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TPS2552DBVT Datasheet(PDF) 21 Page - Texas Instruments

Part # TPS2552DBVT
Description  TPS255xx Precision Adjustable Current-Limited Power-Distribution Switches
PDF  44 Pages
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Manufacturer  TI2 [Texas Instruments]
Direct Link  https://www.ti.com
Logo TI2 - Texas Instruments

TPS2552DBVT Datasheet(HTML) 21 Page - Texas Instruments

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OUT
IN
GND
FAULT
ILIM
EN
External Logic
Signal & Driver
Power Pad
Output
Input
0.1 F
m
R
100 k
FAULT
W
C
0.1 F
RETRY
m
R
20 k
ILIM
W
CLOAD
RLOAD
TPS2553
Copyright © 2016, Texas Instruments Incorporated
OUT
IN
GND
FAULT
ILIM
EN
Input
Power Pad
Output
0.1 F
m
R
100 k
FAULT
W
C
0.1 F
RETRY
m
R
20 k
ILIM
W
CLOAD
RLOAD
TPS2553
Copyright © 2016, Texas Instruments Incorporated
21
TPS2552, TPS2553, TPS2552-1, TPS2553-1
www.ti.com
SLVS841F – NOVEMBER 2008 – REVISED AUGUST 2016
Product Folder Links: TPS2552 TPS2553 TPS2552-1 TPS2553-1
Submit Documentation Feedback
Copyright © 2008–2016, Texas Instruments Incorporated
10.2.2 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 device continues to cycle in this manner until the fault condition is removed.
Figure 27. Auto-Retry Functionality
Some applications require auto-retry functionality and the ability to enable or disable with an external logic signal.
Figure 28 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 28. Auto-Retry Functionality With External EN Signal
10.2.2.1 Design Requirements
For this example, use the parameters shown in Table 3.
Table 3. Design Requirements
PARAMETER
VALUE
Input voltage
5 V
Output voltage
5 V
Current
1200 mA



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