High Eff 2Stage Univ Input Power Supply-Transition Mode PFC LLC Resonant Conv Reference Design


Design files


Low EMI, high efficiency, high power factor and reliable power supply are main focus of the PMP8911 design for telecom applications. Transient mode (TM) power factor correction (PFC) with UCC28051 and LLC series resonant converter (SRC) with UCC25600 are applied in PMP8911. Low EMI is expected with zero voltage switching on TM-PFC and LLC-SRC switches. An overall 92% efficiency is achieved at 100W full load. In addition, several protections are embedded into this design which includes input under-voltage protection, input over-voltage protection, output over-voltage protection, and output hic-cup over-power protection.

Output voltage options PMP8911.1
Vin (Min) (V) 85
Vin (Max) (V) 265
Vout (Nom) (V) 54
Iout (Max) (A) 2
Output Power (W) 108
Isolated/Non-Isolated Isolated
Input Type AC
Topology Boost- PFC^Flyback- DCM^Half Bridge- Resonant
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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.

SLUUAH6.PDF (1819 K)

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

SLURA79.PDF (277 K)

Detailed schematic diagram for design layout and components

SLURA80.PDF (106 K)

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

SLUC459.ZIP (341 K)

Design file that contains information on physical board layer of design PCB


Includes TI products in the design and potential alternatives.


LM139Quad differential comparator, military grade

Data sheet: PDF | HTML

LM139-MILQuad Differential Comparator

Data sheet: PDF | HTML
LLC controllers

UCC256008-pin high-performance resonant mode LLC controller

Data sheet: PDF | HTML
PWM controllers

UCC2889Off-line power supply controller, -40C to 85C

Data sheet: PDF
Power factor correction (PFC) controllers

UCC28051Transition mode PFC controller with 12.5V/9.7V UVLO and IEC61000-3-2 compliance, -40°C to 105

Data sheet: PDF | HTML
Shunt voltage references

LM4040Fixed voltage, 45-µA, precision micropower shunt voltage reference

Data sheet: PDF | HTML
Shunt voltage references

LM4312%, 1%, or 0.5% accuracy, adjustable precision Zener shunt regulator

Data sheet: PDF | HTML
Temperature switches

TMP300Resistor-Programmable, up to 18V-Capable Temp Switch and Analog Out Sensor

Data sheet: PDF | HTML

Technical documentation

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Type Title Date
Technical article Power Tips: Get to know LLC series resonant converter design Sep. 23, 2014
Test report PMP8911 Test Results May 17, 2013

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