Digital Controllers Deliver Efficient Point-of-Load Power Conversion

The FD200x digital power controllers combine digital loop control with highly-integrated power-management capabilities to offer efficient power delivery from light to full load.

Incorporating an innovative Digital-DC™ power conversion architecture, these products dynamically optimise efficiency as system-conditions change.The FD2004, FD2004-01 and FD2006 digital power controllers, and the FD1505 driver, form universal power building blocks.

The controllers operate with a wide input-voltage range from as low as 3.0V and up to 14V and control output voltages as low as 0.54V and as high as 5.5V.

The FD2004 controller can interface with an external driver, MOSFET ICs and powertrain modules to provide power-stage design flexibility. The FD2004-01 provides similar functionality but with DC output voltage set-point accuracy of ±0.2%.

The FD2006, however, integrates a controller with 3A MOSFET drivers, and can support loads in excess of 40A without an external driver.

These products deliver accurate power with the ever-increasing voltage-regulation accuracy required by the latest embedded processors and ASICs. All of these controllers include on-board serial ports compliant with I²C and SMBus, and support the industry-standard PMBus™ command set.

The FD1505 is an N-channel synchronous-buck MOSFET driver specifically designed for use with the FD2004 and FD2004-01. The FD1505 has dual PWM inputs that take advantage of the dynamic dead-time optimisation provided by the controllers to maximise power-conversion efficiency. The device combines +5A/-4A low-side drive with ±3A high-side drive and up to 7.5V gate drive to enable efficient operation at high step-down ratios and switching frequencies. The FD1505 also provides an adjustable gate-drive current feature, which allows configurations that provide 50% or 100% of the full rated drive current.

 

FEATURES 4.5V to 14V input range 0.54V to 4V output range ± 1% output voltage set-point accuracy Current sharing and phase interleaving Digitally adjustable current-sense range Snapshot™ parametric capture mechanism 5mm x 5mm QFN package Digital soft-start and stop Precision delay and ramp-up Voltage tracking, sequencing and margining Voltage, current and temperature monitoring Internal non-volatile memory

APPLICATIONS Communication and computing applications Embedded computing Servers and storage equipment Power supplies targeting Energy Star and Climate Savers Computing guidelines

 

 

• NIC Components’ NPISxxL, page 090108
• Vishay’s PowerBridge™ rectifiers, page 090111

 

Fairchild / FD200x & FD1505