MCZ5209SN

应用手册


概述/特点

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


应用手册目录

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)

电路示例


应用手册免责声明

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