STHS2377AM6E STMicroelectronics, STHS2377AM6E Datasheet - Page 7

• Manufacturer Part Number: STHS2377AM6E
• Description: Hot Swap & Power Distribution IEEE 802.3af PD Interface
• Manufacturer: STMicroelectronics

Specifications of STHS2377AM6E

• Product: Controllers & Switches
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

1.1
1.1.1
1.1.2
1.1.3
1.1.4
1.1.5
1.1.6
1.1.7
1.1.8
Pin descriptions
Current limit (I
Connect a resistor between I
I
R
open or connect to V
Classification (CLASS)
Connect a Classification resistor between this pin and V
will be connected. Do not connect this pin directly to V
For classification resistor values, see
Detection resistor (DET)
Connect a 24.9k resistor between DET and V
Device properly.
Ground (V
This is the return power line on the PSE side (negative).
Return (RTN)
This is the return power output on the load side, negative rail.
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).
Undervoltage Lockout Input (UVLO, STHS2376A/L only)
Connect the tap of the resistor divider between V
(see
Note: STHS2376A/L only, for all other devices, this is No Connect.
Power supply (V
This is the Power Input/Output, positive rail.
LIM
ILIM
= 25 000/R
Figure 6 on page
= 178k
SS
for inrush current of 140mA for compatibility with legacy PSEs. Do not leave
ILIM
)
LIM
[A]. Practical values of R
SS
DD
)
10).
.
)
LIM
and V
Table 3 on page
SS
to set the start-up inrush current limit.
ILIM
DD
are between 62.5k
DD
to allow the PSE to detect the Powered
and V
SS
8.
SS
.
to tell the PSE which power class
SS
to set the UVLO voltage limits
and 500k .
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