48V-60VDC Input, 12V/250W Active Clamp Forward Reference Design PMP9656 (ACTIVE)

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Key Document

Description

This reference design generates a 12V/21A output from 54V DC input. The UCC2897A controls an active clamp forward converter power stage. The low gate charge and low RDSon of the CSD18532Q5B, implemented as self-driven synchronous rectifiers, allow this design to achieve a max load efficiency of nearly 96%.  The compact UCC27511 drivers simplify the gate drive circuitry for the synchronous rectifiers.

Features
  • Over 95% efficiency at max load
  • 89% efficiency at 10% load
  • Low output ripple
  • Self-driven synchronous rectifiers (using CSD18532Q5B MOSFETs) reduce drive complexity
  • Generates regulated 12V bus for telecom or server applications
  • Low profile, less than 14mm max component height

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Design Files

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Parametrics
 PMP9656.1
(Output Voltage 1)
Vin (Min) (V)48
Vin (Max) (V)60
Vout (Nom) (V)12
Iout (Max) (A)21
Output Power (W)252
Isolated/Non-IsolatedIsolated
Input TypeDC
TopologyForward- Active Clamp
Forward- Synchronous

TI Devices (3)

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Part Number Name Product Family Sample & Buy Design Kits & Evaluation Modules
CSD18532Q5B  60V, N ch NexFET MOSFET™, single SON5x6, 3.2mOhm  MOSFETs  Sample & Buy View Design Kits & Evaluation Modules
UCC27511  4A/8A Single Channel High-speed Low-side Gate Driver  Gate drivers  Sample & Buy Not Available
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)
CSD18532Q5B VSON-CLIP (DNK)| 8 Download Download
UCC27511 Download Download
UCC2897A Download Download
Download Download

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Technical Documents

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User guides (1)
Title Type Size (KB) Date
PDF 2540 16 Oct 2014
Design files (6)
Title Type Size (KB) Date
ZIP 797 15 May 2018
ZIP 807 15 May 2018
PDF 162 15 May 2018
PDF 724 15 May 2018
PDF 103 15 May 2018
PDF 84 16 Oct 2014

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