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TPS92310: Efficiency and Power Factor about TPS92310

Jason Chien42
Expert 1180 points
Part Number: TPS92310

Dear Sir:

               We found a reference design PMP6013 for AC-DC LED driver. It almost meet our requirement besides efficiency(84%) and power factor(94%) , but ,Our customer request PE>85% & PF>95% @120V ,  Does TPS92310 can meet this request or TI had another components more suitable for this kind of application? Below is detailed spec , Would you kindly give us some suggest? Thanks.

1. AC TRIAC dimmable

2. VF=33~34V, output current =320 mA .

3. Isolated Flyback -PFC

4.input AC voltage 90~130V

5.PE>85% & PF>95% @120V , 

Best Regard

Jason

  • 0
    TI__Mastermind 28655 points

    Hello Jason,

    The efficiency and power factor may make it to your requirement just from the difference in the output power and LED stack voltage provided EMI is still acceptable, EMI may go up a little due to the higher power.  The efficiency will be a bit higher because of the ratio of D2 forward conduction loss to the output voltage.  You can also lower R2 value a little which will help efficiency but hurt the power factor some, maybe 33 ohms (it needs to be pulse rated).  If you disconnect R11 after the circuit powers up it will help the efficiency as well since the TPS92310 will be running from the bias voltage.  The power factor improvement would need to be reducing the line to line capacitance including the damper capacitor (C4, C1, C5 and C3).  These things may affect the compatibility with some triac dimmers and EMI, it's a balancing act.  I'm not sure where the 95% power factor requirement comes from, generally it's 70% or 90% to meet certain regulatory requirements.

    Regards,