MCZ5209SN

Application Note


Overview/Features

MCZ5209SN is a LLC resonant controller with integrated CRM(Critical conduction mode / Transition mode / Boundary conduction mode) PFC controller and loss-less startup high voltage switch in one chip.
Active standby fucnction and burst mode operation improves light load efficiency.
600V withstandng high side direct gate driver and optimised protection assures robust compact resonant converter design by minimum component counts in high power applications like :

　■ LBP and OA equipment PSU
　■ AC adapters
　■ Flat panel TV/display PSU
　■ Industrial equipment PSU
　■ Audio amplifier PSU

1. Integrated PFC controller and LLC controller in SOP24(narrow) package
2. HV self-bias switch eliminates external startup resistor consumption or additional bias converter
3. Frequency / interval adjustable burst function
4. Active stdby function improves light load efficiency
5. Latched or non-latched protection selectable
6. TSD(Thermal shutdown) protects from heavy hazard of IC in abnormal condition
7. High IC supply withstanding (35V)

[ PFC ]
1. Critical conduction mode operation
2. Bottom skipping operation minimizes turn-on loss
3. Current sensing resistor loss is small by low sensing threshold voltage (0.5V)
4. Loop open protection / dynamic OVP

[ LLC ]
1. Highly reliable 600V gate driver
2. Stabilized gate drive VDD
3. Two mode OCP
    OCP1 : fast shutdown of gate pulse for load short condition
    OCP2 : slow frequency sweep protection for OLP
4. Capasitive mode protection
5. Brown Out protection
6. Safe startup function


Application Note Contents

1. General description
    1.1 Features
    1.2 Block diagram
    1.3 Pin assignment
    1.4 Pin description
2. Functional description
    2.1 introduction
        2.1.1 functional section
        2.1.1 IC operation mode
    2.2 Supply
        2.2.1 IC supplies (HV startup snd Vc2 dropper)
    2.3 PFC section
        2.3.1 Critical conduction mode PFC operation
        2.3.2 Zero current sensing : ZC (pin 3)
        2.3.3 PFC output voltage sensing : FBP (pin 5)
        2.3.4 PFC control phase compensation : COMP (pin 4)
        2.3.5 PFC Gate driver :VGP (pin 1)
        2.3.6 PFC protection
    2.4 LLC section
        2.4.1 Osillator and Feed Back : FBL (pin 12)
        2.4.2 LLC Gate driver : VGH,VGL (pin 22,16)
        2.4.3 LLC protection
    2.5 Common section
        2.5.1 AC input line sensing : LS (pin 7)
        2.5.2 Active standby and Burst mode
        2.5.3 Thermal shutdown
3. Selecting component value
    3.1 PFC section
    3.2 LLC section
    3.3 Common part
4. Application example
    4.1 example circuit
5. Mechanical dimension
    5.1 SOP24 (MCZ5209SN)

Example Circuits


Terms and Conditions for Licensing of Application Note

Upon downloading Application Note, you will be considered as having given your consent to the content of this Agreement.
Before downloading Application Note from our website, please read thoroughly the content of the sections below, including the disclaimer, and only download Application Note by clicking the "I AGREE" button upon your agreement with the content of this Agreement. 
  1. Only those individual Customers who have agreed to this Agreement and downloaded Application Note may use Application Note under non-exclusive and non-assignable licensing terms.
    With respect to the Application Note which you downloaded, you may not sell it or lend it, or lease it out to someone else, or otherwise use it for profit, and you may not distribute, transmit (including public transmission), or otherwise provide it to someone else.
  2. The reference power supplies described in the Application Note which you downloaded (hereinafter referred to as "Licensed Application Note") are for understanding the performance of our products, and do not guarantee output, temperature, and any other characteristics, nor do they guarantee characteristics or safety specified by public agencies.
  3. Company has the copyright for the Licensed Application Note.
  4. You may not alter or adapt the entirety or any part of the Licensed Application Note, or take any other action which fails to maintain the identity of the Licensed Application Note.
  5. Use of the Licensed Application Note does not provide guarantee for, or grant license for, intellectual property rights and other rights of Company or any third party.
  6. Company does not provide any guarantee (including with regard to functional operation, merchantability, fitness for a particular purpose, accuracy of information, and guarantee of non-infringement of a third party's rights), expressly or impliedly, for the Licensed Application Note.
  7. Company is not responsible for any damage arising from the Licensed Application Note (including indirect damages, consequential damages, special damages, incidental damages, lost profits, opportunity loss, and damages due to taking leave of absence from work).
  8. The Licensed Application Note is subject to change without notice due to product improvement and the like.
  9. You shall strictly abide by applicable export control laws including the foreign exchange and foreign trade laws of each country.
  10. This Agreement takes effect upon your downloading of the Licensed Application Note.
    Company may, irrespective of the reason, terminate this Agreement at any time by posting a notice to that effect on our website.
  11. This Agreement shall be governed by the laws of Japan.

Back to Top