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8V-36V Input 12V/7A; Active Clamp Forward Reference Design
PMP5123
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Description

This reference design generates an isolated 12V/7A output from an 8V to 36V DC input.  The UCC2897A controls an active clamp forward converter power stage.  The low gate charge and low RDSon of the CSD19533Q5A and CSD19534Q5A allow this design to achieve a max load efficiency over 93%, with a peak efficiency of over 94%.  The compact UCC27511 drivers simplify the gate drive circuitry for the synchronous rectifiers.

Features
  • High Efficiency (over 94% peak)
  • Low profile, less than 0.5 inches (12.5mm) max component height
  • Self-driven synchronous rectifiers reduce drive complexity

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Schematic/Block Diagram

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Test Data

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Design Files

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Parametrics
 PMP5123.1
(Output Voltage 1)
Vin (Min) (V)8
Vin (Max) (V)36
Vout (Nom) (V)12
Iout (Max) (A)7
Output Power (W)84
Isolated/Non-IsolatedIsolated
Input TypeDC
TopologyForward- Active Clamp
Forward- Synchronous

TI Devices (4)

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Part Number Name Product Family Sample & Buy Design Kits & Evaluation Modules
CSD19533Q5A  100V, N ch NexFET MOSFET™, single SON5x6, 9.5mOhm  MOSFETs  Sample & Buy Not Available
CSD19534Q5A  100V, N ch NexFET MOSFET™, single SON5x6, 15.1mOhm  MOSFETs  Sample & Buy Not Available
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)
CSD19533Q5A VSONP (DQJ)| 8 Download
CSD19534Q5A VSONP (DQJ)| 8 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 2755 03 Jun 2015
Design files (4)
Title Type Size (KB) Date
PDF 431 03 Jun 2015
PDF 84 03 Jun 2015
PDF 81 03 Jun 2015
PDF 179 03 Jun 2015

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