Texas Instruments TPS65810 Evaluation Module TPS65810EVM TPS65810EVM Datenbogen
Produktcode
TPS65810EVM
www.ti.com
SYSTEM SEQUENCING AND TPS65810 OPERATING MODES
SLEEP STATE
ONLY RTC _LDO IS ON
POWER PATH ACTIVE
RESPWRON = 0
REGISTER CONTENTS NOT RESET
INTERRUPT CLEARED
OFF
PROCESSOR
STANDBY STATE
RESPWRON = HI
PG FOR SM1&SM2
is masked
ENABLE STATE
SEQUENCE STATE
START INTEGRATED
SUPPLY START - UP SEQUENCE
RESPWRON = LO
POWER GOOD
CHECK STATE
CHECK STATE
RESPWRON=HI
ENABLE POWER GOOD COMPARATORS
INT PIN MODE SET BY INTERRUPT
CONTROLLER
NORMAL MODE
RESPWRON=HI
ANY
STATE
RESET STATE
RESPWRON=LO
START SYSTEM RESET PULSE TIMER
WHEN HOT_RESET=HI
RESET
TIMER EXPIRES
V(SYS_IN) >
AND
V(OUT) > V
V
(LOW_SYS)
V(AC) > V
UVLO
OR
V(USB) > V
UVLO
OR
V(BAT ) > V
UVLO
NO PGOOD
FAULT
STANDBY
ON
STANDBY
OFF
PGOOD
FAULT
PGOOD
FAULT
V(OUT) < V
UVLO
RESPWRON=LO
V(SYS_IN) <
OR
POWER
CYCLE
AND
SLEEP NOT SET BY
THERMAL FAULT
THERMAL
FAULT
V(HOT_RESET)=LO
OR
I2C SOFT_RESET
REGISTER BIT
SOFT_RST = HI
V(HOT_RESET) = HI OR
I2C SOFT_RESET
REGISTER BIT
SOFT_RESET = LO
(SELF CLEARED )
V(HOT _RESET)=LO
OR
I2C SOFT_RESET
REGISTER BIT
SOFT_RST= HI
PGOOD FAULT :
A NON - MASKED BIT OF THE
POWER _GOOD I2C REGISTER TOGGLES
FROM LO TO HI
FROM LO TO HI
STANDBY ON
: SM1 AND SM2 SET IN STANDBY
MODE BY GPIO OR I 2C COMMAND
STANDBY OFF :
SM1 AND SM2 EXIT STANDBY
MODE BY GPIO OR I2C COMMAND
RESET TIMER :
VALUE SET BY CAPACITOR
CONNECTED TO TRSTPWON PIN
I2C SOFT_RESET BIT
LOCATED IN
SOFT_RESET REGISTER , BIT B0
POWER UP
OR
I2C SOFT_RESET
REGISTER
BIT SLEEP _MODE = HI
(SELF-CLEARED)
RESPWRON = LO
UVLO
V
(LOW_SYS)
LOAD POWER UP DEFAULTS IN
I2C REGISTERS
CONNECT AC , USB OR BAT PIN TO
OUT PIN
DISABLE POWER GOOD FAULT
DETECTION
INT PIN = HIGH IMPEDANCE
POR_FLAG= HI
POWER UP DEFAULTS LOADED
IN ALL I2C REGISTERS
(Except INT_ACKn)
POWER DOWN RAILS,
WAIT 5 msec
SLVS658B – MARCH 2006 – REVISED FEBRUARY 2007
The TPS65810 has a state machine that controls the device power up and power down sequencing. The main
operating modes are shown in the state diagram below:
operating modes are shown in the state diagram below:
Figure 28. TPS65810 State Diagram
POWER UP – If the AC, USB and BAT pin voltages are below the internal UVLO threshold V
UVLO
(2.5 V typ) all
IC blocks are disabled and the TPS65810 is not operational, with all functions OFF. When an external power
source or battery with voltage greater than the V
source or battery with voltage greater than the V
UVLO
voltage threshold is applied to AC/USB or BAT pins the
internal TPS65810 references are powered up, biasing internal circuits. When all the main internal supply rails
are active the TPS65810 I
are active the TPS65810 I
2
C registers are set to the power-up default values, shown below:
34
Copyright © 2006–2007, Texas Instruments Incorporated
Product Folder Link(s):