48V Input 3.3V/30A with Output Pre-bias

(ACTIVE) PMP5997

Description & Features

Technical Documents

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Description

This reference design generates a 3.3V/100W output from a standard 48V telecom input and allows for a pre-biased output. The UCC2897A controls operation of the active clamp power stage. The drive signal for the synchronous rectifiers is sent to the secondary side through an ISO7220 digital isolator. This drive signal is blanked out during startup to allow for a pre-biased output. This design achieves efficiencies over 92% and is built on a standard ¼ brick footprint.

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


  




Bill of Materials (BOM)

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Parametrics
 PMP5997.1
(Output Voltage 1)
Vin (Min) (V)36
Vin (Max) (V)72
Vout (Nom) (V)3.3
Iout (Max) (A)30
Output Power (W)99
Isolated/Non-IsolatedIsolated
Input TypeDC
TopologyForward- Active Clamp
Forward- Synchronous

TI Devices (5)

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Part Number Name Product Family Sample & Buy Design Kits & Evaluation Modules
ISO7220M  Dual Channel, 2/0, 150Mbps Digital Isolator  Isolation  Sample & Buy View Design Kits & Evaluation Modules
TL331  Single Differential Comparator  Amplifiers  Sample & Buy Not Available
TL331-EP  Enhanced Product Single Differential Comparator  Amplifiers  Sample & Buy Not Available
TPS28225  8-Pin High Frequency 4-Amp Sink Synchronous MOSFET 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)
ISO7220M Download Download
TL331 Download Download
TL331-EP Download
TPS28225 Download Download
Download Download
UCC2897A Download 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 2860 16 Aug 2011 7
Design files (2)
Title Abstract Type Size (KB) Date Views
PDF 64 04 Aug 2011 5
PDF 131 04 Aug 2011 17

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