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PD168103 Datasheet(PDF) 9 Page - Renesas Technology Corp |
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PD168103 Datasheet(HTML) 9 Page - Renesas Technology Corp |
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9 / 22 page  Data Sheet S17332EJ1V0DS 7 µ PD168103 4. FUNCTIONAL DEPLOYMENT 4.1 Undervoltage Lockout (UVLO) Circuit This function is to forcibly stop the operation of the µ PD168103 to prevent malfunctioning if LVDD drops. When UVLO operates, the driver output and amplifier circuit are the OFF status. The UVLO circuit detects a voltage drop if LVDD drops to 1.7 V TYP. in the non-reset status (RESETB = H). In the reset status (RESETB = L), it detects a voltage drop if LVDD drops to 0.6 V TYP. This circuit may not operate if the LVDD voltage abruptly drops for just a few µs. 4.2 Overheat Protection (TSD) Circuit This function is to forcibly stop the operation of the driver output to protect it from destruction due to overheating if the chip temperature of the µ PD168103 rises. The overheat protection circuit operates when the chip temperature rises to 150 °C or more. When overheat is detected, the driver output is stopped. When RESETB = L (the reset status) or when UVLO is detected, the overheat protection circuit does not operate. 4.3 Power Up Sequence The µ PD168103 has a circuit that prevents current from flowing into the VM, VSHUTTER and VIRIS pins (from the next, these are written as the motor power supply pins) when LVDD = 0 V or AVDD = 0 V. Therefore, the current that flows into the motor power supply pins are cut off when LVDD = 0 V. Because the LVDD pin voltage, the AVDD pin voltage and the motor power supply pins voltage are monitored, a current of 1 µA TYP. flows into each one of the motor power supply pins when LVDD is applied. |
Número de pieza similar - PD168103_15 |
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Descripción similar - PD168103_15 |
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