PD168103_15 Datasheet, PDF (9/22 Pages) Renesas Technology Corp – 5-CHANNEL OPERATIONAL AMPLIFIER, IRIS DRIVER, AND 4-CHANNEL H-BRIDGE DRIVER

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.
Data Sheet S17332EJ1V0DS
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