TPS1H100-Q1
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ZHCSDD8D –OCTOBER 2014–REVISED DECEMBER 2019
In addition, during the output-off period, the diagnostic disable function lowers the current consumption for the
standby condition. The three working modes in the device are normal mode, standby mode, and standby mode
with diagnostic. If off-state power saving is required in the system, the standby current is <500 nA with DIAG_EN
low. If the off-state diagnostic is required in the system, the typical standby current is around 1 mA with
DIAG_EN high.
7.4 Device Functional Modes
7.4.1 Working Mode
The three working modes in the device are normal mode, standby mode, and standby mode with diagnostic. If an
off-state power saving is required in the system, the standby current is less than 500 nA with DIAG_EN low. If an
off-state diagnostic is required in the system, the typical standby current is around 1 mA with DIAG_EN high.
Note that to enter standby mode requires IN low and t > toff,deg. toff,deg is the standby-mode deglitch time, which is
used to avoid false triggering. Figure 44 shows a work-mode state-machine state diagram.
Standby Mode
(IN low, DIAG low)
DIAG_EN low and
IN high to low and
t > toff,deg
DIAG_EN
high to low
IN low to high
DIAG_EN
low to high
IN high to low and
DIAG_EN high and
t > toff,deg
Standby mode
with diagnostic
(IN low, DIAG high)
Normal Mode
(IN high)
IN low to high
Figure 44. Work-Mode State Machine
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