參數(shù)資料
型號(hào)： 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)： 31/98頁
文件大?。?/td> 2077K
代理商： TPS65800RTQTG4
www.ti.com
OUT
SM2
RESPWRON
INT
RESET DELAY
PROGRAMMEDBY EXTERNAL CAPACITOR
CONNECTED TOPIN TRSTPWON
Power Applied
SYS_IN
RTC_OUT
LDO2
LDO5
LDO3
VLOW_SYS
SEQUENCING
RESET
NORMAL
NOPOWER
LDO1
I CRegistersLoadedFrom
E PROM
2
ENABLE
HI-Z
AC,USB,ORBAT
VUVLO
HI-Z
t
DLY(D2)
t
DLY(D1)
LD04
SM1
SLVS606C – SEPTEMBER 2005 – REVISED FEBRUARY 2007
Figure 29. TPS65800 Supply Sequencing Timing
RESET – When the reset state starts the RESPWRON output is LO. The user can program the reset timer value
selecting the value of the external capacitor connected to pin TRSTPWON, as shown below:
T(RESET) = KRESET× CTRSTPWON; where KRESET is the reset timer constant (1 ms/nF typ)
The TPS65800 RESPWRON pin should be used to reset the external host. During the external host reset
(RESPWRON = LO) the I2C SDA and SCL pins are not used to access TPS65800 internal registers. If a
non-standard configuration is used to reset the system the SDA and SCL lines should not be used to
communicate with the TPS65800 until RESPWRON = HI, in order to avoid overwriting the integrated power
supply internal power-up settings during the sequencing mode.
The power good comparators are masked during the reset mode. The reset mode ends when the reset timer
expires, and the TPS65800 goes into the power good check mode.
The RESPWRON signal set to a high level is the proper signal to use as an indicator that the device has
transitioned out of the reset state. During the power-up sequence the RESPWRON pin is asserted LOW until the
RESET TIMER expires. The RESET TIME (treset = 1ms/nF × CTRSTPWON) can be programmed via a capacitor
between the TRSTPWON pin and ground.
37
相關(guān)PDF資料
PDF描述
TPS65800RTQT 8-CHANNEL POWER SUPPLY SUPPORT CKT, PQCC56
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