HV110 Datasheet, PDF (1/12 Pages) Supertex, Inc – Power-over-Ethernet Interface PD Controller meets IEEE802.3afTM Standard

HV110
Initial Release
Power-over-Ethernet Interface PD Controller
meets IEEE802.3af^TM Standard
Features
Implements IEEE802.3af Standard for PD
400mA Inrush Current Limit
350mA Operating Current
400mA Fault Current Limit
Fast Response Current Limit when Over Current
or Step Voltage at Input Supply
Programmable UVLO/ENABLE pin
9 seconds Auto Restart
Built in Thermal Shutdown with Hysteresis
90V Open Drain PWRGD (active low) output.
Optional Turn on Timeout Disable
On Board 90V, 1Ω MOSFET
Input Voltage Surge ratings up to 90V
IOL Tested
Applications
IP Phones
Wireless Access Points
End-Spans and Mid-Spans
PoE Routers, Switches
Chargers
Security Peripherals & Cameras
Description
HV110 provides complete power management and
protection for Powered Devices (PDs) utilizing the
IEEE802.3af protocol. As the most complete PD
Power Manager available, HV110 features a 400mA
inrush limit and fault current limit, as well as
minimum current shutdown to ensure additional
protection and reliability to expensive equipments
connected to the PD switch. The internal power
switch uses scaled current-mirror technology which
eliminates the need for an external sense resistor
and provides highly accurate current sensing at the
high and low end operating conditions.
HV110 uses rugged high voltage junction isolated
process, which eliminates the need for any external
high voltage protection devices at the input of these
controllers. Circuit isolation also reduces the chance
of tripping on system noise. A 90V open drain
PWRGD pin provides status information and can be
used to enable the DC/DC power supplies.
HV110 is available in a thermally rugged DPAK-5
package that provides improved thermal resistance
when compared to SO-8 based solutions.
Typical Application
Figure 1. Typical Application Circuit
A061104
Supertex, Inc. • 1235 Bordeaux Drive, Sunnyvale, CA 94089 • Tel: [phone] • FAX: [phone] • www.supertex.com