High-Eff 2Stage Univ Input Pwr Supply Using Trans 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 PMP8920 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. In addition, synchronous rectifier (SR) IC UCC24610 is applied to LLC output rectifier stage. Low EMI is expected with zero voltage switching on TM-PFC and LLC-SRC switches. An overall 91% 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 PMP8920.1
Vin (Min) (V) 85
Vin (Max) (V) 265
Vout (Nom) (V) 12
Iout (Max) (A) 9
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

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SLUUAP2.PDF (1598 K)

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


Detailed schematic diagram for design layout and components


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

SLUC486.ZIP (352 K)

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


Includes TI products in the design and potential alternatives.


LM290130-V quad differential comparator

Data sheet: PDF | HTML
LLC controllers

UCC256008-pin high-performance resonant mode LLC controller

Data sheet: PDF | HTML
Linear & low-dropout (LDO) regulators

TPS71550-mA 24-V ultra-low-IQ low-dropout (LDO) voltage regulator

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
SR & load share controllers

UCC24610Secondary side synchronous rectifier controller

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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View all 3
Type Title Date
Technical article Power Tips: Get to know LLC series resonant converter design Sep. 23, 2014
Technical article Power Tips: How to Implement Synchronous Rectifiers in a Resonant LLC Half-Bridge Dec. 10, 2013
Test report PMP8920 Test Results Aug. 09, 2013

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