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FS6407 Datasheet(PDF) 104 Page - NXP Semiconductors |
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FS6407 Datasheet(HTML) 104 Page - NXP Semiconductors |
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104 / 111 page  104 NXP Semiconductors FS6407/FS6408 9 Typical applications Figure 49. FS6407/FS6408 simplified application schematic with non-inverting buck-boost configuration Figure 50. VAUX/VCCA connection FB_CORE VCCA_E VCCA_B VCCA VAUX_E VAUX_B VAUX CAN-5V VSENSE COMP_CORE MOSI MISO SCLK NCS RXD TXD CANH CANL VDDIO SELECT MUX_OUT INTB RSTB FS0B DEBUG IO_0 IO_1 IO_2 IO_3 IO_4 IO_5 VCORE_SNS GND_COM VSUP3 Vbat 1 µH 5.1 k Ω 1µF 22 µH 1µF 2.2 µH R3 R4 C1 R1 R2 C2 4 MCU SPI VDDIO MCU RESET MCU CAN 5.1K Ω MCU Int. To Fail Safe circuitry 120 Ω RSelect SELECT pin Configuration for VCCA & VAUX (R select connected to GND) Vcca Vaux Rselect (K Ω) Recommended Value 3.3V 3.3V < 7 5.1KΩ +/-5% 5V 5V 10.8 <<13.2 12K Ω +/-5% 3.3V 5V 21.6 <<26.4 24K Ω +/-5% 5V 3.3V 45.9 <<56.1 51K Ω +/-5% Components selection for Vcore voltage (current range 10mA -> 800mA, DI/DT = 2A/µs) Vcore voltage R3(+/-1%) R4(+/-1%) R1(+/-5%) C1 R2(+/-5%) C2 Cout 1.23V 4.32K Ω 8.06K Ω 200Ω 220pF 39K Ω 1nF 2*10µF 3.3V 24.9K Ω 8.06K Ω 510 Ω 680pF 18K Ω 150pF 2*10µF MCU inputs Vcore Voltage Vcca (5V or 3.3V), available configurations Whithout Ext. PNP : 100mA capability +/-1% accuracy for 5V configuration, +/-1.5% accuracy for 3.3V configuration, With Ext. PNP : < 200mA +/-2% accuracy With Ext. PNP : 300mA capability +/-3% accuracy Vaux (5V or 3.3V) 300mA capability +/-3% accuracy MUX_OUT (output selected by SPI) Vsense or VIO_0 or VIO_1 or Internal 2.5V reference voltage (2.5V +/-1%) Connected to Vcca or Vcore (If connected to Vcore, must be connected closed to coutx 10µF x 2) VDDIO or VSUP3 5.1K Ω if connected to VDDIO >10K Ω if connected to Vsup3 5.1K Ω PGND PGND PGND PGND PGND GND GND GND PGND PGND PGND PGND PGND PGND GND GND GND GND GND GND GND PGND GND GND Ground Connections PGND ground plane connected to DGND pin GND ground plane connected to AGND and GND_COM pins PGND (DGND) and GND (AGND & GND_COM) connected together far from PGND ground plane. GND Vpre DEBUG mode GND GND GNDA GND DGND ESR cap. <100m Ω ESR cap. <10m Ω ESR cap. <10m Ω ESR cap. <100m Ω ESR cap. <100m Ω Vaux_PNP Vcca_PNP 11K Ω 5.1 k Ω FCCU monitoring from Freescale MCU Optional Optional Optional PGND EMI sup. Capacitor must be connected closed to load (220nF) and connected to GND EMI sup. Capacitor must be connected closed to load (100nF + 100pF) and connected to GND GND GND 1K Ω PGND 0R Vbat Optional Recommended connection for IOs not used in the application Example of IO connection and usage 5.1 k Ω 5.1 k Ω Capacitor must be close to Vaux pin Capacitor closed to Vcca pin Resistor must be close to Select pin Capacitors must be close to Vpre pin GND GND 10K Ω 330pF GND Key on Snubber values must be fine tuned as linked also to board layout performance Snubber values must be fine tuned as linked also to board layout performance R3 R4 To IO_1 Optional GND Optional From 2nd Vcore resistor bridge VCCA_E VCCA_B VCCA GND ESR cap. <100 m Ω Vcca_PNP Optional 33907L_08L VAUX_E VAUX_B VAUX ESR cap. <100 m Ω Vaux_PNP SELECT RSelect GND GND FS6407/FS6408 |
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