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TPS23851DCER Datasheet(PDF) 4 Page - Texas Instruments

No. de pieza TPS23851DCER
Descripción Electrónicos  Quad IEEE 802.3at Power-Over-Ethernet PSE Controller
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Fabricante Electrónico  TI1 [Texas Instruments]
Página de inicio  http://www.ti.com
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TPS23851DCER Datasheet(HTML) 4 Page - Texas Instruments

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TPS23851
SLUSAB3 – SEPTEMBER 2010
www.ti.com
ELECTRICAL CHARACTERISTICS
Conditions are -20
≤ TJ ≤ 125°C unless otherwise noted. VVDD = 3.3 V, VVEE = -48 V, VDGND = VAGND, and all outputs are
unloaded, unless otherwise noted. Positive currents are into pins. Current sense resistor = 0.5
Ω. Typical values are at 25°C.
All voltages are with respect to DGND unless otherwise noted. Operating registers loaded with default values unless
otherwise noted.
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
Input Supply
IVDD
VDD current consumption
2
5
mA
IVEE
VEE current consumption
-7
-10
Detection
First detection point, DET = 0 V
145
165
190
IDISC
Detection current
µA
Second detection point, DET = 0 V
245
275
310
VDETECT
Open circuit detection voltage
-25
-18.11
-17
V
Rejected resistance low
RREJ_LOW
2.8
15
range
Rejected resistance high
RREJ_HI
33
55
range
K
RACCEPT
Accepted resistance range
19
25
26.5
RSHORT
Shorted port threshold
1.5
ROPEN
Open port threshold
55
Classification
VCLASS
Classification voltage
At DET pin
-21
-18.5
-16.4
V
ICLASS_Lim
Classification current limit
At 0 V
52.5
70
95
mA
Gate
VGOH
Gate drive voltage
VGATEn-VEE , IGATE = -1 µA
8
10.5
V
Gate sinking current with port
IGO-
VGATEn-VEE = 5 V
70
100
120
short-circuit detected
mA
IGO+
Gate sourcing current
VGATEn = VVEE
0.05
1.5
Gate turn off time with
From SHDNn to VGATEn-VEE < 1 V, SENn
tD_off
900
/SHDNn
connected to VEE
Gate turn off time from port
From port off command to VGATEn-VEE < 1 V, SENn
tP_off_CMD
900
off command
connected to VEE
µs
Gate turn off time with
From RESET low to VGATEn-VEE < 1V, SENn
tP_off_RST
1
5
RESET
connected to VEE
Gate turn on and turn off di/dt
tP_didt
From port turn on/off command or from SHDN input
150
control period
OUT Pin Sense
VPGT
Power good threshold
Measured at VOUT
1.5
2.13
3
V
Resistance from OUT to
2.5
M
Ω
AGND
VOUT = 0 V
-6
5
IOUT
OUT pin bias current
-10 V > VOUT > -30 V
-18
0
µA
VOUT = -48
-30
-20
-10
4
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Product Folder Link(s): TPS23851


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