欧美成人免费电影,国产欧美一区二区三区精品酒店,精品国产a毛片,色网在线免费观看

參數資料
型號: MAX5972AETE+T
廠商: Maxim Integrated
文件頁數: 8/13頁
文件大小: 1120K
描述: IC CONTROLLER INTERFACE 16TQFN
產品培訓模塊: Lead (SnPb) Finish for COTS
Obsolescence Mitigation Program
標準包裝: 2,500
類型: 以太網供電開關(PoE)
應用: IP 電話,LAN 網絡供電,網絡路由器和交換機
內部開關:
電流限制: 可調
工作溫度: -40°C ~ 85°C
安裝類型: 表面貼裝
封裝/外殼: 16-WQFN 裸露焊盤
供應商設備封裝: 16-TQFN-EP(5x5)
包裝: 帶卷 (TR)
IEEE 802.3af/at-Compliant, Powered Device Interface
Controller with Integrated Power MOSFET
8 ______________________________________________________________________________________
  Typical Operating Circuit
  Detailed Description
Operating Modes
Depending on the input voltage (V
IN
= V
DD
 - V
SS
), the
MAX5972A operates in four different modes: PD detec-
tion, PD classification, mark event, and PD power. The
device enters PD detection mode when the input voltage
is between 1.4V and 10.1V. The device enters PD clas-
sification mode when the input voltage is between 12.6V
and 20V. The device enters PD power mode once the
input voltage exceeds V
ON
.
Detection Mode (1.4V d V
IN
 d 10.1V)
In detection mode, the power source equipment (PSE)
applies two voltages on V
IN
 in the range of 1.4V to 10.1V
(1V step minimum) and then records the current measure-
ments at the two points. The PSE then computes DV/DI
to ensure the presence of the 24.9k?signature resistor.
Connect the signature resistor (R
DET
) from V
DD
 to DET for
proper signature detection. The MAX5972A pulls DET low
in detection mode. DET goes high impedance when the
input voltage exceeds 12.5V. In detection mode, most of
the MAX5972A internal circuitry is off and the offset cur-
rent is less than 10礎.
If the voltage applied to the PD is reversed, install pro-
tection diodes at the input terminal to prevent internal
damage to the MAX5972A (see the Typical Application
Circuit). Since the PSE uses a slope technique (DV/DI) to
calculate the signature resistance, the DC offset due to
the protection diodes is subtracted and does not affect
the detection process.
Classification Mode (12.6V d V
IN
 d 20V)
In the classification mode, the PSE classifies the PD
based on the power consumption required by the PD. This
allows the PSE to efficiently manage power distribution.
Class 0 to 5 is defined as shown in Table 1. (The IEEE
802.3af/at standard defines only Class 0 to 4 and Class 5
for any special requirement.) An external resistor (R
CLS
)
connected from CLS to V
SS
 sets the classification current.
2-EVENT
CLASSIFICATION
DETECTION
-54V
MAX5972A
V
DD
RTN
WAD
PG
2EC/WAD
2EC
24V/48V
BATTERY
1.5mA
68nF
RJ-45
AND
BRIDGE
RECTIFIER
GND
SMAJ58A
R
DET
24.9kI
R
CLS
V
SS
DET
CLS
ENABLE
DC-DC
CONVERTER
IN+
IN-
GND
相關PDF資料
PDF描述
MAX5978ETJ+ IC CTLR HOT-SWAP 32TQFN
MAX5981BETE+ IC CTRLR PD IEEE 802.3AF 16TQFN
MAX5986AETE+ IC POE SWITCH PSE 16TQFN
MAX6509CAZK/V+T IC TEMP SWITCH RES-PROG 5TSOT
MAX6513TT075+T IC TEMP SWITCH REMOTE 6-TDFN
相關代理商/技術參數
參數描述
MAX5972AEVKIT 制造商:Maxim Integrated Products 功能描述:IEEE 802.3AF/AT-COMPLIANT POWERED DEVICE INTERFACE CONTROLLE - Boxed Product (Development Kits)
MAX5972BETE+ 功能描述:熱插拔功率分布 IEEE 802.3af/at PDIC Controller RoHS:否 制造商:Texas Instruments 產品:Controllers & Switches 電流限制: 電源電壓-最大:7 V 電源電壓-最小:- 0.3 V 工作溫度范圍: 功率耗散: 安裝風格:SMD/SMT 封裝 / 箱體:MSOP-8 封裝:Tube
MAX5972BETE+T 功能描述:熱插拔功率分布 IEEE 802.3af/at PDIC Controller RoHS:否 制造商:Texas Instruments 產品:Controllers & Switches 電流限制: 電源電壓-最大:7 V 電源電壓-最小:- 0.3 V 工作溫度范圍: 功率耗散: 安裝風格:SMD/SMT 封裝 / 箱體:MSOP-8 封裝:Tube
MAX5973BETL+ 功能描述:監控電路 Phase Redundancy Power Supervisor RoHS:否 制造商:STMicroelectronics 監測電壓數: 監測電壓: 欠電壓閾值: 過電壓閾值: 輸出類型:Active Low, Open Drain 人工復位:Resettable 監視器:No Watchdog 電池備用開關:No Backup 上電復位延遲(典型值):10 s 電源電壓-最大:5.5 V 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:UDFN-6 封裝:Reel
MAX5973BETL+T 功能描述:監控電路 Phase Redundancy Power Supervisor RoHS:否 制造商:STMicroelectronics 監測電壓數: 監測電壓: 欠電壓閾值: 過電壓閾值: 輸出類型:Active Low, Open Drain 人工復位:Resettable 監視器:No Watchdog 電池備用開關:No Backup 上電復位延遲(典型值):10 s 電源電壓-最大:5.5 V 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:UDFN-6 封裝:Reel
主站蜘蛛池模板: 咸宁市| 宁城县| 鄂州市| 清流县| 阳东县| 安岳县| 乐山市| 通榆县| 瑞金市| 禹城市| 乐山市| 罗源县| 丘北县| 石景山区| 樟树市| 高碑店市| 霍邱县| 慈利县| 铁岭市| 泾源县| 唐山市| 元江| 新郑市| 开鲁县| 江孜县| 阳谷县| 桃园县| 图片| 田阳县| 余庆县| 儋州市| 绍兴市| 望奎县| 三明市| 牡丹江市| 雅江县| 霞浦县| 多伦县| 行唐县| 阳东县| 盱眙县|