120VAC Input 14V/5A Active Clamp Forward


Design files


This reference design uses the UCC2897A active clamp controller to generate an isolated 14V output at 70W from a US line AC input. This design is over 90% efficient and fits in a 51mm X 66mm X 30mm (2.0” X 2.6” X 1.2”) volume.

Output voltage options PMP6661.1
Vin (Min) (V) 108
Vin (Max) (V) 132
Vout (Nom) (V) 14
Iout (Max) (A) 5
Output Power (W) 70
Isolated/Non-Isolated Isolated
Input Type AC
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.

SLUU627.PDF (1615 K)

Test results for the reference design, including efficiency graphs, test prerequisites and more

SLUR498.PDF (81 K)

Detailed schematic diagram for design layout and components

SLUR499.PDF (64 K)

Complete listing of design components, reference designators, and manufacturers/part numbers


Includes TI products in the design and potential alternatives.

PWM controllers

UCC2897A110-V active clamp current mode PWM controller with P-channel clamp FET and line OV protection

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Shunt voltage references

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Technical documentation

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Type Title Date
Test report PMP6661 Test Results Aug. 16, 2011

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