AC/DC Power Supply - Single Analog Controller

Block diagram (SBD) Server AC/DC Power Supply and Telecom Rectifier using TI’s Analog PFC and PWM controllers, High performance drivers and transceivers.

Block Diagram

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Reference Designs

Description

The challenges faced by AC/DC power supply developers today are achieving high power factor, low THD, and high efficiency across line and load conditions, high power density or reduced size, high reliability, and low system cost. Advanced power topologies such as interleaved PFC, bridgeless PFC, phase-shifted full-bridge DC/DC, LLC resonant DC/DC, and ZVS PWM DC/DC are commonly employed in today’s designs addressing these needs. Most AC/DC power supplies use dual PWM controllers, a PFC controller and a DC/DC controller. But, there are low-power and cost-sensitive designs that use single analog controller or combo PFC and DC/DC controller to reduce component count and BOM cost.

TI's Combination PFC/PWM controllers provide complete control functionality for any off-line power system requiring compliance with the IEC1000-3-2 harmonic reduction requirements. By combining the control and drive signals for the PFC and the PWM stages into a single device, significant performance and cost benefits are gained. These devices offer performance advantages over earlier generation combination controllers. A key PWM feature is programmable maximum duty cycle. For the PFC stage, the devices feature an improved multiplier and the use of a trans-conductance amplifier for enhanced transient response.

The family of UCC27xxx MOSFET drives includes a complete range of single and dual low-side MOSFET drivers ranging from 2A to 9A sink and source. They are available in complimentary, inverted and non-inverted varieties.

TI's Integrated Hot Swap Power Controllers are optimized for nominal -48V systems. The devices provide load current slew rate control and peak magnitude limiting.

Most of the Hot Swap Controllers have digital interface for precise programming and monitoring and also have Power good and fault outputs.

Other high-performance analog parts are also available to provide critical system functions and features such as sensor feedback, isolation, communication transceivers.

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Application Notes (12)

Title Abstract Type Size (KB) Date Views
HTM 8 KB 20 Sep 2013 212
HTM 8 KB 13 Apr 2011 417
HTM 9 KB 22 Jan 2011 2676
HTM 9 KB 08 Jul 2010 951
HTM 8 KB 18 Jun 2009 927
HTM 8 KB 09 Apr 2009 299
HTM 8 KB 01 May 2008 217
HTM 8 KB 28 Feb 2005 89
HTM 8 KB 28 Feb 2005 180
HTM 8 KB 21 Aug 2002 498
HTM 8 KB 05 Sep 1999 421
HTM 8 KB 05 Sep 1999 1394
    

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