Introduction Fuji Smart power device M-POWER2 for Multi-oscillated current resonant type power supply Summary System: The ideal and Fuji s original system It includes many functions(soft-switching,stand-by). DeviceMultiple-chip PowerDevice M-POWER2 contains IC and two MOSFETs in SIP-13pin package. M-POWER has various types of protection functions. July.25.22
Features 1. High efficiency (a reduction in SMPS size is possible.) DC/DC : 92.3%(DC input:4v,output:16v) PFC+DC/DC :87.%(AC1V),89.5%(AC2V) 2. Built in stand-by mode (An auxiliary power supply is unnecessary.) P in <.4W at P out =.W P in <1.W at P out =.5W P in <4.W at P out =2.W 3. Low noise (a reduction in the noise suppression parts is possible.) MOSFETsTurn-on : ZVS+ZCS Turn-off : ZVS Diodes(secondary side) Surge voltage does not occur at reverse recovery. 4. Fail-safety (Built in protection functions:oc,sc,ov,tj(oh)) 5. Easy design power supply (Reduction of design time) Down size your SMPS July.25.22
Circuit configuration Multi-oscillated current resonant type power supply Self-oscillation circuit Cr rectification circuit or PFC Ed IQ2 VQ2 PWM IQ1 VG2 VQ1 VP1 Tr VD1,ID1 VD2,ID2 Vo VG1 V Normal / Stand-by signal Q1 ------ PWM oscillation Q2 ------ self-oscillation (driven by winding voltage). July.25.22
Operation of switching transient rectification circuit or PFC Ed PWM VQ2 VG1 Self-oscillation circuit IQ2 IQ1 V VG2 VQ1 Cr VP1 Tr VD1,ID1 VD2,ID2 Vo VP2VG2 VG1 Feedback voltage comparison voltage VG2 Vth(Q2) VP2 Dead time:td Feedback voltage VQ1,VQ2 VQ2 VQ1 Normal / Stand-by signal IQ1 IQ2 IQ1,IQ2 Features of the Multi-oscillation 1) No arm-short circuit. VP1VP3 VP3 VP1 2) it is high efficiency at light load too. ID1,ID2 ID1 ID2 July.25.22
Efficiency comparison PFM V.S. M-POWER2(Muiti oscillation) Vo=15V With PFC PFM M-POWER2 Efficiency[%] Output [W] It is high efficiency at light load too. July.25.22
Switching waveforms Ultra Low Noise MOSFETs(Q1,Q2) No surge voltage Condition:Ed=4V,Po=65W,Vo=16V Diodes(Secondary side) VQ2 Di No surge voltage VD1 ZVS ZVS+ZCS IQ2 D1 Sine wave-like current ID1 Rectangle wave-like voltage VQ1 VD2 ZVS ZVS+ZCS IQ1 D2 ID2 Turn-on : ZVS+ZCS Turn-off : ZVS No surge voltage at Turn-off No surge voltage at reverse recovery Reduction in the noise suppression parts is possible. July.25.22
Characteristic 1 High efficiency Efficiency (%) 9 8 DC/DC AC2V AC1V DC/DC : 92.3% (DC input:4v,output:16v) PFC+DC/DC:87.% (AC1V),89.5%(AC2V) 7 2 4 6 8 1 Output (W) Efficiency - Load characteristic at normal mode Down size your SMPS July.25.22
Performance Power saving operation Soft-start and soft-end switching of M-POWER2 M reduce transformer noise. VCS 2V/div VCS 2V/div IP1.8A/div IP1.8A/div 2ms/div 5s/div July.25.22
Characteristic 4. Power saving operation 3.5 Input:Pin [W] 3. 2.5 2. 1.5 P in <.4W at P out =.W P in <1.W at P out =.5W P in <4.W at P out =2.W 1..5...5 1. 1.5 2. 2.5 Output:Po [W] Input power output power characteristic at standby mode No sub power supply required for stand-by July.25.22
M-POWER2 Type name Main-MOSFET Sub-MOSFET Control IC V DS R DS(ON) V DS R DS(ON) V CC(ON) T j(oh) F9221L 5V.9 5V.9 16.5V F9222L 5V.6 5V.6 16.5V 125 15 M/P 125 15 2/9 External view of M-POWER2 PKG H:1.2mmW:31.mmT:3.5mm Unit:mm July.25.22
Vol.75 No.1 22 585
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