參數(shù)資料
型號(hào)： TPS2552DRVR-1
廠商： TEXAS INSTRUMENTS INC
元件分類： 電源管理
英文描述： 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO6
封裝： GREEN, PLASTIC, SON-6
文件頁(yè)數(shù)： 13/32頁(yè)
文件大?。?/td> 1025K
代理商： TPS2552DRVR-1
OUT
IN
GND
FAULT
ILIM
EN
Input
PowerPad
Output
0.1 F
m
R
100k
FAULT
W
C
0.1 F
RETRY
m
R
20k
ILIM
W
CLOAD
RLOAD
TPS2553
OUT
IN
GND
FAULT
ILIM
EN
ExternalLogic
Signal & Driver
PowerPad
Output
Input
0.1 F
m
R
100k
FAULT
W
C
0.1 F
RETRY
m
R
20k
ILIM
W
CLOAD
RLOAD
TPS2553
SLVS841D
– NOVEMBER 2008 – REVISED JUNE 2011
AUTO-RETRY FUNCTIONALITY
Some applications require that an overcurrent condition disables the part momentarily during a fault condition
and re-enables after a pre-set time. This auto-retry functionality can be implemented with an external resistor and
capacitor. During a fault condition, FAULT pulls low disabling the part. The part is disabled when EN is pulled
low, and FAULT goes high impedance allowing CRETRY to begin charging. The part re-enables when the voltage
on EN reaches the turnon threshold, and the auto-retry time is determined by the resistor/capacitor time
constant. The part will continue to cycle in this manner until the fault condition is removed.
Figure 25. Auto-Retry Functionality
Some applications require auto-retry functionality and the ability to enable/disable with an external logic signal.
The figure below shows how an external logic signal can drive EN through RFAULT and maintain auto-retry
functionality. The resistor/capacitor time constant determines the auto-retry time-out period.
Figure 26. Auto-Retry Functionality With External EN Signal
20
Copyright
2008–2011, Texas Instruments Incorporated
相關(guān)PDF資料
PDF描述
TC1303A-1B2EUNTR 0.5 A SWITCHING REGULATOR, 2400 kHz SWITCHING FREQ-MAX, PDSO10
TC1303A-1F3EMF 0.5 A SWITCHING REGULATOR, 2400 kHz SWITCHING FREQ-MAX, PDSO10
TC1303A-1I2EMF 0.5 A SWITCHING REGULATOR, 2400 kHz SWITCHING FREQ-MAX, PDSO10
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相關(guān)代理商/技術(shù)參數(shù)
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