36V-75Vdc Input, 5V/50W 1/8 Brick Active Clamp Forward Reference Design
PMP9108
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Description

This reference design generates a 5V/10A output from a standard telecom 48V DC input. The UCC2897A controls an active clamp forward converter power stage. The low gate charge and low RDSon of the CSD17309Q3 and CSD18540Q5B, implemented as self-driven synchronous rectifiers, allow this design to achieve a max load efficiency over 93%.  This design uses only ceramic output capacitors for high reliability and uses 100% surface mount components.  The board is laid out on a standard eighth brick footprint.

Features
  • Industry standard 1/8 Brick Footprint, 0.9" x 2.3" (23mm x 58mm)
  • High efficiency (greater than 93%)
  • All ceramic output capacitors
  • Self-driven synchronous rectifiers reduce drive complexity
  • 100% surface mount components
  • Low profile - 0.35" (9mm) maximum top side component height

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Schematic/Block Diagram

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Design Files

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Parametrics
 PMP9108.1
(Output Voltage 1)
Vin (Min) (V)36
Vin (Max) (V)75
Vout (Nom) (V)5
Iout (Max) (A)10
Output Power (W)50
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
CSD17309Q3  30V, N ch NexFET MOSFET™, single SON3x3, 6.3mOhm  MOSFETs  Sample & Buy View Design Kits & Evaluation Modules
CSD18540Q5B  60V, N ch NexFET MOSFET™, single SON5x6, 2.2mOhm  MOSFETs  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)
CSD17309Q3 VSON-CLIP (DQG)| 8 Download Download
CSD18540Q5B VSON-CLIP (DNK)| 8 Download Download
UCC2897A Download Download
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Technical Documents

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User guides (1)
Title Type Size (KB) Date
PDF 3971 10 Sep 2014
Design files (5)
Title Type Size (KB) Date
ZIP 557 10 Sep 2014
PDF 1036 10 Sep 2014
PDF 148 10 Sep 2014
PDF 83 10 Sep 2014
PDF 135 10 Sep 2014
Related Tools & Software

Software (1)



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