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(shù)資料
型號: MAX5971AETI+
廠商: Maxim Integrated
文件頁數(shù): 19/22頁
文件大?。?/td> 2126K
描述: IC CTRLR PD IEEE 802.3AF 28WQFN
產(chǎn)品培訓(xùn)模塊: Lead (SnPb) Finish for COTS
Obsolescence Mitigation Program
標(biāo)準(zhǔn)包裝: 60
類型: 以太網(wǎng)供電控制器 PD 開關(guān)(PoE)
應(yīng)用: 供電設(shè)備(PSE)
內(nèi)部開關(guān):
電流限制: 可調(diào)
電源電壓: 32 V ~ 60 V
工作溫度: -40°C ~ 85°C
安裝類型: 表面貼裝
封裝/外殼: 28-WFQFN 裸露焊盤
供應(yīng)商設(shè)備封裝: 28-TQFN-EP(5x5)
包裝: 管件
______________________________________________________________________________________ 19
Single-Port, 40W, IEEE 802.3af/802.3at PSE
Controller with Integrated MOSFET
The MAX5971A also contains an internal square wave,
PWM signal generator. The PWM runs at a typical fre-
quency of 25kHz with an approximate typical duty cycle
of 6.25%. PWMEN is used to enable or disable the PWM.
PWMEN is internally pulled up to the digital supply, and
can be left unconnected to enable the internal PWM.
When enabled, the LED pulses are driven by the PWM
to reduce the power dissipation and increase the system
efficiency. Force PWMEN low to disable the internal
PWM; the LED is then driven directly.
Thermal Shutdown
If the MAX5971A die temperature reaches 150NC, an
overtemperature fault is generated and the device shuts
down. The die temperature must cool down below 130NC
to remove the overtemperature fault condition. After a
thermal shutdown condition clears, the device is reset.
  Applications Information
Layout Procedure
Careful PCB layout is critical to achieve high efficiency
and low EMI. Follow these layout guidelines for optimal
performance.
1) Place the input bypass capacitance and the output
bypass capacitor (0.1礔 ceramic capacitor from
AGND to OUTP) as close to the MAX5971A as pos-
sible.
2) Use large SMT component pads for power dissipat-
ing devices such as the MAX5971A and the external
diodes in the high-power path.
3) Use short, wide traces whenever possible for high-
power paths.
4) Use the MAX5971 Evaluation Kit as a design and
layout reference.
5) The exposed pad (EP) must be soldered evenly to the
PCB ground plane for proper operation and power
dissipation. Use multiple vias beneath the exposed
pad for maximum heat dissipation. A 1.0mm to
1.2mm pitch is the recommended spacing for these
vias and they should be plated (1oz copper) with a
small barrel diameter (0.30mm to 0.33mm).
Figure 6. Typical Operating Circuit 1 (DC Load Removal Detection, Internal PWM Enabled for LED Indication, and Class 5
Detection Enabled)
1N4448
1kI
1kI
1nF
-54V
5.1kI
LED
10mH
1N4448
0.1礔
100V
47礔
100V
-54V
LED
AGND
EN
V
EE
V
EE_DIG
LEGACY
MIDSPAN
OSC
OUT
OUTP
DET
ILIM1
ILIM2
PWMEN
MAX5971A
0.1礔
100V
SMJ58A
2.2MI
PSE OUTPUT
相關(guān)PDF資料
PDF描述
MAX5972AETE+T IC CONTROLLER INTERFACE 16TQFN
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
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
MAX5971AETI+ 功能描述:熱插拔功率分布 IEEE 802.3af/at PSE Controller RoHS:否 制造商:Texas Instruments 產(chǎn)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(fēng)格:SMD/SMT 封裝 / 箱體:MSOP-8 封裝:Tube
MAX5971AETI+T 功能描述:熱插拔功率分布 IEEE 802.3af/at PSE Controller RoHS:否 制造商:Texas Instruments 產(chǎn)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(fēng)格:SMD/SMT 封裝 / 箱體:MSOP-8 封裝:Tube
MAX5971AETI+W 制造商:Maxim Integrated Products 功能描述:IEEE802.3 AT PSE SWITCH - Rail/Tube
MAX5971AEVKIT 功能描述:電源管理IC開發(fā)工具 RoHS:否 制造商:Maxim Integrated 產(chǎn)品:Evaluation Kits 類型:Battery Management 工具用于評估:MAX17710GB 輸入電壓: 輸出電壓:1.8 V
MAX5971AEVKIT+ 制造商:Maxim Integrated Products 功能描述:PD INTERFACE CONTROLLER - Boxed Product (Development Kits)
主站蜘蛛池模板: 彭州市| 崇明县| 东城区| 云霄县| 晋宁县| 嵩明县| 阜阳市| 怀宁县| 思南县| 嘉定区| 政和县| 长寿区| 双城市| 保山市| 兴安县| 延安市| 林口县| 定边县| 洛隆县| 大洼县| 扬中市| 信丰县| 东阿县| 沛县| 三门县| 巴林左旗| 金山区| 迁安市| 黔西| 萨嘎县| 绵竹市| 肇庆市| 集贤县| 吐鲁番市| 盈江县| 杨浦区| 泽普县| 杭州市| 南溪县| 郎溪县| 武功县|