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參數(shù)資料
| 型號： | TPS650732TRSLRQ1 |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 電源管理 |
| 英文描述： | POWER SUPPLY SUPPORT CKT, PQCC48 |
| 封裝： | 6 X 6 MM, 0.4 MM PITCH, GREEN, PLASTIC, QFN-48 |
| 文件頁數(shù)： | 28/90頁 |
| 文件大?。?/td> | 1375K |
| 代理商： | TPS650732TRSLRQ1 |
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DCDCconvertersstart
LDOsstart
dependingonsequencingoption
PB_IN=0
PB_IN=0 (fallingedge
detect)
POWER_ON=0
PowerOFF
SYS = OFF
PowerOFF 2
SYS = ON
voltageat ACappliedOR
voltageatUSBappliedOR
PB_IN=0
AC=1 OR
USB=1
WAIT FOR
POWERON
SYS = ON
YES
NO
POWER
ON_1
SYS = ON
POWER
ON_2
SYS = ON
POWER_ON=1
PB_IN=1 &&
POWER_ON=1
POWER
OFF 3
SYS = ON
DCDCconverters
powerdown
LDOspowerdown
dependingon
sequencingoption
allvoltagespowereddown
voltageat ACappliedOR
voltageatUSBapplied
allvoltagespowereddown
SLVSAP7 – JANUARY 2011
www.ti.com
In addition to this, there is a 15s timer which will drive PGOOD=LOW for 0.5ms when 15s are expired. The 15s
timer is enabled again when PB_IN is released HIGH. If PB_IN is pulled LOW for 30s continuously, PGOOD will
be driven LOW only once after the first 15s. When PGOOD is driven LOW due to PB_IN=low for 15s, all
registers in are set to their default value. See Figure 33.
Figure 33. State Machine
PB_OUT
This pin is a status output. PB_OUT is used as the wake-up interrupt to an application processor based on the
status of PB_IN. If PB_IN=LOW, PB_OUT = LOW (after 50ms debounce). If PB_IN=HIGH, PB_OUT= high
impedance (HIGH).
The pull-up resistor for this open drain output must not be connected directly to the battery as this may cause a
leakage path when the power path (SYS) is turned off.
POWER_ON
This pin is an input to the PMU which needs to be pulled HIGH for the PMU to stay in POWER ON_2-state once
PB_IN is released. Once this pin is pulled LOW while PB_IN=LOW, the PMU is shutting down without delay,
turning off the DCDC converters and the LDOs. If POWER_ON is pulled HIGH while there is power at USB or
AC, the will enter POWER ON_2-state and start the DCDC converters and LDOs according to the sequence
programmed. See Figure 33.
34
Copyright 2011, Texas Instruments Incorporated
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