20A Communication/ Enterprise Storage ASIC Adaptive Voltage Scaling Power Supply PMBus Ref. Design

(ACTIVE) PMP10778

Description & Features

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Description

This is a 20A Communication or Enterprise Storage ASIC Adaptive Voltage Scaling (AVS) power supply using the TPS53819A PMBus PWM controller. The design enables high power density, PCB layout flexibility and ease of test and design for AVS using the PMBus interface and the Vout Adjustment and Margining Commands. The use of the external Power Block enables flexible PCB placement and upgrade to newer power blocks if needed.

Features
  • Twenty nine (29) total components for a 20W power supply
  • 672mm² PCB power supply area
  • 34.1°C case temperature at 20A load (12VIN, 290KHz).
  • ~89% peak efficiency, >85% efficiency at 12VIN, 1Vout, 290KHz
  • Less than ±8mV peak-to-peak output voltage ripple at 20A load (12VIN)
  • Less than ±30mV peak-to-peak output voltage change in response to 12A load transient at 20A/us slew rate

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Schematic/Block Diagram

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Design Files

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Bill of Materials (BOM)

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Parametrics
 PMP10778.1
(Output Voltage 1)
Vin (Min) (V)10.8
Vin (Max) (V)13.2
Vout (Nom) (V)1
Iout (Max) (A)20
Output Power (W)20
Isolated/Non-IsolatedNon-Isolated
Input TypeDC
TopologyBuck- Synchronous
Designed forASIC

TI Devices (2)

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Part Number Name Product Family Sample & Buy Design Kits & Evaluation Modules
CSD87350Q5D  Synchronous Buck NexFET™ Power Block MOSFET Pair  MOSFETs  Sample & Buy View Design Kits & Evaluation Modules
TPS53819A  3V to 28V Input, 40A, Eco-Mode™, D-CAP2™ Synchronous Buck Controller with PMBus™   Step-down (buck)  Sample & Buy View Design Kits & Evaluation Modules

CAD/CAE symbols

Part # Package | Pins CAD File (.bxl) STEP Model (.stp)
CSD87350Q5D LSON-CLIP (DQY)| 8 Download Download
TPS53819A Download Download

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Technical Documents

View the Important Notice for TI Designs covering authorized use, intellectual property matters and disclaimers.

User guides (1)
Title Abstract Type Size (KB) Date Views
PDF 588 18 Feb 2015 8
Selection guides (1)
Title Abstract Type Size (KB) Date Views
PDF 974 10 Nov 2015 67
Design files (4)
Title Abstract Type Size (KB) Date Views
ZIP 875 18 Feb 2015 10
PDF 83 18 Feb 2015 4
PDF 105 18 Feb 2015 4
PDF 207 18 Feb 2015 10

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