參數(shù)資料
型號(hào)： SI3452MS8-KIT
廠商： Silicon Laboratories Inc
文件頁(yè)數(shù)： 12/36頁(yè)
文件大?。?/td> 0K
描述： BOARD EVAL FOR SI3452
特色產(chǎn)品： Si3452 Quad High-Voltage Port Controller for PoE and PoE+PSEs
標(biāo)準(zhǔn)包裝： 1
主要目的： 特殊用途 DC/DC，以太網(wǎng)供電（POE）
板類型： 完全填充
已供物品： 板
已用 IC / 零件： Si3452
其它名稱： 336-1836
Si3452
2
Rev. 1.3
Description
When connected directly to the host system or configured in Auto mode, each Si3452 high-voltage port controller
provides all of the critical circuitry and sophisticated power measurement functionality for the high-voltage
interfaces of four complete PSE ports. The Si3452 fully integrates robust, low-RON (0.3 typical) power MOSFET
switches, low-power dissipation current sensing circuitry, and transient voltage surge suppression devices.
The on-chip current sense circuitry and power MOSFETs provide programmable scaling of current limits to match
either PoE (350 mA, 15.4 W), PoE+ (600 mA, 30 W), and extended (800 mA, 40 W) power requirements on a per-
port basis. Designed for use in Endpoint PSE (e.g., Ethernet switches) or Midspan PSE (e.g., inline power
injectors) applications, each Si3452 also performs the IEEE-required powered device (PD) detection, classification,
and disconnect functionality.
The flexible architecture enables powered device disconnect detection using Silicon Laboratories' proprietary dV/dt
disconnect sensing algorithm. dV/dt disconnect is an alternative to dc disconnect that requires no additional BOM
components, does not dissipate extra device power, and fully interoperates with all powered devices. Also provided
are multi-point detection algorithms and per-port current and voltage monitoring.
Intelligent protection circuitry includes power supply undervoltage lockout (UVLO), port output current limiting and
short-circuit protection, thermal overload sensing and port shutdown, and transient voltage surge suppressors
capable of protecting the Si3452 from a variety of harsh surge events seen on the RJ-45 interface.
To maximize system design flexibility and minimize cost, each Si3452 connects directly to a system host controller
through an I2C serial interface, eliminating the need for an external MCU. The Si3452 can be set to one of 12
unique addresses, allowing control of up to 48 ports on a single I2C bus.
Functional Block Diagram
PER PORT ANALOG
AD
2
AD
1
AD
3
HV SPI
&
Port
Control
VEE1
VOUT1
AOUT
Gate Control,
Current Limit
& Foldback
Detection
&
Classification
dV/dt
Disconnect
Channel
Mode
&
Limit
Control
VREF & Central Bias
MEAS
.
MU
X
PGA
DET4
VOUT2
VOUT3
DET3
DET2
G
ND1
2
AG
ND
VDD
VEE3
Thermal
Prot.
RB
IA
S
AD
0
VEE2
VEE4
DET1
VOUT4
Current
Sense
VR
EF
VE
E
DGN
D
AMUX
10b
ADC
Temp
Sensor
AIN
LV SPI
AD
1
AD0
AD
2
AD3
MCU Core
& PSE FSM
256 Byte SRAM
8 kByte EPROM
I2C
RS
T
PLL
Voltage
Regulator
& Monitor
VD
D
AGND
POR
WDT
IN
T
G
ND3
4
RST
SD
A
SCL
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
SI3453 制造商:SILABS 制造商全稱:SILABS 功能描述:QUAD HIGH-VOLTAGE PORT CONTROLLER FOR POE AND POE PSES
Si3453A-B01-GM 功能描述:熱插拔功率分布 Quad PoE PSE Port 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
SI3453A-B01-GMR 功能描述:熱插拔功率分布 Quad PoE PSE Port 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
SI3453A-B02-GM 制造商:Silicon Laboratories Inc 功能描述:QUAD POE PSE PORT CONTROLLER (AUTO, ENDPOINT, DC DISCONNECT) - Trays 制造商:Silicon Laboratories Inc 功能描述:IC POE PSE PORT CTLR QUAD 40QFN
SI3453A-B02-GMR 制造商:Silicon Laboratories Inc 功能描述:QUAD POE PSE PORT CONTROLLER (AUTO, ENDPOINT, DC DISCONNECT) - Tape and Reel 制造商:Silicon Laboratories Inc 功能描述:IC POE PSE PORT CTLR QUAD 40QFN
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