excess of 80% and supports the maximum 20MHz channel bandwidth of LTE - the best available on the market today.
The technology has already been validated through system integration with two major platform chipset vendors, and Nujira will be demonstrating the NCT-L1100 at Mobile World Congress in Barcelona, Spain, from 27 February – 1 March.
The new Coolteq.L chip is compatible with multiple air interface standards, including TDD and FDD LTE. Nujira’s ISOGAIN linearisation technology delivers improved ACLR and EVM performance, eliminating antenna load mismatch and providing additional output power from the PA. The NCT-L1100 features the industry-standard OpenET analogue envelope interface, and a MIPI RFFE control interface.
Production devices will be available in small footprint WLCSP packages. Nujira provides platform chipset vendors with evaluation boards and engineering support for integration into reference designs for smartphones and data devices.
The NCT-L1100 is sampling now to lead partners with general availability in Q4 2012.
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