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BD9275F Datasheet(PDF) 2 Page - Rohm |
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BD9275F Datasheet(HTML) 2 Page - Rohm |
2 / 5 page 2/4 REV. B ○Electric Characteristics(Ta=25℃、VCC=12V、STB=3.0V) Item SYMBOL LIMIT UNIT CONDITION MIN. TYP. MAX. ((WHOLE DEVICE)) Operating current Icc1 - 2.0 4.0 mA RT=100kΩ, FB=GND, IS=1.5V Stand-by current Icc2 - 0 20 μA VSTB=0V ((STAND BY CONTROL)) Stand-by voltage H VSTBH 2 - VCC V System ON Stand-by voltage L VSTBL -0.3 - 0.8 V System OFF STB PIN pull down resistor RSTB 180 375 750 kΩ VSTB=2V ((VCC UVLO BLOCK)) ) Operating voltage VCC_UVLO 7.2 7.5 7.8 V VCC=6V→8V sweep Hesteresis width ⊿UVLO_HYS 0.3 0.5 0.7 V VCC=8V→6V sweep ((OSC BLOCK) ) RT pin Voltage VRT 1.300 1.500 1.700 V RT=100kΩ SRT ON resistance RSRT - 75 150 Ω VSRT=0.1V ((PWM Dimming Block)) PWM_IN PIN voltage H VPWMIN_H 2.4 - 5 V VPWM_IN=0V⇒3.0V PWM_IN PIN voltage L VPWMIN_L -0.3 - 0.8 V VPWM_IN=3.0V⇒0V PWM_IN PIN pull down resistor R_PWMIN 1000 2000 4000 kΩ VPWM_I=5V ((FEED BACK BLOCK)) IS threshold voltage VIS 1.225 1.250 1.275 V VS threshold voltage VVS 1.200 1.250 1.300 V IS source current IIS 16 20 24 μA IS=1.0V IS COMP detect voltage VISCOMP 0.565 0.625 0.685 V IS=1.3V→0.5V ((SLOW START BLOCK)) SS term END Voltage VSS 2.400 2.500 2.600 V VSS=0V⇒3V Soft start current ISS 1.7 2.0 2.3 μA VSS=1.0V IS=1.5V ((COMP BLOCK)) COMP over voltage detect voltage VCOMPH 1.900 2.000 2.100 V VSS>2.5V VCOMP=1.5V→2.5V Hysterisis width (COMP) ⊿VCOMPH 0.100 0.200 0.300 V VSS<2.0V VCOMP=2.5V→1.5V COMP PIN pull down resistor RCOMP 1000 2000 4000 kΩ COMP=5V FAIL ON resistance RFAIL - 75 150 Ω VFAIL=0.1V ((OUTPUT BLOCK)) N1,N2 PIN output sink resistance RsinkN 1.5 3.0 6.0 Ω IIN=100mA N1,N2 PIN output source resistance RsourceN 4.5 9 18 Ω IIN=-100mA MAX DUTY MAX DUTY 45 47.0 49.5 % FOUT=50kHz Drive output frequency FOUT 48.25 50 51.75 kHz RT=100kΩ ((TIMER BLOCK)) Timer Latch setting voltage VCP 2.900 3.000 3.100 V VCP=0V⇒3.2V Timer Latch setting current ICP 1.7 2.0 2.3 μA CP=1.0V IS=1.5V COMP=3.0V (This product is not designed to be radiation-resistant.) |
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