Power_electronics Features

Integrated GaN Power Stage for eMobility - issue 2/2020
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Linear voltage regulators operate at automotive temperatures
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Power Electronics Europe News
DC/DC power modules boast highest in class power density

The dual ISL8274M operates from a 5.0 or 12V power rail, provides two 30A outputs and up to 95.5 per cent peak efficiency in a compact 18 x 23mm2 footprint. The ZL9024M operates from a 3.3V rail and outputs 33A of power in a 17 x19mm2 footprint. They deliver point of load (PoL) conversions for advanced FPGAs, DSPs, ASICs and memory used in servers, telecomms, datacomms, optical networking and storage equipment, claims the company. Both devices are PMBus-configurable power supplies and include a controller, MOSFETs, inductor and passives encapsulated inside a module designed to increase available board space and reduce component count and costs.


The digital power modules use the company’s ChargeMode control architecture, claimed to provide the highest efficiencies with better than 90% on most conversions. The power modules provide a single clock cycle fast transient response to output current load steps common in FPGAs and DSPs that process power bursts. The compensation-free design keeps the modules stable regardless of output capacitor changes due to temperature, variation or aging, adds the company.


The ISL8274M supports input voltages from 4.5 to 14V. The ZL9024M accepts input voltages from 2.75 to 4.0V. Both modules offer adjustable output voltages as low as 0.6V.


The encapsulated modules use Renesas’ proprietary High Density Array (HDA) package, which uses a single-layer conductive substrate to reduce lead inductance and dissipate heat primarily through the system board. The HDA’s copper lead-frame structure allows the modules to operate at full load with no airflow or heatsinks.


The modules’ protection portfolio includes programmable Vout, soft-start, soft-stop, sequencing, margining and under-voltage, over-voltage, under-current, over-current, under temperature and over-temperature. They also monitor Vin, Vout, Iout, temperature, duty cycle, switching frequency, and faults.


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