This reference design replaces the now obsolete PMP7376 52-V to 60-Vdc input, 12-V/22-A active clamp forward reference design.
PMP9656
48V-60VDC Input, 12V/250W Active Clamp Forward Reference Design
PMP9656
Overview
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
| Output voltage options | PMP9656.1 |
|---|---|
| Vin (Min) (V) | 48 |
| Vin (Max) (V) | 60 |
| Vout (Nom) (V) | 12 |
| Iout (Max) (A) | 21 |
| Output Power (W) | 252 |
| Isolated/Non-Isolated | Isolated |
| Input Type | DC |
| Topology | Forward- Active Clamp^Forward- Synchronous |
A fully assembled board has been developed for testing and performance validation only, and is not available for sale.
Design files & products
Design files
Download ready-to-use system files to speed your design process.
TIDU605.PDF (2608 K)
Test results for the reference design, including efficiency graphs, test prerequisites and more
TIDRBD0A.PDF (162 K)
Detailed schematic diagram for design layout and components
TIDRBD1.PDF (84 K)
Complete listing of design components, reference designators, and manufacturers/part numbers
TIDRBD2A.PDF (103 K)
Detailed overview of design layout for component placement
TIDRWD5.ZIP (807 K)
Files used for 3D models or 2D drawings of IC components
TIDCEP0.ZIP (797 K)
Design file that contains information on physical board layer of design PCB
TIDRBD3A.PDF (724 K)
PCB layer plot file used for generating PCB design layout
Products
Includes TI products in the design and potential alternatives.
MOSFETs
CSD18532Q5B — 60-V, N channel NexFET™ power MOSFET, single SON 5 mm x 6 mm, 3.2 mOhm
Data sheet: PDF | HTMLTechnical documentation
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| Type | Title | Date | ||
|---|---|---|---|---|
| * | Test report | PMP9656 Test Results | Oct. 16, 2014 |
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