收藏本站
IEEE 802.3af/at-Compliant, Powered Device Interface
Controllers with Integrated 70W High-Power MOSFET
Applications Information
Operation with 12V Adapter
Layout Procedure
Careful PCB layout is critical to achieve high efficiency
and low EMI. Follow these layout guidelines for optimum
performance:
1) Place the input capacitor, classification resistor, and
transient voltage suppressor as close as possible to
the MAX5982A/MAX5982B/MAX5982C.
2) Use large SMT component pads for power dissipat-
ing devices such as the MAX5982A/MAX5982B/
MAX5982C and the external diodes.
3) Use short and wide traces for high-power paths.
4) Place enough vias in the pad for the EP of the
MAX5982A/MAX5982B/MAX5982C so that heat gen-
erated 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).
2-EVENT
CLASSIFICATION
(ASSERTED ON)
GND
RJ-45
AND
BRIDGE
RECTIFIER
R DET
24.9k I
V DD
2EC/WAD
2EC
PG
IN+
ENABLE
GND
SMAJ58A
68nF
DET
CLS
MAX5982A
MAX5982B
MAX5982C
I.5mA
WAD
12V
DC-DC
CONVERTER
R CLS
BATTERY
-54V
V SS
RTN
IN-
THIS CIRCUIT ACHIEVES
PROPER 2EC LOGIC WHEN
BATTERY IS < 12.5V
WALK MODE
INPUT
WK
MAX5982A/MAX5982B ONLY
SL
1k I
60.4k I
ISOLATED SLEEP
MODE INPUT
ULP
-54V
LED
ULTRA-LOW-POWER
SLEEP
-54V
Figure 2. Typical Configuration When Using a 12V Wall Power Adapter
-54V
14
_____________________________________________________________________________________
发布紧急采购，3分钟左右您将得到回复。

采购需求

(若只采购一条型号，填写一行即可)

发布成功！您可以继续发布采购。也可以进入我的后台，查看报价

发布成功！您可以继续发布采购。也可以进入我的后台，查看报价

*型号 *数量 厂商 批号 封装
添加更多采购

我的联系方式

*
*
*
相关PDF资料
MAX6397SATA+T IC SW OVERVOLT PROT 8-TDFN
MAX6496EVKIT+ KIT EVAL FOR MAX6496
MAX6651EVKIT EVAL KIT FOR MAX6651
MAX7325EVKIT+ KIT EVAL FOR MAX7325
MAX7326EVKIT+ KIT EVAL FOR MAX7326
MAX7359EVKIT+ KIT EVAL FOR MAX7359
MAX7443EVKIT+ KIT EVAL FOR MAX7443
MAX7453EVKIT+ KIT EVAL FOR MAX7453
相关代理商/技术参数
MAX5983AETE+ 功能描述:热插拔功率分布 IEEE 802.3af/at Compliant PDIC RoHS:否 制造商:Texas Instruments 产品:Controllers & Switches 电流限制: 电源电压-最大:7 V 电源电压-最小:- 0.3 V 工作温度范围: 功率耗散: 安装风格:SMD/SMT 封装 / 箱体:MSOP-8 封装:Tube
MAX5983AETE+T 功能描述:热插拔功率分布 IEEE 802.3af/at Compliant PDIC RoHS:否 制造商:Texas Instruments 产品:Controllers & Switches 电流限制: 电源电压-最大:7 V 电源电压-最小:- 0.3 V 工作温度范围: 功率耗散: 安装风格:SMD/SMT 封装 / 箱体:MSOP-8 封装:Tube
MAX5983BETE+ 功能描述:热插拔功率分布 IEEE 802.3af/at Compliant PDIC RoHS:否 制造商:Texas Instruments 产品:Controllers & Switches 电流限制: 电源电压-最大:7 V 电源电压-最小:- 0.3 V 工作温度范围: 功率耗散: 安装风格:SMD/SMT 封装 / 箱体:MSOP-8 封装:Tube
MAX5983BETE+T 功能描述:热插拔功率分布 IEEE 802.3af/at Compliant PDIC RoHS:否 制造商:Texas Instruments 产品:Controllers & Switches 电流限制: 电源电压-最大:7 V 电源电压-最小:- 0.3 V 工作温度范围: 功率耗散: 安装风格:SMD/SMT 封装 / 箱体:MSOP-8 封装:Tube
MAX5984AETI+ 功能描述:其他电源管理 1Port 40W IEEE 802.3 af/at PSE Controller RoHS:否 制造商:Texas Instruments 输出电压范围: 输出电流:4 mA 输入电压范围:3 V to 3.6 V 输入电流: 功率耗散: 工作温度范围:- 40 C to + 110 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-48 封装:Reel
MAX5984AETI+T 功能描述:其他电源管理 1Port 40W IEEE 802.3 af/at PSE Controller RoHS:否 制造商:Texas Instruments 输出电压范围: 输出电流:4 mA 输入电压范围:3 V to 3.6 V 输入电流: 功率耗散: 工作温度范围:- 40 C to + 110 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-48 封装:Reel
MAX5984BETI+ 制造商:Maxim Integrated Products 功能描述:SINGLE-PORT 40W IEEE 802.3AF/AT PSE CONTROLLER WITH INTEGRAT - Rail/Tube
MAX5984CETI+ 制造商:Maxim Integrated Products 功能描述:SINGLE-PORT 40W IEEE 802.3AF/AT PSE CONTROLLER WITH INTEGRAT - Rail/Tube