TPS68401 Datasheet, PDF (16/37 Pages) Texas Instruments – MULTIFUNCTION 3-CHANNEL LED DRIVERS

TPS68401, TPS68402
SLVSA68A – MARCH 2010 – REVISED JANUARY 2011
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POWER SAVE
In POWER SAVE mode analog blocks are disabled to minimize power consumption. See the Power Save Mode
section for further information.
MODE TRANSITIONS
Setting the CHIP_EN bit of the ENABLE register to 0 resets the program counters (PC) but does not change the
LED controller operational mode (see NORMAL MODE settings). Pulling the EN pin low resets the CHIP_EN bit
and PC but does not affect operational mode (see NORMAL MODE settings).
POWER OFF
RESET = 0xFFh or
nPUC=0
nPUC=0
RESET
nPUC=1 and EN pin = Low
nPUC=1 and
EN pin = High
SHUTDOWN
EN pin = Low
STANDBY
EN pin = High
CHIP_EN bit = 0
CHIP_EN bit = 1
STARTUP
TSD=0
TSD=1
TSD=1
TSD RECOVERY
NORMAL
TSD=0
TSD=1
Disable
Power Save
Enable
Power Save
POWER SAVE
Figure 8. Device Startup Flow and Modes of Operation
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