Data Sheet

TB67S279FTG, TB67S289FTG, TB67S249FTG Application Note
2018-03-07
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Preliminary
3. Power Supply Sequence
There are no special procedures between power sources in powering on and shutdown because
TB67S279FTG, TB67S289FTG, and TB67S249FTG can operate with a single power supply by the
VCC regulator. Moreover, built-in under voltage detections (UVLO and power on reset function
(POR)) avoid malfunction, which occurs at the UVLO/POR detection threshold or less. While POR is
activated, the internal logic is initialized. The UVLO/POR detection threshold is as follows; in
startup = 7.5 V±1.0 V, in shutdown = 7.0 V±1.0 V, and the hysteresis = 0.5 V (typ.).
Figure 3.1 Power supply voltage and operation range
Motor power supply voltage (VM)
7.5 V
6.5 V
8.5 V
7.0 V
6.0 V
8.0 V
VMPOR (H): 7.5 V ± 1.0 V
VMPOR (L): 7.0 V ± 1.0 V