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TPS2069CDGNR Datasheet(PDF) 16 Page - Texas Instruments

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No. de Pieza. TPS2069CDGNR
Descripción  Current Limited, Power-Distribution Switches
Descarga  39 Pages
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Fabricante  TI1 [Texas Instruments]
Página de inicio  http://www.ti.com
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TPS2069CDGNR Datasheet(HTML) 16 Page - Texas Instruments

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IOUT
IOS
Decreasing
Load
Resistance
VIN
0 A
0 V
Slope = -RDS(ON)
IOUT
IOS
Decreasing
Load
Resistance
VIN
0 A
0 V
Slope = -RDS(ON)
IOC
Current Limit
with Peaking
Flat Current
Limit
16
TPS2000C, TPS2001C, TPS2041C, TPS2051C, TPS2061C
TPS2065C, TPS2065C-2, TPS2068C, TPS2069C, TPS2069C-2
SLVSAU6H – JUNE 2011 – REVISED APRIL 2016
www.ti.com
Product Folder Links: TPS2000C TPS2001C TPS2041C TPS2051C TPS2061C TPS2065C TPS2065C-2 TPS2068C
TPS2069C TPS2069C-2
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Copyright © 2011–2016, Texas Instruments Incorporated
Feature Description (continued)
Figure 22. Current Limit Profiles
8.3.5 FLT
The FLT open-drain output is asserted (active low) during an overload or overtemperature condition. A 9-ms
deglitch on both the rising and falling edges avoids false reporting at start-up and during transients. A current
limit condition shorter than the deglitch period clears the internal timer upon termination. The deglitch timer does
not integrate multiple short overloads and declare a fault. This is also true for exiting from a faulted state. An
input voltage with excessive ripple and large output capacitance may interfere with operation of FLT around IOS
as the ripple drives the TPS20xxC and TPS20xxC-2 in and out of current limit.
If the TPS20xxC and TPS20xxC-2 are in current limit and the overtemperature circuit goes active, FLT goes true
immediately (see Figure 27); however, the exiting this condition is deglitched (see Figure 29). FLT is tripped just
as the knee of the constant-current limiting is entered. Disabling the TPS20xxC and TPS20xxC-2 clears an active
FLT as soon as the switch turns off (see Figure 26). FLT is high impedance when the TPS20xxC and TPS20xxC-
2 are disabled or in undervoltage lockout (UVLO).
8.3.6 Output Discharge
A 470-
Ω (typical) output discharge dissipates stored charge and leakage current on OUT when the TPS20xxC is
in UVLO or disabled. The pulldown circuit loses bias gradually as VIN decreases, causing a rise in the discharge
resistance as VIN falls towards 0 V. The TPS20xxC-2 does not have this function. The output is be controlled by
an external loadings when the device is in ULVO or disabled.
8.4 Device Functional Modes
There are no other functional modes.


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