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BM0853 Datasheet(PDF) 4 Page - Bookly Micro electronic |
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BM0853 Datasheet(HTML) 4 Page - Bookly Micro electronic |
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4 / 11 page ![]() 2015/08/10 Ver.1 Page 4 BM0853 Green-Mode PWM Controller ELECTRICAL CHARACTERISTICS (TA=25 , V ℃ CC=15V, unless otherwise specified.) Symbol Parameter Conditions Min. Typ. Max. Unit Supply Voltage ( Vcc Pin ) Istt Startup Current 10 20 uA VCOMP = 0V 2.7 4 mA VCOMP = 3V 2.4 mA Iop Operating Current Protection tripped (OLP, OVP) 1.0 mA UVLO (off) Min. Operating Voltage 9.0 10.0 11.0 V UVLO (on ) Start Threshold Voltage 15.0 16.0 17.0 V OVP Level Over Voltage Protection 24 26 29.5 V Voltage Feedback ( Comp Pin ) Isc Short Circuit Current 1.25 2.2 mA Vop Open Loop Voltage 6 V VTH(GM) Green Mode Threshold VCOMP 2.35 V Oscillator ( RT Pin ) FOSC Frequency RT=100KΩ 60.0 68.0 75.0 KHz FOSC(GM) Green Mode Frequency Fs=65.0KHz 22 KHz Fdt Frequency Variation versus Temp. Deviation (-40°C ~105°C) 3 % Fdv Frequency Variation versus VCC Deviation (VCC=11V-25V) 1 % Current Sensing ( CS Pin ) Vcs(off) Maximum Input Voltage 0.8 0.85 0.9 V TLEDD Leading Edge Blanking Time 280 nS Zcs Input impedance 1 MΩ TPD Delay to Output 100 nS Gate Driver Output ( OUT Pin ) DC (Max) Maximum Duty Cycle 70 75 80 % DC (Min) Minimum Duty Cycle 0 % VOL Output Low Level VCC=15V, Io=20mA 1 V VOH Output High Level VCC=15V, Io=20mA 8 V Tr Rising Time Load Cap=1000pF 50 200 nS Tf Falling Time Load Cap=1000pF 30 120 nS OLP ( Over Load Protection ) TLOLP OLP Trip Level 5.0 V TDOLP OLP Delay Time (note) 60 mS Note: The OLP delay time is proportional to the period of switching cycle. So that, the lower RT value will set the higher switching frequency and the shorter OLP delay time. BM SEMI |
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