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VB409
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HIGH VOLTAGE REGULATOR POWER I.C.
VB409 ,HIGH VOLTAGE REGULATOR POWER I.C.ELECTRICAL CHARACTERISTICS (C=100μF; -25ºCVB921ZV ,HIGH VOLTAGE IGNITION COIL DRIVER POWER ICVB921ZVFI® / VB921ZVSPHIGH VOLTAGE IGNITION COIL DRIVERPOWER I.C.TYPE V I Vcl cl cg(sat)VB921ZVFI34 .. VB921ZVFI ,HIGH VOLTAGE IGNITION COIL DRIVER POWER ICBLOCK DIAGRAMHVcCONTROLVINUNITRSENSEND8012GNDOctober 2000 1/71VB921ZVFI / VB921ZVSPABSOLUTE MAXIMUM .. VB921ZVFI ,HIGH VOLTAGE IGNITION COIL DRIVER POWER ICVB921ZVFI® / VB921ZVSPHIGH VOLTAGE IGNITION COIL DRIVERPOWER I.C.TYPE V I Vcl cl cg(sat)VB921ZVFI34 .. VB921ZVSP ,HIGH VOLTAGE IGNITION COIL DRIVER POWER ICVB921ZVFI® / VB921ZVSPHIGH VOLTAGE IGNITION COIL DRIVERPOWER I.C.TYPE V I Vcl cl cg(sat)VB921ZVFI34 .. VBUS053AZ-HAF-GS08 , USB-OTG BUS-Port ESD-Protection for VBUS = 12 V W254BX ,Clocks and Buffers : Motherboard ClocksBlock DiagramPin ConfigurationVDD_REF PLL Ref FreqX1XTALREFOSCX2REFVDD_REF 1 48DividerPLL 1X1 .. W255H ,Clocks and Buffers : Motherboard ClocksW255200-MHz 24-Output Buffer for 4 DDRor 3 SDRAM DIMMS W255HT ,200-MPz 24-Output Buffer for 4DDR or 3 SDRAM DIMMSFunctional Description• One input to 24-output buffer/driver The W255 is a 3.3V/2.5V buffer designe .. W256 ,12 Output Buffer for 2 DDR and 3 SRAM DIMMSFunctional Description• One input to 12 output buffer/drivers The W256 is a 3.3V/2.5V buffer design .. W256H ,12 Output Buffer for 2 DDR and 3 SRAM DIMMSFunctional Description• One input to 12 output buffer/drivers The W256 is a 3.3V/2.5V buffer design .. W256HT ,12 Output Buffer for 2 DDR and 3 SRAM DIMMSFunctional Description• One input to 12 output buffer/drivers The W256 is a 3.3V/2.5V buffer design ..
VB409 HIGH VOLTAGE REGULATOR POWER I.C. VB409 DOUBLE OUTPUT HIGH VOLTAGE REGULATOR POWER I.C. BLOCK DIAGRAM
Figure 3: Electrical schematic used for EMC testing
APPLICATION EXAMPLE FOR THE POWER DISSIPATION OPTIMIZATION In case of IOUT2=constant the average power dissipated on the device (Pdevice) can be calculated as follow: device= PIN - (I OUT2 . V OUT2 ) - (I OUT1 . V OUT1 ) (1) where PIN = average input power and V OUT2 = average OUTPUT2 voltage Assuming that Itot= IOUT1 + IOUT2 (2) it is possible to use the below table data to evaluate through the formula (1) the minimum average power dissipation on the device. Table 1 (with R1=1MΩ) APPLICATION EXAMPLE: Assuming that: C=100μF; IOUT1=15mA and IOUT2=10mA, according to the formula (2), then Itot=25mA With these values, the Table 1 reports:R1=R2=1MΩ; VOUT2=13.7V. Using formula (1) the minimum average power dissipation is: Pdevice = 0.8 - (10 · 13.7) · 10-3 - (15 · 5) · 10-3 ≅ 0.6W
