18Vdc-60Vdc Input, 3.3V/15A Active Clamp Forward, 1/8 Brick Reference Design

(ACTIVE) PMP8973

Description & Features

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Key Document

Description

The PMP8973 reference design generates a 3.3V/15A output from an 18V to 60V telecom input. The UCC2897A controls an active clamp forward converter power stage. The low gate charge and low RDSon of the CSD16415Q5 and CSD18502Q5B, implemented as synchronous rectifiers, provides for a highly efficient design. This design is laid out in a standard eighth brick footprint and achieves peak efficiencies over 92%.  It includes remote sensing of the output voltage.

Features
  • Peak efficiency > 92%
  • Remote sensing of output voltage
  • Wide 18V-60Vdc input range
  • Compatible with standard 1/8 (eight) brick footprint
  • Test report available

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Schematic/Block Diagram

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Design Guide

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Design Files

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Bill of Materials (BOM)

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Parametrics
 PMP8973.1
(Output Voltage 1)
Vin (Min) (V)18
Vin (Max) (V)60
Vout (Nom) (V)3.3
Iout (Max) (A)15
Output Power (W)49.5
Isolated/Non-IsolatedIsolated
Input TypeDC
TopologyForward- Active Clamp
Forward- Synchronous

TI Devices (6)

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Part Number Name Product Family Sample & Buy Design Kits & Evaluation Modules
CSD16415Q5  N-Channel NexFET Power MOSFET   MOSFETs  Sample & Buy Not Available
CSD18502Q5B  40-V, N-Channel NexFET™ Power MOSFET  MOSFETs  Sample & Buy Not Available
CSD19533Q5A  100V, 7.8mOhm, SON5x6 N-Channel NexFET™ Power MOSFET  MOSFETs  Sample & Buy Not Available
LM4041D12  1.2-V Precision Micropower Shunt Voltage Reference, 1.0% accuracy  Voltage references  Sample & Buy Not Available
TLV272  550-uA/Ch 3-MHz Rail-to-Rail Output Operational Amplifier  Operational amplifiers (op amps)  Sample & Buy View Design Kits & Evaluation Modules
UCC2897A  Advanced Current-Mode Active Clamp PWM Controller  Offline & isolated DC/DC controllers & converters  Sample & Buy View Design Kits & Evaluation Modules

CAD/CAE symbols

Part # Package | Pins CAD File (.bxl) STEP Model (.stp)
CSD16415Q5 Download Download
CSD19533Q5A VSONP (DQJ)| 8 Download
LM4041D12 Download Download
Download Download
Download Download
TLV272 Download Download
Download Download
Download Download
UCC2897A 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 TI Recommends
PDF 3528 16 Jul 2015 10
Design files (4)
Title Abstract Type Size (KB) Date Views
ZIP 222 16 Jul 2015 8
PDF 150 16 Jul 2015 5
PDF 82 16 Jul 2015 7
PDF 144 16 Jul 2015 17

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