參數(shù)資料
型號： LTC4278CDKD#TRPBF
廠商： Linear Technology
文件頁數(shù)： 38/42頁
文件大小： 0K
描述： IC PD IEEE 802.3AT 25.5W 32-DFN
標準包裝： 2,500
控制器類型： 供電設備接口控制器（PD）
接口： IEEE 802.3af
電源電壓： 4.5 V ~ 20 V
電流 - 電源： 6.4mA
工作溫度： 0°C ~ 70°C
安裝類型： 表面貼裝
封裝/外殼： 32-WFDFN 裸露焊盤
供應商設備封裝： 32-DFN（7x4）裸露焊盤
包裝： 帶卷 (TR)
LTC4278
5
4278fc
Note 1: Stresses beyond those listed under Absolute Maximum Ratings
may cause permanent damage to the device. Exposure to any Absolute
Maximum Rating condition for extended periods may affect device
reliability and lifetime.
Note 2: Pins with 100V absolute maximum guaranteed for T ≥ 0°C,
otherwise 90V.
Note 3: Active high PWRGD internal clamp self-regulates to 14V with
respect to VNEG.
Note 4: All voltages are with respect to VPORTN pin unless otherwise noted.
Note 5: Input voltage specifications are defined with respect to LTC4278
pins and meet IEEE 802.3af/at specifications when the input diode bridge
is included.
Note 6: Signature resistance is measured via the V/I method with the
minimum V of 1V. The LTC4278 signature resistance accounts for the
additional series resistance in the input diode bridge.
Note 7: An invalid signature after the 1st classification event is mandated
by the IEEE802.3at standard. See the Applications Information section.
Note 8: Class accuracy is with respect to the ideal current defined as
1.237/RCLASS and does not include variations in RCLASS resistance.
Note 9: This parameter is assured by design and wafer level testing.
Note 10: VCC = 14V; PG, SG Open; VCMP = 1.4V, VSENSE– = 0V, RCMP = 1k,
RtON = 90k, RPGDLY = 27.4k, RENDLY = 90k, unless otherwise specified. All
voltages are with respect to GND.
Note 11: Supply current does not include gate charge current to the
MOSFETs. See the Applications Information section.
Note 12: Component value range guaranteed by design.
ELECTRICAL CHARACTERISTICS The
l
denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C.
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
Load Compensation
Load Compensation to VSENSE Offset
Voltage
VRCMP with VSENSE+ = 0V
0.8
mV
Feedback Pin Load Compensation Current
VSENSE+ = 20mV, VFB = 1.230V
20
A
UVLO Function
UVLO Pin Threshold (VUVLO)
l
1.215
1.240
1.265
V
UVLO Pin Bias Current
VUVLO = 1.2V
VUVLO = 1.3V
–0.25
–4.50
0.1
–3.4
0.25
–2.50
A
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相關代理商/技術參數(shù)
參數(shù)描述
LTC4278IDKD 制造商:LINER 制造商全稱:Linear Technology 功能描述:IEEE 802.3at PD with Synchronous No-Opto Flyback Controller and 12V Aux Support
LTC4278IDKD#PBF 功能描述:IC PD IEEE 802.3AT 25.5W 32-DFN RoHS:是 類別:集成電路 (IC) >> 接口 - 控制器 系列:- 標準包裝: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 供應商設備封裝:24-HVQFN（4x4） 包裝:托盤 配用:568-3511-ND - DEMO BOARD SPI TO I2C 其它名稱:935286452157SC18IS600IBSSC18IS600IBS-ND
LTC4278IDKD#TRPBF 功能描述:IC PD IEEE 802.3AT 25.5W 32-DFN RoHS:是 類別:集成電路 (IC) >> 接口 - 控制器 系列:- 標準包裝: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 供應商設備封裝:24-HVQFN（4x4） 包裝:托盤 配用:568-3511-ND - DEMO BOARD SPI TO I2C 其它名稱:935286452157SC18IS600IBSSC18IS600IBS-ND
LTC4278IDKDPBF 制造商:LINER 制造商全稱:Linear Technology 功能描述:IEEE 802.3at PD with Synchronous No-Opto Flyback Controller and 12V Aux Support
LTC4278IDKDTRPBF 制造商:LINER 制造商全稱:Linear Technology 功能描述:IEEE 802.3at PD with Synchronous No-Opto Flyback Controller and 12V Aux Support
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