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參數(shù)資料
| 型號(hào)： | STHS2376L |
| 廠商： | 意法半導(dǎo)體 |
| 英文描述： | IEEE 802.3af PoE Powered Device (PD) Interface Controller(IEEE802.3af PoE PD(受電設(shè)備)接口控制器) |
| 中文描述： | IEEE 802.3af標(biāo)準(zhǔn)的PoE供電設(shè)備（PD）接口控制器（IEEE802.3af標(biāo)準(zhǔn)的PoE（私隱受電設(shè)備）接口控制器） |
| 文件頁(yè)數(shù)： | 7/20頁(yè) |
| 文件大?。?/td> | 187K |
| 代理商： | STHS2376L |
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STHS237x
Summary description
7/20
1.1
Pin descriptions
1.1.1
Current limit (I
LIM
)
Connect a resistor between I
LIM
and V
SS
to set the start-up inrush current limit.
I
LIM
= 25 000/R
ILIM
[A
]
. Practical values of R
ILIM
are between 62.5k
Ω
and 500k
Ω
.
R
ILIM
= 178k
Ω
for inrush current of 140mA for compatibility with legacy PSEs. Do not leave
open or connect to V
SS
.
1.1.2
Classification (CLASS)
Connect a Classification resistor between this pin and V
SS
to tell the PSE which power class
will be connected. Do not connect this pin directly to V
SS
.
For classification resistor values, see
Table 3 on page 8
.
1.1.3
Detection resistor (DET)
Connect a 24.9k
Ω
resistor between DET and V
DD
to allow the PSE to detect the Powered
Device properly.
1.1.4
Ground (V
SS
)
This is the return power line on the PSE side (negative).
1.1.5
Return (RTN)
This is the return power output on the load side, negative rail.
1.1.6
Power Good output (PG)
This pin indicates that the STHS power MOSFET is fully on and works in normal operation
mode (Power Good). Open drain, high impedance means that the power is good; in all other
cases, the impedance is low (referenced to RTN).
1.1.7
Undervoltage Lockout Input (UVLO, STHS2376A/L only)
Connect the tap of the resistor divider between V
DD
and V
SS
to set the UVLO voltage limits
(see
Figure 6 on page 10
).
Note:
STHS2376A/L only, for all other devices, this is No Connect.
1.1.8
Power supply (V
DD
)
This is the Power Input/Output, positive rail.
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