參數(shù)資料
型號(hào)： PD64012
廠商： Electronic Theatre Controls, Inc.
英文描述： 12-channel PoE Manager
中文描述： 12通道供電管理
文件頁(yè)數(shù)： 9/16頁(yè)
文件大?。?/td> 496K
代理商： PD64012
PD64012
12-CHANNEL PoE MANAGER
Vport
Measurem ent
I
class
Reg
PoL
Sequencer
Power Managem ent
I
lim
Reg
Current and AC
Voltage
Measurement
Channel RT
Control Status
Overload /
Disconnect
Recovery
Com
Interface
SPI
I
2
C
Overload
Logic
DC Disconnect
Logic
AC Disconnect
Macro
Classification
Resistor Line
Detection
Real Time
Protection
8-bit
ADC
I
lim
8-bit DAC
I
class
8-bit DAC
Current Lim iting
x12
Clock
Oscillator
VMAIN
Vmain
48+5v
Pum p
Up
POR
Voltage
Regulator
Reset
+ 48V
VPORTPOS
VPORTNEG
PORTSENSE
Vport Level Shifter
Line Detection
x12
AC Disconnect Generator
x12
AC DAC
8-bit
LD DAC
Vport
10-bit
ADC
Sense
Resistor
Classification
Vm ain -17 V
Digital
Analog
MISO
MOSI
SS
SCK
SCL
SDA
DC Disconnect
Com parator
SPI
I
2
C
Com m unication
I/O
Figure 5: Internal Block Diagram
Digital Section
Communication I/O
The PD64012 incorporates two communication interfaces. When operating in the Enhanced mode, an SPI bus
connects the PD63000 MCU to the PD64012s. The second interface is the I
2
C, used in the Automatic mode (with
the host).
Both interfaces are used to communicate the contents of internal registers between the PD64012 logic and the
MCU.
PoE Sequencer
This central block of the Digital section includes a combination of internal state machines (macros). It is fed from
the Overload/Disconnect Recovery circuit and from the Power Management block.
Power Management
Receives data from the Vport Measurement block and receives commands and controls from the Communication
Interface. This, in order to control the power allocated to the system, as defined by the host. Power Management
receives requests to enable ports and decides, by communicating with the Sequencer, whether power is to be
allocated.
Overload /Disconnect Recovery
There is a number of macros which decide on port enable and some on port disconnect.
Port enabling
: Classification, Resistor Line Detection and Vport Measurement.
Port disable
: AC Disconnect, DC Disconnect and Overload Logic. These macros are connected to the Channel RT
Control Status block. Based on the inputs from these macros, the Channel RT controller starts the shutdown
operation or the recovery process. This is done according to preprogrammed parameters for different time
windows, as shown in Figure 2, Power Limits.
www.powerdsine.com
06-0003-058 (Rev. 2.8) / 5 August 2004
PowerDsine 2003
Information in this document subject
to change without prior notice.
9
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