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TPS2373 Datasheet(PDF) 10 Page - Texas Instruments

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Part # TPS2373
Description  High-Power PoE PD Interface with Advanced Startup
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Manufacturer  TI1 [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI1 - Texas Instruments

TPS2373 Datasheet(HTML) 10 Page - Texas Instruments

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12V &
10V
22V &
21.25V
38.1V &
32V
VDD
1
0
S
R
Q
Inrush limit
threshold
Current limit
threshold
VSS
RTN
CLSA
APD
VSS
DEN
800Ps
2.5V
REG.
Detection
Comp.
4V
1.5V
&1.4V
Hotswap
MOSFET
Class
Comp.
Mark
Comp.
APD
Comp.
15V
UVLO
Comp.
OTSD
IRTN sense,1 if < 90% of inrush and current limit
1 = inrush
Signals referenced to VSS unless
otherwise noted
Class
Comp.
5V & 4V
0 = current limit
Inrush latch
RTN
1.9ms
1
0
IRTN sense
State
Eng.
Mark Comp Out
UVLO Comp Out
VSS
S
R
Q
High if over
temperauture
RTN
PG
VC_OUT
Regulator
VC_IN
TPH, TPL
/BT
RTN
Inrush
Timing
Startup
Control
RTN
8.5V
7V
4V
UVLO_SEL
5.5V
RTN
Automatic
MPS Control
RTN
RTN
RTN
RTN
MPS
threshold
MPS_DUTY
AMPS_CTRL
VDD
24V
REF
1.5V
Bias
Oscillator
Class Comp Out
CLSB
Mark R
MPS Enable
Copyright © 2017, Texas Instruments Incorporated
10
TPS2373
SLUSCD1 – APRIL 2017
www.ti.com
Product Folder Links: TPS2373
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Copyright © 2017, Texas Instruments Incorporated
7.2 Functional Block Diagram
7.3 Feature Description
7.3.1 APD Auxiliary Power Detect
The APD pin is used in applications that may draw power either from the Ethernet cable or from an auxiliary
power source. When a voltage of more than about 1.65 V is applied on the APD pin relative to RTN, the
TPS2373 does the following:


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