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TB9051FTG
Figure 7.2-1 Example of DIAG output circuit configuration
Note: Some of the functional blocks and circuits in the block diagram may be omitted or simplified for
explanatory purposes.
In the case of the over-current detection and over-temperature detection, DIAG output is latched (*1) (the
motor drive output becomes an OFF operation).
The "L" output latch (*1) of the DIAG pin is cleared with the rising edge of EN pin or the falling edge of
ENB pin.
Moreover, for the VBAT and VCC voltage abnormality, they are returned automatically after returning
normal voltage.
In the automatic returning operation, the DIAG output returns the normal operation in the response to
the release voltage of each power supply monitoring function.
If the VCC voltage is dropping still in the abnormal state, "L" holding circuit holds the DIAG output = L.
DIAG="L"(*2) is latched when set to fail situation in initial diagnosis and diagnostic restart
operation. This latch (* 2) is cleared at VCC low voltage POR detection, EN Disable, or ENB Disable.
Ver.1.1 2019-03-14
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