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TPS22950 датащи(PDF) 12 Page - Texas Instruments

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номер детали TPS22950
подробное описание детали  TPS22950 5.5-V, 2.7-A, 34-m廓 Adjustable Current Limited Load Switch
PDF  26 Pages
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производитель  TI [Texas Instruments]
домашняя страница  http://www.ti.com
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TPS22950 датащи(HTML) 12 Page - Texas Instruments

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I
OUT
t
LIM
I
LIM
Figure 8-2. Transient Current Limit Waveform
8.3.1.1 Adjusting the current limit
The current limit is adjusted by connecting an external resistor from the ILIM pin to GND. The current limit
resistor can be chosen using the equation:
ILIM = 1.18 × (RILIM)-1.072
(1)
8.3.2 Reverse Current Blocking (RCB)
In a scenario where the device is enabled and VOUT is greater than VIN, there is potential for reverse current to
flow through the pass FET or the body diode. When the reverse current threshold is exceeded (about 900 mA),
there is a delay time (tRCB) before the switch turns off to stop the current flow. The switch will remain off and
block reverse current as long as the reverse voltage condition exists. Once VOUT has dropped below the release
voltage threshold (VRCB) the device will turn back on. When the ON pin is pulled low, the device will constantly
block reverse current.
8.4 Device Functional Modes
The tables below summarize the Device Functional Modes.
Table 8-1. Output Connection Table
ON
Fault Condition
VOUT State
FLT State
L
N/A
Hi-Z
Hi-Z
H
None
VIN (via RON)
Hi-Z
H
Output Short
Current Limited
Hi-Z
H
Thermal Shutdown
Hi-Z
L
H
Reverse Current
Hi-Z
L
Table 8-2. Smart-ON Functional Modes (RPD,ON)
ON
ON Pin
≤ VIL
Pull Down Active
≥ VIH
No Pull Down
TPS22950
SLVSFJ2 – DECEMBER 2020
www.ti.com
12
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Product Folder Links: TPS22950



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