參數(shù)資料
型號: TPS65800RTQTG4
廠商: TEXAS INSTRUMENTS INC
元件分類: 電源管理
英文描述: 8-CHANNEL POWER SUPPLY SUPPORT CKT, PQCC56
封裝: 8 X 8 MM, GREEN, PLASTIC, QFN-56
文件頁數(shù): 29/98頁
文件大?。?/td> 2077K
代理商: TPS65800RTQTG4
www.ti.com
SYSTEM SEQUENCING AND TPS65800 OPERATING MODES
LOADPOWERUP DEFAULTSIN
I2CREGISTERS
CONNECT AC , USBORBAT PIN TO
OUT PIN
DISABLEPOWERGOODFAULT
DETECTION
INT PIN = HIGHIMPEDANCE
POR_FLAG= HI
SLEEP STATE
ONLY RTC _LDOISON
POWERPATH ACTIVE
RESPWRON = 0
REGISTERCONTENTSNOT RESET
INTERRUPT CLEARED
OFF
PROCESSOR
STANDBY STATE
RESPWRON = HI
PGFORSM1&SM2
ismasked
ENABLESTATE
RESPWRON=LO,
START BOOT - UP TIMER
SEQUENCESTATE
START INTEGRATED
SUPPLY START - UP SEQUENCE
RESPWRON = LO
POWERGOOD
CHECKSTATE
RESPWRON=HI
ENABLEPOWERGOODCOMPARATORS
INT PINMODESET BY INTERRUPT
CONTROLLER
NORMAL MODE
RESPWRON=HI
ANY
STATE
RESETSTATE
RESPWRON=LO
START SYSTEMRESET PULSE TIMER
WHENHOT_RESET=HI
RESET
TIMEREXPIRES
V(SYS_IN) >
AND
V(OUT) > V
V
(LOW_SYS)
V(AC) > VUVLO
OR
V(USB) > VUVLO
OR
V(BAT ) > VUVLO
NOPGOOD
FAULT
STANDBY
ON
STANDBY
OFF
PGOOD
FAULT
PGOOD
FAULT
V(OUT) < VUVLO
RESPWRON=LO
V(SYS_IN) <
OR
POWER
CYCLE
AND
SLEEP NOT SET BY
THERMAL FAULT
THERMAL
FAULT
V(HOT_RESET)=LO
OR
I2CSOFT_RESET
REGISTERBIT
SOFT_RST = HI
V(HOT_RESET)=HI OR
I2CSOFT_RESET
REGISTERBIT
SOFT_RESET = LO
(SELFCLEARED )
V(HOT _RESET)=LO
OR
I2CSOFT_RESET
REGISTERBIT
SOFT_RST= HI
PGOODFAULT :
A NON - MASKEDBIT OF THE
POWER _GOODI2CREGISTER TOGGLES
FROMLO TOHI
STANDBY ON
: SM1 ANDSM2 SET INSTANDBY
MODEBY GPIOORI 2CCOMMAND
STANDBY OFF :
SM1 ANDSM2 EXIT STANDBY
MODEBY GPIOOR I2CCOMMAND
RESETTIMER :
VALUESET BY CAPACITOR
CONNECTED TO TRSTPWONPIN
I2CSOFT_RESETBIT
LOCATEDIN
SOFT_RESET REGISTER , BIT B0
POWERUP
OR
I2CSOFT_RESET
REGISTER
BIT SLEEP _MODE = HI
(SELF-CLEARED)
UVLO
V
(LOW_SYS)
SLVS606C – SEPTEMBER 2005 – REVISED FEBRUARY 2007
The TPS65800 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:
Figure 28. TPS65800 State Diagram
POWER-UP– If the AC, USB and BAT pin voltages are below the internal UVLO threshold VUVLO (2.5 V typ) all
IC blocks are disabled and the TPS65800 is not operational, with all functions OFF. When an external power
source or battery with voltage greater than the VUVLO voltage threshold is applied to AC/USB or BAT pins the
internal TPS65800 references are powered up, biasing internal circuits. When all the main internal supply rails
are active the TPS65800 I2C registers are set to the power-up default values, shown below:
35
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