參數(shù)資料
型號： LTC4257IS8#PBF
廠商： LINEAR TECHNOLOGY CORP
元件分類： 網(wǎng)絡(luò)接口
英文描述： IEEE 802.3af PD Power over Ethernet Interface Controller; Package: SO; No of Pins: 8; Temperature Range: -40°C to +85°C
中文描述： DATACOM, NETWORK INTERFACE SUPPORT CIRCUIT, PDSO8
封裝： 0.150 INCH, LEAD FREE, PLASTIC, SOP-8
文件頁數(shù)： 15/20頁
文件大小： 258K
代理商： LTC4257IS8#PBF
LTC4257
4
4257fb
Input Current vs Input Voltage
INPUT VOLTAGE (V)
0
INPUT
CURRENT
(mA)
1
2
3
–45
–55
4257 G04
–60
–40
–50
EXCLUDES ANY LOAD CURRENT
TA = 25°C
Normalized UVLO Threshold
vs Temperature
TYPICAL PERFOR A CE CHARACTERISTICS
UW
VOUT Leakage Current
Input Current vs Input Voltage
INPUT VOLTAGE (V)
0
INPUT
CURRENT
(mA)
10
20
30
40
50
–10
–20
–30
–40
4257 G01
–50
–60
CLASS 4
CLASS 3
CLASS 2
CLASS 1
CLASS 0
TA = 25°C
INPUT VOLTAGE (V)
0
INPUT
CURRENT
(mA)
0.1
0.2
0.3
0.4
0.5
–2
–4
–6
–8
4357 G02
–10
TA = 25°C
INPUT VOLTAGE (V)
–12
9.0
INPUT
CURRENT
(mA)
9.5
10.5
11.0
11.5
–14
–16
4257 G03
10.0
–18
–20
–22
12.0
85
°C
–40
°C
CLASS 1 OPERATION
Input Current vs Input Voltage
25k Detection Range
Input Current vs Input Voltage
INPUT VOLTAGE (V)
–1
22
V1:
V2:
SIGNATURE
RESISTANCE
(k
)
23
25
26
27
–3
–5
4257 G05
24
–7
–9
–6
–10
–2
–4
–8
28
RESISTANCE =
DIODES: S1B
TA = 25°C
=
V
I
V2 – V1
I2 – I1
IEEE UPPER LIMIT
IEEE LOWER LIMIT
LTC4257 + 2 DIODES
LTC4257 ONLY
Signature Resistance
vs Input Voltage
TEMPERATURE (
°C)
–40
–2
NORMALIZED
UVLO
THRESHOLD
(%)
–1
0
1
2
–20
0
20
40
4257 G06
60
80
APPLICABLE TO TURN-ON
AND TURN-0FF THRESHOLDS
Power Good Output Low Voltage
vs Current
CURRENT (mA)
0
V
PG_OUT
(V)
2
3
8
4257 G07
1
0
2
4
6
10
4
TA = 25°C
VOUT PIN VOLTAGE (V)
0
V
OUT
CURRENT
(
A)
30
60
120
90
20
40
42571 G09
60
VIN = 0V
TA = 25°C
Current Limit vs Input Voltage
INPUT VOLTAGE (V)
–40
CURRENT
LIMIT
(mA)
345
355
–60
4257 G09
335
325
–45
–50
–55
375
365
VOUT = VIN + 5V
85
°C
25
°C
–40
°C
相關(guān)PDF資料
PDF描述
LTC4257IS8#TRPBF IEEE 802.3af PD Power over Ethernet Interface Controller; Package: SO; No of Pins: 8; Temperature Range: -40°C to +85°C
LTC4259ACGW-1#PBF Quad IEEE 802.3af Power over Ethernet Controller with AC Disconnect; Package: SSOP; No of Pins: 36; Temperature Range: 0°C to +70°C
LTC4259ACGW-1#TRPBF Quad IEEE 802.3af Power over Ethernet Controller with AC Disconnect; Package: SSOP; No of Pins: 36; Temperature Range: 0°C to +70°C
LTC4259AIGW-1#PBF Quad IEEE 802.3af Power over Ethernet Controller with AC Disconnect; Package: SSOP; No of Pins: 36; Temperature Range: -40°C to +85°C
LTC4259AIGW-1#TRPBF Quad IEEE 802.3af Power over Ethernet Controller with AC Disconnect; Package: SSOP; No of Pins: 36; Temperature Range: -40°C to +85°C
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
LTC4258 制造商:LINER 制造商全稱:Linear Technology 功能描述:Quad IEEE 802.3at Power over Ethernet Controller
LTC4258_09 制造商:LINER 制造商全稱:Linear Technology 功能描述:Quad IEEE 802.3af Power over Ethernet Controller with Integrated Detection
LTC4258CGW 制造商:Linear Technology 功能描述:POWER OVER ETHERNET CONTROLLER
LTC4258CGW#PBF 功能描述:IC POE 802.3AF QUAD 36-SSOP RoHS:是 類別:集成電路 (IC) >> 接口 - 控制器 系列:- 標(biāo)準(zhǔn)包裝:2,450 系列:- 控制器類型:SPI 總線至 I²C 總線橋接 接口:I²C，串行，SPI 電源電壓:2.4 V ~ 3.6 V 電流 - 電源:11mA 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:24-VFQFN 裸露焊盤 供應(yīng)商設(shè)備封裝:24-HVQFN（4x4） 包裝:托盤 配用:568-3511-ND - DEMO BOARD SPI TO I2C 其它名稱:935286452157SC18IS600IBSSC18IS600IBS-ND
LTC4258CGW#TR 制造商:Linear Technology 功能描述:POWER OVER ETHERNET CONTROLLER
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