參數(shù)資料
型號(hào)： 2376
廠(chǎng)商： Texas Instruments, Inc.
英文描述： IEEE 802.3af PoE POWERED DEVICE CONTROLLERS WITH AUTO-RETRY
中文描述： IEEE 802.3af標(biāo)準(zhǔn)的PoE用電設(shè)備控制器，自動(dòng)重試
文件頁(yè)數(shù)： 3/23頁(yè)
文件大?。?/td> 649K
代理商： 2376
www.ti.com
RECOMMENDED OPERATING CONDITIONS
ELECTRICAL CHARACTERISTICS
V
(VDD)
= 48 V, R
(DET)
= 24.9 k
, R
(CLASS)
= 255
, R
(ILIM)
= 178 k
, and –40
°
C
≤
T
J
≤
125
°
C, unless otherwise noted. Positive
currents are into pins. Typical values are at 25
°
C. All voltages are with respect to VSS unless otherwise noted.
TPS2375-1
TPS2377-1
SLVS570–MARCH 2005
MIN
MAX
57
UNIT
V
V
mA
k
mA
°
C
°
C
VDD, PG, RTN
UVLO
RTN
CLASS
0
0
0
Input voltage range
5
Operating current range (sinking)
Classification resistor
(1)
Inrush limit program resistor
(1)
Sinking current
Operating junction temperature
Operating free–air temperature
350
4420
500
255
62.5
R
(ILIM)
PG
0
2
T
J
T
A
-40
-40
125
85
(1)
Voltage should not be externally applied to CLASS and ILIM.
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
DETECTION
DET open, V
(VDD)
= V
(RTN)
= 1.9 V, measure
I
(VDD)
+ I
(RTN)
DET open, V
(VDD)
= V
(RTN)
= 10.1 V, measure
I
(VDD)
+ I
(RTN)
V
(DET)
= V
(VDD)
= 57 V, measure I
(DET)
V
(RTN)
= V
,
R
= 24.9 k
,
measure I
(VDD)
+ I
(RTN)
+
I
(DET)
Offset current
0.3
3
μA
Sleep current
4
12
μA
DET leakage current
0.1
5
μA
V
(VDD)
= 1.4 V
53.7
56
58.3
μA
Detection current
V
(VDD)
= 10.1 V
395
410
417
μA
CLASSIFICATION
R
(CLASS)
= 4420
, 13
≤
V
(VDD)
≤
21 V
R
(CLASS)
= 953
, 13
≤
V
(VDD)
≤
21 V
R
(CLASS)
= 549
, 13
≤
V
(VDD)
≤
21 V
R
(CLASS)
= 357
, 13
≤
V
(VDD)
≤
21 V
R
(CLASS)
= 255
, 13
≤
V
(VDD)
≤
21 V
Regulator turns on, V
(VDD)
rising
Regulator turns off, V
(VDD)
rising
Hysteresis
2.2
2.4
2.8
10.3
10.6
11.3
I
(CLASS)
Classification current
(1)
17.7
18.3
19.5
mA
27.1
28
29.5
38
39.4
41.2
V
(CL_ON)
V
(CU_OFF)
V
(CU_H)
Classification lower threshold
10.2
11.3
13.0
V
21
21.9
23
V
Classification upper threshold
0.5
0.78
1
V
Leakage current
V
(CLASS)
= 0 V, V
(VDD)
= 57 V
1
μA
PASS DEVICE
r
DS(on)
On resistance
I
(RTN)
= 300 mA
V
(VDD)
= V
(RTN)
= 30 V
V
(RTN)
= 1 V
V
(RTN)
= 2 V, R
(ILIM)
= 178 k
V
falling, R
= 178 k
, inrush
state
→
normal operation
R
(ILIM)
= 69.8 k
, V
= 5 V,
I
= 30 mA
→
300 mA, V
(VDD)
increasing
past upper UVLO
0.58
1.0
μA
Leakage current
15
Current limit
405
461
515
mA
I
(LIM)
Inrush limit
100
130
180
mA
85%
91%
100%
Inrush current termination
(2)
15
25
Current rise time into inrush
μs
Apply load
∞→
20
, time measured to
I
(RTN)
= 45 mA
V
(VDD)
= 15 V, V
(UVLO)
= 0 V
2
2.5
Current limit response time
μs
Leakage current, ILIM
1
μA
(1)
(2)
Classification is tested with exact resistor values. A 1% tolerance classification resistor ensures compliance with IEEE 802.3af limits.
This parameter specifies the RTN current value, as a percentage of the steady state inrush current, below which it must fall to make PG
assert (open-drain).
3
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