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FAN2306MAMPX 데이터시트(PDF) 6 Page - ON Semiconductor |
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FAN2306MAMPX 데이터시트(HTML) 6 Page - ON Semiconductor |
6 / 22 page © 2015 Fairchild Semiconductor Corporation www.fairchildsemi.com FAN2306A / FAN2306MA • Rev. 1.0 5 Thermal Characteristics The thermal characteristics were evaluated on a 4-layer pcb structure (1 oz/1 oz/1 oz/1 oz) measuring 7 cm x 7 cm). Symbol Parameter Typ. Unit JA Thermal Resistance, Junction-to-Ambient 35 °C/W ψJC Thermal Characterization Parameter, Junction-to-Top of Case 2.7 °C/W ψJPCB Thermal Characterization Parameter, Junction-to-PCB 2.3 °C/W Electrical Characteristics Unless otherwise noted; VIN=12 V, VOUT=1.2 V, TA = TJ = -40 to +125°C. (1) Symbol Parameter Condition Min. Typ. Max. Unit Supply Current IVCC,SD Shutdown Current EN=0 V 10 µA IVCC,Q Quiescent Current EN=5 V, Not Switching 1.8 mA IVCC,GateCharge Gate Charge Current EN=5 V, fSW=500 kHz 10 mA Reference, Feedback Comparator VFB FB Voltage Trip Point 590 596 602 mV IFB FB Pin Bias Current -100 0 100 nA Modulator tON On-Time Accuracy RFREQ=56.2 kΩ, VIN=10 V, tON=250 ns, No Load -20 20 % tOFF,MIN Minimum SW Off-Time 320 374 ns DMIN Minimum Duty Cycle FB=1 V 0 % fMINF Minimum Frequency Clamp FAN2306A Only 18.2 25.4 32.7 kHz Soft-Start ISS Soft-Start Current SS=0 V 7 10 13 µA tON,SSMOD SS On-Time Modulation SS<0.6 V 25 100 % VSSCLAMP,NOM Nominal Soft-Start Voltage Clamp VFB=0.6 V 400 mV VSSCLAMP,OVL Soft-Start Voltage Clamp in Overload Condition VFB=0.3 V, OC Condition 40 mV PFM Zero-Crossing Detection Comparator VOFF ZCD Offset Voltage TA=TJ=25°C -6 0 mV Current Limit ILIM Valley Current Limit Accuracy TA=TJ=25°C, IVALLEY =7 A -10 10 % KILIM ILIM Set-Point Scale Factor FAN2306A 233 ILIMTC Temperature Coefficient 4000 ppm/°C Enable VTH+ Rising Threshold 2.0 V VTH- Falling Threshold 0.8 V IENLK Enable Pin Leakage VEN=1.2 V 100 nA IENLK Enable Pin Leakage VEN=5 V 76 µA UVLO VON VCC Good Threshold Rising 4.4 V VHYS Hysteresis Voltage 160 mV Continued on the following page… |
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