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7.6.2. VCC undervoltage detection circuit
When the VCC voltage falls and becomes less than the low detection voltage, OUT1/2 becomes
"OFF"(High-Z state).Moreover, in order to prevent chattering, a filter (TVCC_uv:2.5ms (typ.)) is built in.
For a logic circuit, it is reset in the case of VCCRHL (3.07V (typ.)) or less. Moreover, in order to prevent
chattering, a filter (TVCC_por:13.0μs (typ.)) is built in.
Figure 7.6.2-1 VCC undervoltage detection and POR threshold characteristics
Note: Some of timing charts in this document may be omitted or simplified for explanatory purposes.
VCC
VCCHL=3.5V (typ.)
Motor drive
output
Note: Some of timing charts in this document may be omitted or simplified for explanatory purposes.
Note: Some of timing charts in this document may be omitted or simplified for explanatory purposes.
T<TVCC_uv
2.5ms (typ.)
ON-STATE
Figure 7.6.2-2 Timing chart of VCC undervoltage detection
Figure 7.6.2-3 POR timing chart of VCC undervoltage
T>TVCC_uv
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TB9051FTG
TVCC_uv2
OFF(High-z)
ON-STATE
Ver.1.1 2019-03-14
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