BD9897FS-E2 ROHM

1/4 STRUCTURE Silicon Monolithic Integrated Circuit NAME OF PRODUCT DC-AC Inverter Control IC TYPE FUNCTION 36V High voltage process 1ch control with Full-Bridge Lamp current and voltage sense feed back control Sequencing easily achieved with Soft Start Control Short circuit protection with Timer Latch Under Voltage Lock Out Mode-selectable the operating or stand-by mode by stand-by pin Synchronous operating the other BD9897FS ICs BURST mode controlled by PWM and DC input Output liner Control by external DC voltage Absolute Maximum RatingsTa = 25 Parameter Symbol Limits Unit VCC 36 V Supply Voltage BST 40 V BST pin SW 36 V SW pin BST-SW voltage difference BST-SW 7 V Topr -40+85 Operating Temperature Range Tstg -55+150 Storage Temperature Range Tjmax +150 Maximum Junction Temperature Pd 950* mW Power Dissipation * Pd derate at 7.6mW/ for temperature above Ta = 25 (When mounted on a PCB 70.0mm70.0mm1.6mm) Operating condition Parameter Symbol Limits Unit VCC 7.530.0 V Supply voltage BST 4.036.0 V BST voltage BST-SW voltage difference BST-SW 4.06.5 V CT oscillation frequency fCT 60180 kHz BCT oscillation frequency fBCT 0.051.00 kHz Status of this document The Japanese version of this document is the official specification. Please use the translation version of this document as a reference to expedite understanding of the official version. If these are any uncertainty in translation version of this document, official version takes priority. REV. B 2/4 Electric CharacteristicsTa=25VCC=24V Parameter Limits Symbol Unit Conditions MIN. TYP. MAX. WHOLE DEVICE Operating current Icc1 7.2 13 mA CT SYNC IN = OPEN Stand-by current Icc2 13.0 30.0 A STAND BY CONTROL Stand-by voltage H VstH 2.0 VCC V System Stand-by voltage L VstL -0.3 0.8 V System UVLO BLOCK Operating voltage (VCC) VuvloH 5.7 6.0 6.3 V Hesteresis width (VCC) VCC Vuvlo 0.26 0.35 0.43 V Operating voltage (UVLO) Vuvlo2 2.179 2.25 2.321 V Hesteresis width (UVLO) Vuvlo 0.074 0.098 0.122 V REG BLOCK REG output voltage VREG 5.68 5.80 5.92 V VCC>7.0V REG source current IREG 20.0 mA OSC BLOCK Active edge setting current Iact 1.35/(RT*7) 1.5/(RT*6) 1.65/(RT*5) A Negative edge setting current Ineg Iact29 Iact35 Iact41 A OSC Max voltage VOSCH 1.8 2.0 2.2 V fCT=120kHz VOSCL 0.35 0.45 0.60 V fCT=120kHz OSC Min voltage Soft start current ISS 0.6 1.1 1.6 A SRT ON resistance RSRT 100 200 BOSC BLOCK VBCTH 1.94 2.00 2.06 V fBCT=0.3kHz BOSC Max voltage VBCTL 0.40 0.50 0.60 V fBCT=0.3kHz BOSC Min voltage BOSC constant current IBCT 1.35/BRT 1.5/RT 1.65/RT A VBCT=0.2V fBCT 291 300 309 Hz (BRT=33k BCT=0.048F) BOSC frequency FEED BACK BLOCK VIS 1.225 1.250 1.275 V IS threshold voltage 1 VIS VREFIN VIS V VREF applying voltage IS threshold voltage 2 VVS 1.220 1.250 1.280 V VS threshold voltage IS source current 1 IIS1 0.9 A DUTY=2.2V IS source current 2 IIS2 32 50 68 A DUTY=0V IS=0.5V VS source current IVS 0.9 A IS COMP detect voltage VISCOMP 0.90 0.94 0.98 V VREFIN1.25V IS COMP detect voltage VISCOMP VREFIN0.73 V VREFIN1.25V VREF input voltage range VREFIN 0.6 1.6 V No effect at VREF1.25V DUTY BLOCK High voltage VDUTY-OUTH 2.8 3.1 3.4 V Low voltage VDUTY-OUTL - 0.5 V DUTY-OUT sink resistance RDUTY-OUTSink 150 300 DUTY-OUT source resistance RDUTY-OUTSouce 250 500 OUTPUT BLOCK LN output sink resistance RsinkLN 0.75 1.5 3.0 LN output source resistance RsourceLN 2.5 5 10 HN output sink resistance RsinkHN 1.25 2.5 5.0 VBST-VSW=5.0V HN output source resistance RsourceLN 2.5 5 10 VBST-VSW=5.0V MAX DUTY MAX DUTY 46.0 48.0 49.5 % FOUT=60kHz OFF period TOFF 100 200 400 ns Drive output frequency FOUT 58.5 60.0 61.5 kHz (RT=4.7k CT=235pF) TIMER LATCH BLOCK Timer Latch setting voltage VCP 1.94 2.0 2.06 V Timer Latch setting current ICP 0.40 0.55 0.70 A COMP CLOCK COMP1 over voltage detect voltage VCOMPH 2.460 2.485 2.510 V VSS2.2V COMP2 over voltage detect voltage VCOMP2 H 2.460 2.485 2.510 V VSS2.2V COMP2 under voltage detect voltage VCOMP L 1 1.225 1.25 1.275 V VSS2.2V COMP2 under voltage detect voltage VCOMP L 2 0.606 0.625 0.644 V VSS2.2V ((Synchronous Block)) High voltage VCT SYNCH 2.8 3.1 3.4 V Low voltage VCT SYNCL 0.5 V CT SYNC sink resistance RCT SYNC SYNC 150 300 CT SYNC source resistance RCT SYNC SOURCE 370 740 High voltage input range VCT SYNC IN H 2.0 3.3 V Low voltage input range VCT SINK IN L -0.3 0.6 V This product is not designed to be radiation-resistant. REV. B