TPS2370DR ,IEEE802.3af Power Interface Switch For Power-Over-Ethernet (PoE) Powered Devices (PD's)FEATURES DESCRIPTION Integrated Power Interface Switch for IEEEActing as an interface between the ..
TPS2370PW ,IEEE802.3af Power Interface Switch For Power-Over-Ethernet (PoE) Powered Devices (PD's)maximum ratings” may cause permanent damage to the device. These are stress ratings only,and functi ..
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TS831-5I ,MICROPOWER VOLTAGE SUPERVISOR RESET ACTIVE LOWELECTRICAL CHARACTERISTICS Tamb = 25°C (unless otherwise specified)Symbol Parameter Min. Typ. Max. ..
TS831-5IDT ,MICROPOWER VOLTAGE SUPERVISOR RESET ACTIVE LOWELECTRICAL CHARACTERISTICS Tamb = 25°C (unless otherwise specified) Symbol Parameter Min. Typ. M ..
TS831-5IPT ,MICROPOWER VOLTAGE SUPERVISOR RESET ACTIVE LOWTS831MICROPOWER VOLTAGE SUPERVISORRESET ACTIVE LOW ■ ULTRA LOW POWER CONSUMPTION : 12μA ma ..
TS831-5IZ-AP ,MICROPOWER VOLTAGE SUPERVISOR RESET ACTIVE LOWTS831MICROPOWER VOLTAGE SUPERVISORRESET ACTIVE LOW ■ ULTRA LOW POWER CONSUMPTION : 12μA ma ..
TS831-5IZT ,MICROPOWER VOLTAGE SUPERVISOR RESET ACTIVE LOWELECTRICAL CHARACTERISTICS Tamb = 25°C (unless otherwise specified) Symbol Parameter Min. Typ. M ..
TS834-5I ,MICROPOWER VOLTAGE SUPERVISOR RESET ACTIVE LOW OR HIGH WITH INTEGRATED TIMERTS834 MICROPOWER VOLTAGE SUPERVISORRESET ACTIVE LOW OR HIGH WITH INTEGRATED TIMER.ULTRA LOW POWER ..
TPS2370DR-TPS2370PW-TPS2370PWR
Hot Swap Switch for Power-Over-Ethernet (POE) Powered Devices (PD's)
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SLUS537C − AUGUST 2002 − REVISED MARCH 2004
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FEATURES Integrated Power Interface Switch for IEEE
802.3af Powered Devices (PDs) Provides PD Detection Signature Provides PD Classification Signature
(Class 0−4) Programmable Inrush Current Limit Internal 0.3-Ω Low-Side FET Interfaces to DC/DC Soft-Start for DC/DC
Enable Internal Thermal Protection – Disconnects PD
Load Minimal External Parts Count 8-Pin SOIC, 8-Pin TSSOP Packages
APPLICATIONS VoIP Phones Internet Appliances Wireless LAN Access Points Bluetooth Access Points
DESCRIPTIONActing as an interface between the power sourcing
equipment (PSE) and the powered device (PD), the
TPS2370 performs all detection, classification, inrush
current limiting, and switch FET control that is
necessary for compliance with the IEEE 802.3af
Standard. An internal 0.3-Ω FET provides maximum
power delivery. As an additional feature, the TPS2370
interfaces with the enable/soft-start signal of a dc-to-dc
converter, eliminating the need to have an accurate
UVLO in the dc-to-dc converter.
At low input voltages (1.8 V to 10 V), the TPS2370
draws less than 12 µA, allowing accurate sensing of the
external 24.9-kΩ discovery resistor. At input voltages
between 15 V and 20 V, an external resistor sets the
level of current to be drawn during classification mode.
TPS2370 is compatible with current as well as voltage
measurement schemes for classification. Above 20-V
input, the classification current is shut off, reducing
internal power dissipation.
The TPS2370 drives an internal low-side FET for
control of the return side of the power path. The internal
FET is turned on when the input voltage reaches 40 V
and above. When the input voltage decreases, the FET
remains on until the input voltage drops to below 30 V.
TYPICAL APPLICATION
SMAJ54A
RLIM
RCLASSUDG−03057
0.1 �f
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