參數(shù)資料
型號: MAX5986AETE+
廠商: Maxim Integrated
文件頁數(shù): 17/23頁
文件大?。?/td> 843K
描述: IC POE SWITCH PSE 16TQFN
標準包裝: 60
類型: 以太網(wǎng)供電控制器 PD 開關(PoE)
應用: 供電設備(PSE)
內(nèi)部開關:
電流限制: 201mA
電源電壓: 8.7 V ~ 60 V
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: 管件
MAX5986AMAX5986C/MAX5987A
IEEE 802.3af-Compliant, High-Efficiency, Class 1/
Class 2, PDs with Integrated DC-DC Converter
  17
Maxim Integrated
PCB Layout
Careful PCB layout is critical to achieve clean and stable
operation. It is highly recommended to duplicate the
MAX5986A EV kit layout for optimum performance. If
deviation is necessary, follow these guidelines for good
PCB layout:
1) Connect input and output capacitors to the power
ground plane; connect all other capacitors to the sig-
nal ground plane.
2) Place capacitors on V
DD
, V
CC
, AUX, V
DRV
as close
as possible to the IC and its corresponding pin using
direct traces. Keep power ground plane (connected
to PGND) and signal ground plane (connected to
GND) separate.
3) Keep the high-current paths as short and wide as
possible. Keep the path of switching current short
and minimize the loop area formed by LX, the output
capacitors, and the input capacitors.
4) Connect V
DD
, V
CC
, and PGND separately to a large
copper area to help cool the IC to further improve
efficiency and long-term reliability.
5) Ensure all feedback connections are short and direct.
Place the feedback resistors and compensation com-
ponents as close as possible to the IC.
6) Route high-speed switching nodes, such as LX, away
from sensitive analog areas (FB).
7) Place enough vias in the pad for the EP of the
MAX5986AMAX5986C/MAX5987A so that heat gener-
ated inside can be effectively dissipated by the PCB
copper. The recommended spacing for the vias is 1mm
to 1.2mm pitch. The thermal vias should be plated (1oz
copper) and have a small barrel diameter (0.3mm to
0.33mm).
Table 1. Design Selection Table
OUTPUT
C
IN
C
OUT
L
CLASS
3.3V
CERAMIC
ELECTROLYTIC
CERAMIC
2.2FF/100V
10FF/63V
3x22FF/6.3V
33FH/1.4A
1
5V
2.2FF/100V
10FF/63V
3x22FF/6.3V
47FH/1.6A
1 or 2
12V
2.2FF/100V
10FF/63V
2x10FF/16V
220F/0.8A
1 or 2
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相關代理商/技術參數(shù)
參數(shù)描述
MAX5986AETE+ 功能描述:直流/直流開關轉換器 IEEE802.3 af PD w/ DC/DC Conv RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開關頻率:1.5 MHz 輸出電壓:4.6 V 輸出電流:250 mA 輸出端數(shù)量:2 最大工作溫度:+ 85 C 安裝風格:SMD/SMT
MAX5986AETE+T 功能描述:直流/直流開關轉換器 IEEE802.3 af PD w/ DC/DC Conv RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開關頻率:1.5 MHz 輸出電壓:4.6 V 輸出電流:250 mA 輸出端數(shù)量:2 最大工作溫度:+ 85 C 安裝風格:SMD/SMT
MAX5986BETE+ 功能描述:以太網(wǎng) IC IEEE802.3 AF HI EFFICIENCY PD RoHS:否 制造商:Micrel 產(chǎn)品:Ethernet Switches 收發(fā)器數(shù)量:2 數(shù)據(jù)速率:10 Mb/s, 100 Mb/s 電源電壓-最大:1.25 V, 3.45 V 電源電壓-最小:1.15 V, 3.15 V 最大工作溫度:+ 85 C 封裝 / 箱體:QFN-64 封裝:Tray
MAX5986BETE+T 功能描述:PMIC 解決方案 IEEE802.3 AF HI EFFICIENCY PD RoHS:否 制造商:Texas Instruments 安裝風格:SMD/SMT 封裝 / 箱體:QFN-24 封裝:Reel
MAX5986EVKIT# 功能描述:電源管理IC開發(fā)工具 MAX5986 Eval Kit 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