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7.9. Regeneration operation
At the time of VBAT voltage detection operation, VCC high voltage detection operation, VCC voltage
detection operation, TSD detection operation, and over-current detection operation, before a High-Z
output, regeneration operation that sends a coil current for outputs (OUT1, OUT2) to VBAT and a GND
pin are put into effect to suppress the reverse electromotive current.
Regeneration operation has two kinds of operation, those are low side regeneration operation (OUT1 Nch
ON, OUT2 Nch ON) and high side regeneration operation (OUT1 Pch ON, OUT2 Pch ON).
High side regeneration operation (OUT1 Pch ON, OUT2 Pch ON) is done regeneration operation at the
time of OUT1/OUT2 short to the power supply. At the time of other detection operations, it becomes low
side regeneration operation (OUT1 Nch ON, OUT2 Nch ON).
Note: When the VCC voltage falls and the VCC undervoltage POR detection is detected, the regeneration
is not operated and an output is set to the High-Z state.
Note: When Pch over-current detection and Nch over-current detection occur, OUT1 and OUT2 output
are all in "OFF" state.
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TB9051FTG
Ver.1.1 2019-03-14
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