STHS2375LM6E datasheet, PDF - EEWORLD Datasheet

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STHS2375LM6E: DescriptionIEEE 802.3af PoE Powered Device (PD) interface controller; CategoryPower/power management The power supply circuit; File Size188KB，20 Pages; ManufacturerSTMicroelectronics; Websitehttp://www.st.com/; Environmental Compliance

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STHS2375LM6E Overview

IEEE 802.3af PoE Powered Device (PD) interface controller

STHS2375LM6E Parametric

Parameter Name	Attribute value
Is it Rohs certified?	conform to
Maker	STMicroelectronics
Parts packaging code	SOIC
package instruction	SOP, SOP8,.25
Contacts	8
Reach Compliance Code	unknow
ECCN code	EAR99
Adjustable threshold	YES
Analog Integrated Circuits - Other Types	POWER SUPPLY SUPPORT CIRCUIT
JESD-30 code	R-PDSO-G8
length	4.8 mm
Number of channels	1
Number of functions	1
Number of terminals	8
Maximum operating temperature	85 °C
Minimum operating temperature	-40 °C
Package body material	PLASTIC/EPOXY
encapsulated code	SOP
Encapsulate equivalent code	SOP8,.25
Package shape	RECTANGULAR
Package form	SMALL OUTLINE
Peak Reflow Temperature (Celsius)	NOT SPECIFIED
power supply	48 V
Certification status	Not Qualified
Maximum seat height	1.75 mm
Maximum supply current (Isup)	0.45 mA
Maximum supply voltage (Vsup)	57 V
Minimum supply voltage (Vsup)
Nominal supply voltage (Vsup)	48 V
surface mount	YES
Temperature level	INDUSTRIAL
Terminal form	GULL WING
Terminal pitch	1.27 mm
Terminal location	DUAL
Maximum time at peak reflow temperature	NOT SPECIFIED
width	3.8 mm

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STHS2375A, STHS2375L, STHS2376A,

STHS2376L, STHS2377A, STHS2377L

IEEE 802.3af PoE Powered Device (PD) interface controller

Features

■

IEEE 802.3af-compliant interface for Powered

Devices (PDs)

Integrated 100V, 500mA power MOSFET

Resistor-programmable inrush current limit

Normal operation current limit 460mA

External 25kΩ signature resistor

Resistor-programmable classification current

(Class 0-4)

Power Good output (active-high), open drain

Undervoltage Lockout (UVLO) - standard,

programmable, and legacy (see

Table 1)

Thermal overload protection

Latch (L) or auto-retry (A) after hard current

overload or repetitive thermal overload

Industrial temperature range: –40 to +85°C

8-pin SO and 8-pin TSSOP packages

RoHS compliant

Device options

External

signature

resistor (1%)

24.9kΩ

SO8 (M)

TSSOP8 (DW)

Applications

■

Voice over IP (VOIP) phones

Web cameras

WLAN access points

Table 1.

Order code

STHS2375A

STHS2375L

STHS2376A

STHS2376L

STHS2377A

STHS2377L

-O

UVLO

Standard

Programmable

Legacy

Internet appliances

POS terminals

RFID readers

UVLO

threshold,

rising (V)

39.3

2.49

35.1

UVLO

threshold,

falling (V)

30.5

1.93

30.5

Protection

mode

Auto

Latch

Auto

Latch

Auto

Latch

24.9kΩ

July 2007

Rev 4

1/20

www.st.com

STHS237x

Summary description

The STHS237x is an IEEE802.3af-compliant family of interface controllers for Power over

Ethernet (PoE) Powered Device (PD) applications. The devices consist of two main

sections:

●

The IEEE802.3af interface to the PoE powered RJ-45 wall socket, and

the Hot Swap Controller (HSC) functions required to protect the PD during insertion,

operation, and withdrawal from the RJ-45 socket.

These devices have an integrated high voltage power MOSFET (low-side switch) with low

DS ON

and the capability to accept transients as high as 100V. Since the pins (such as V

and V

) which interface to the RJ-45 socket can routinely see high peak voltages in excess

of 100V, it is strongly recommended that board designers protect the PD device with a

transient voltage suppressor, such as the SMAJ58A (available from STMicroelectronics),

connected between the V

and V

pins (see

Figure 4 on page 8).

The IEEE802.3af-compliant interface includes the basic PD Detection and Classification

functions, whereas the 'Hot Swap' functions include other basic features, such as Inrush

Current Limiting, Undervoltage Lockout (UVLO), and Thermal Overload Protection. All of the

devices include an open drain Power Good (PG) signal to indicate normal steady operation

(see

Figure 1 on page 6

and

Table 2 on page 6).

The STHS237x family also incorporates a

voltage offset (two series diodes) to accommodate the input diode bridge used to make the

PD polarity insensitive.

The STHS237x family comprises devices for all the UVLO limits configurations: IEEE

standard compliant (STHS2375), programmable (STHS2376) and for legacy systems

(STHS2377). See

Table 1 on page 1.

Each of the basic part types, the STHS2375, STHS2376 and the STHS2377, is available

either with Latched Operation (L) Mode or with Automatic Retry (A) Mode after fault

conditions. For product options overview see

Table 1 on page 1.

-O

5/20

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