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L9963E 数据表(PDF) 134 Page - STMicroelectronics |
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L9963E 数据表(HTML) 134 Page - STMicroelectronics |
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134 / 184 page  Table 73. Recommended components for typical application scenario Components Value Unit Max. tolerance Rating Comments FRBAT 1 kΩ @100 MHz 1.4 A @ 125 °C Ferrite bead helps limiting the inrush current due to hotplug. It also filters high frequency noise. The BLM31KN102SH1L is recommended. It can be replaced with a 10 Ω RBAT resistor. Higher resistance values are not recommended since they introduce an error in VBAT measurement, proportional to RBAT*IVBAT. DZBAT 68 V The SMA6T68AY is recommended for protecting VBAT against damage during hotplug and ESD events. Connect to GND_ESD. CBAT_3 100 pF 10% 100 V Filter high frequency noise on VBAT sense line. Place as close as possible to VBAT pin. Connect to AGND. CBAT_2 33 nF 10% 100 V Filter high frequency noise on VBAT sense line. Place as close as possible to VBAT pin. Connect to AGND. CBAT_1 2.2 μF 10% 100 V Provide battery stabilization. Filter noise on VBAT sense line. Connect to GND_ESD. Do not exceed 2.2 μF. CVCOM 220 nF 10% 16 V Tank for the VCOM regulator. Mount as close as possible to VCOM pin. Total capacity on the VCOM pin must be equal to 2.2 µF. When isolated SPI communication is implemented via Transformer-Based Insulation, the recommended capacity partitioning is: • 1 µF as CESD_VCOM on the ISOH clamp. Connect to GND_ESD (refer to Section 6.8 ISO lines circuit) • 1 µF as CESD_VCOM on the ISOL clamp. Connect to GND_ESD (refer to Section 6.8 ISO lines circuit) • 220 nF as CVCOM directly on the VCOM pin. Connect to AGND CVCOM 2.2 μF 10% 16 V Tank for the VCOM regulator. Mount as close as possible to VCOM pin. This configuration is recommended when isolated SPI communication is implemented via Capacitive-Based Insulation. CVANA 2.2 µF 10% 6.3 V Tank for the VANA regulator. Connect to AGND. CVTREF 2.2 µF 10% 16 V Tank for the VTREF regulator. Connect to AGND. CBOOT 1 µF 10% 16 V Bootstrap capacitor. L9963E Typical application circuit and bill of material DS13636 - Rev 12 page 134/184 |
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