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STHS4257A1 датащи(PDF) 10 Page - STMicroelectronics

номер детали STHS4257A1
подробное описание детали  IEEE 802.3af PoE Powered Device (PD) interface controller with integrated signature resistor
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производитель  STMICROELECTRONICS [STMicroelectronics]
домашняя страница  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

STHS4257A1 датащи(HTML) 10 Page - STMicroelectronics

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Obsolete
Product(s)
- Obsolete
Product(s)
Summary description
STHS4257A, STHS4257A1, STHS4257L, STHS4257L1
10/18
Figure 7.
Block diagram (STHS4257A1/L1)
1.
Ref.1 = ILIMIT HIGH
2.
Ref. 2 = ILIMIT LOW
Figure 8.
Typical application circuit (STHS4257A1/L1) with a DC/DC converter
RS
ref1(1)
ref2(2)
25k
Signature
Resistor
9k
Ω
16k
Ω
Power Good
Input
Current
Limit
Classification
Current Load
Control
Circuits
+
+
EN
EN
VIN
VOUT
GND
AI12208a
PWRGD
1
2
3
4
8
7
6
5
ref
NC
NC
RCLASS
SIGDISA
Signature Disable
Power
MOSFET
100
k
Ω
5µF
(min)
100V
0.1µF
100V
SMAJ58A
RCLASS
VIN
48V from
power sourcing
equipment (PSE)
AI12209a
RCLASS
SHDN
~
~
+
+
+
3V
to logic
STHS4257A1/L1
Powered Device (PD)
Switching
Power
Supply
Diode
Bridge
VIN
DF01S
GND
VOUT
SIGDISA
RTN
PWRGD
C1
C2


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