EVALUATION KIT AVAILABLE
Click here for production status of specific part numbers.
MAX5995A/B/C
IEEE 802.3bt-Compliant, Powered Device
Interface Controllers with Integrated 91W
High-Power MOSFET
General Description
Applications
The MAX5995A/MAX5995B/MAX5995C provide a com-
plete interface for a powered device (PD) to comply with
the IEEE 802.3af/at/bt standard in a Power-Over-Ether-
● IEEE 802.3bt Powered Devices
● VOIP Phones, IP Security Cameras
● Wireless Access Point
● Small Cell, Pico Cell
● Lighting
● Building Automation
®
net (PoE) system. The devices provide the PD with a de-
tection signature, classification signature, and an integrat-
ed isolation power switch with startup inrush current con-
trol. During the startup period, the devices limit the current
to 135mA (typ) before switching to the higher current limit
(1800mA to 2400mA, typ) when the isolation power MOS-
FET is fully enhanced. The devices feature Multi-Event
classification, Intelligent MPS (MAX5995B/MAX5995C),
Autoclass (MAX5995C), and an input UVLO with wide
hysteresis and long deglitch time to compensate for twist-
ed-pair cable resistive drop and to assure glitch-free tran-
sition during power-on/-off conditions. The devices can
withstand a maximum voltage of 100V at the input.
Benefits and Features
● IEEE 802.3af/at/bt Compliant
● Type 1~4 PSE Classification Indicator or an External
Wall Adapter Indicator Output
● Simplified Wall Adapter Interface
● Multi-Event Classification 0–8
● Intelligent MPS (MAX5995B/MAX5995C, Patent
US9152161)
● Sleep Mode and Ultra-Low-Power Sleep Mode
(MAX5995A/MAX5995B)
● 100V Input Absolute Maximum Rating
● Inrush Current Limit During Startup
● Current Limit During Normal Operation
● Current Foldback Protection
The devices support a Multi-Event classification method,
as specified in the IEEE 802.3bt standard, and provide a
signal to indicate from Type 1 to Type 4 Power Sourcing
Equipment (PSE). The devices can detect the presence
of a wall adapter power source connection and allow a
smooth switch-over from the PoE power source to the wall
power adapter.
● Undervoltage Lockout at 36V
● LED Driver with Programmable LED Current
(MAX5995A/MAX5995B)
The devices also provide a power-good (PG) signal, two-
step current limit and foldback control, overtemperature
protection. A sleep mode feature in the MAX5995A/
MAX5995B minimizes low power consumption while gen-
erating the Maintain Power Signature (MPS) to maintain
PSE connection. An Ultra-Low-Power sleep mode feature
in the MAX5995A/MAX5995B further reduces power con-
sumption while still generating MPS current. The
MAX5995B/MAX5995C provides Intelligent Maintain Pow-
er Signature (IMPS) feature to automatically enable MPS
current by detecting the port current. The devices feature
a LED driver that is activated during sleep mode, Ultra-
Low-Power sleep mode (MAX5995A/MAX5995B), and In-
telligent MPS mode (MAX5995B/MAX5995C). Multi-Event
indication feature provides patterned signals to indicate
power level allocated from PSE to PD in 5 different sce-
narios. The MAX5995C provides Autoclass feature to en-
able advanced applications that allow the PSE to effec-
tively optimize power allocation to PD.
● Overtemperature Protection
● Multi-Event Power Level Indication
● Autoclass Feature (MAX5995C)
● Thermally Enhanced, 5mm x 5mm, 16-Pin TQFN
The MAX5995A/MAX5995B/MAX5995C are available in a
16-pin, 5mm x 5mm, TQFN power package. These de-
vices are rated over the -40°C to 125°C (MAX5995AATE/
BATE/CATE) and -40°C to 85°C (MAX5995AETE/BETE/
CETE) temperature ranges.
19-100401; Rev 3; 7/19
5秒后页面跳转
AO3401场效应管参数、引脚图、应用原理图
BT131可控硅参数及引脚图、工作原理详解
74LS32芯片参数、引脚图及功能真值表
全球首块英伟达H200交付 黄仁勋“送货上门”
微信公众号
抖音公众号
浙公网安备 33010502006866号 浙ICP备10014259号-119
营业执照ICP证
数据手册
如果您发现信息不准确，
