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STE12PS PDF даташит

Спецификация STE12PS изготовлена ​​​​«Silicon Tech» и имеет функцию, называемую «12-Channel Integrated PSE Line Manager».

Детали детали

Номер произв STE12PS
Описание 12-Channel Integrated PSE Line Manager
Производители Silicon Tech
логотип Silicon Tech логотип 

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STE12PS Даташит, Описание, Даташиты
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STE12PS
12 channel integrated PSE line manager
Preliminary Data
Features
PSE power control device
Supports up to 12 independent or four 30W,
“boosted” ports
Wide operating range: up to 90V
IEEE 802.3af compliant
Open circuit detection: AC and DC methods
Advanced power management algorithm
Current sensing with as low as 500mΩ,
external, series resistors
No need for external FETs
In-rush current control
Short-circuit protection
Adaptable signature detection capability
On-chip 3.3V SMPS controller
Low-noise, 12-bit ADC
Standard I2C interface
Parallel monitor interface
Description
STE12PS is designed to supply power over
multiple Ethernet channels in order to avoid
different, individual power supply units for
applications such as Web cams, IP Phones,
Bluetooth access points and WLAN access
points.
The equipment that provides the power to the
twisted pair cabling is referred to as Power
Sourcing Equipment (PSE).
The PSE’s main functions are: looking for links to
a Powered Device (PD), classifying a PD,
supplying power to the link, monitoring power on
the link, and removing power from the link.
PBGA23x23
The STE12PS is fully programmable, supporting
the detection and powering of IEEE802.3af as
well as legacy PDs. The flexibility of the STE12PS
allows the user to select a suitable system
configuration: up to 12 ports as well as 4
“boosted” channels. If needed, the STE12PS can
also efficiently manage cases or applications
where a limited amount of power is available to
the ports (smart-power capability) by means of
integrated, power MOSFET devices. All
operations are controlled via the I2C bus also
notifying externally some ports status condition
via dedicated pins.
Ethernet port isolation can be easily maintained
thanks to an integrated 3.3V SMPS power source
and by means of optocouplers.
The STE12PS has five address selection inputs
to choose up to 32 possible different addresses.
Power can be provided to the PD using either
spare lines of the Ethernet cable or using the data
wires, as specified by IEEE 802.3af.
November 2006
Rev 1
This is preliminary information on a new product now in development or undergoing evaluation. Details are subject to
change without notice.
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Contents
STE12PS
Contents
1 Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
2 Pin description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
3 Functional description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
3.1 Operating modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
3.2 Detection and classification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
3.2.1 Detection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
3.2.2 Classification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
3.2.3 Detection and classification FSM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
3.3 Power ON . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
3.3.1 Under load (disconnection) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
3.3.2 Short circuit, overload and overcurrent . . . . . . . . . . . . . . . . . . . . . . . . . 15
3.3.3 Thermal monitoring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
3.4 Internal 3.3V/10V generator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
3.5 Logic interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
3.6 6MHz clock generator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
3.7 Smart-power mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
3.8 Power boost mode - 30W . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
3.9 Measurement and parameter codings . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
4 I2C interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
5 I2C slave protocol overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
5.1 Functional description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
5.2 Error cases . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
5.3 Interrupts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
5.4 I2C device address . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
5.5 Register addressing: write command format . . . . . . . . . . . . . . . . . . . . . . 28
5.6 Register addressing: read command format . . . . . . . . . . . . . . . . . . . . . . 29
5.7 Parallel monitoring interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
6 Electrical specifications and timings . . . . . . . . . . . . . . . . . . . . . . . . . . 31
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STE12PS Даташит, Описание, Даташиты
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STE12PS
Contents
7 Ball coordinates . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
8 Package information - mechanical data . . . . . . . . . . . . . . . . . . . . . . . . 41
9 Ordering information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
10 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
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Номер в каталогеОписаниеПроизводители
STE12PS12-Channel Integrated PSE Line ManagerSilicon Tech
Silicon Tech

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