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BD9897FS Dataheets PDF



Part Number BD9897FS
Manufacturers Rohm
Logo Rohm
Description DC-AC Inverter Controller
Datasheet BD9897FS DatasheetBD9897FS Datasheet (PDF)

1/4 STRUCTURE NAME OF PRODUCT TYPE FUNCTION Silicon Monolithic Integrated Circuit DC-AC Inverter Control IC BD9897FS ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ 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 IC’s BURST mode controlled by PWM and.

  BD9897FS   BD9897FS


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1/4 STRUCTURE NAME OF PRODUCT TYPE FUNCTION Silicon Monolithic Integrated Circuit DC-AC Inverter Control IC BD9897FS ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ 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 IC’s BURST mode controlled by PWM and DC input Output liner Control by external DC voltage ○Absolute Maximum Ratings(Ta = 25℃) Parameter Supply Voltage BST pin SW pin BST-SW voltage difference Operating Temperature Range Storage Temperature Range Maximum Junction Temperature Power Dissipation * Symbol VCC BST SW BST-SW Topr Tstg Tjmax Pd Limits 36 40 36 7 -40~+85 -55~+150 +150 950* Unit V V V V ℃ ℃ ℃ mW Pd derate at 7.6mW/℃ for temperature above Ta = 25℃ (When mounted on a PCB 70.0mm×70.0mm×1.6mm) Operating condition Parameter Supply voltage BST voltage BST-SW voltage difference CT oscillation frequency BCT oscillation frequency Symbol VCC BST BST-SW fCT fBCT Limits 7.5~30.0 4.0~36.0 4.0~6.5 60~180 0.05~1.00 Unit V V V kHz kHz www.DataSheet4U.com 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 Characteristics(Ta=25℃,VCC=24V) Parameter ( (WHOLE DEVICE) ) Operating current Stand-by current ( (STAND BY CONTROL) ) Stand-by voltage H Stand-by voltage L ( (UVLO BLOCK) ) ) Operating voltage (VCC) Hesteresis width (VCC) Operating voltage (UVLO) Hesteresis width (UVLO) ( (REG BLOCK) ) REG output voltage REG source current ( (OSC BLOCK) ) Active edge setting current Negative edge setting current OSC Max voltage OSC Min voltage Soft start current SRT ON resistance ( (BOSC BLOCK) ) BOSC Max voltage BOSC Min voltage BOSC constant current BOSC frequency ( (FEED BACK BLOCK) ) IS threshold voltage 1 IS threshold voltage 2 VS threshold voltage IS source current 1 IS source current 2 VS source current IS COMP detect voltage ① IS COMP detect voltage ② VREF input voltage range ( (DUTY BLOCK) ) High voltage Low voltage DUTY-OUT sink resistance DUTY-OUT source resistance ( (OUTPUT BLOCK) ) LN output sink resistance LN output source resistance www.DataSheet4U.com HN output sink resistance HN output source resistance MAX DUTY OFF period Drive output frequency ( (TIMER LATCH BLOCK) ) Timer Latch setting voltage Timer Latch setting current ( (COMP CLOCK) ) COMP1 over voltage detect voltage COMP2 over voltage detect voltage COMP2 under voltage detect voltage ① COMP2 under voltage detect voltage ② ((Synchronous Block)) High voltage Low voltage CT_SYNC sink resistance CT_SYNC source resistance High voltage input range Low voltage input range Symbol MIN. - - 2.0 -0.3 5.7 0.26 2.179 0.074 5.68 20.0 1.35/(RT*7) Iact×29 1.8 0.35 0.6 - 1.94 0.40 1.35/BRT 291 1.225 - 1.220 - 32 - 0.90 - 0.6 2.8 - - - 0.75 2.5 1.25 2.5 46.0 100 58.5 1.94 0.40 2.460 2.460 1.225 0.606 2.8 - - - 2.0 -0.3 Limits TYP. 7.2 13.0 - - 6.0 0.35 2.25 0.098 5.80 - 1.5/(RT*6) Iact×35 2.0 0.45 1.1 100 2.00 0.50 1.5/RT 300 1.250 VREFIN 1.250 - 50 - 0.94 VREFIN×0.73 - 3.1 150 250 1.5 5 2.5 5 48.0 200 60.0 2.0 0.55 2.485 2.485 1.25 0.625 3.1 - 150 370 - - MAX. 13 30.0 VCC 0.8 6.3 0.43 2.321 0.122 5.92 - 1.65/(RT*5) Iact×41 2.2 0.60 1.6 200 2.06 0.60 1.65/RT 309 1.275 VIS① 1.280 0.9 68 0.9 0.98 - 1.6 3.4 0.5 300 500 3.0 10 5.0 10 49.5 400 61.5 2.06 0.70 2.510 2.510 1.275 0.644 3.4 0.5 300 740 3.3 0.6 Unit Conditions Icc1 Icc2 VstH VstL VuvloH ⊿VCC_Vuvlo Vuvlo2 ⊿Vuvlo VREG IREG Iact Ineg VOSCH VOSCL ISS RSRT VBCTH VBCTL IBCT fBCT VIS① VIS② VVS IIS1 IIS2 IVS VISCOMP① VISCOMP② VREFIN VDUTY-OUTH VDUTY-OUTL RDUTY-OUTSink RDUTY-OUTSouce RsinkLN RsourceLN RsinkHN RsourceLN MAX DUTY TOFF FOUT VCP ICP VCOMPH VCOMP2_H VCOMP_L_1 VCOMP_L_2 VCT_SYNCH VCT_SYNCL RCT_SYNC_SYNC RCT_SYNC_SOURCE VCT_SYNC_IN_H VCT_SINK_IN_L mA μA V V V V V V V mA A A V V μA Ω V V A Hz V V V μA μA μA V V V V V Ω Ω Ω Ω Ω Ω % ns kHz V μA V V V V V V Ω Ω V V CT_SYNC_IN = OPEN System ON System OFF VCC>7.0V fCT=120kHz fCT=120kHz fBCT=0.3kHz fBCT=0.3kHz VBCT=0.2V (BRT=33kΩ BCT=0.048μF) VREF applying voltage DUTY=2.2V DUTY=0V IS=0.5V VREFIN≧1.25V VREFIN<1.25V No effect at VREF>1.25V VBST-VSW=5.0V VBST-VSW=5.0V FOUT=60kHz (RT=4.7kΩ CT=235pF) VSS>2.2V VSS>2.2V VSS>2.2V VSS<2.2V (This product is not designed to be radiation-resistant.) REV. B 3/4 Package Dimensions Pin Description Device Mark PIN No. 1 2 PIN NAME PGND LN2 HN2 SW2 BST2 CT_SYNC_IN CT_SYNC_OUT SRT RT CT GND BCT BRT DUTY DUTY_OUT STB CP FAIL VREF VS IS FB SS COMP2 COMP1 VCC UVLO REG BST1 SW1 HN1 LN1 FUNCTION Ground for FET drivers NMOS FET driver NMOS FET driver Lower rail voltage for HN2 outp.


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