AS1854 Datasheet, PDF (1/52 Pages) List of Unclassifed Manufacturers – Digital Power PoE PD Controllers

AS1854/44/34/24 — Digital Power PoE PD Controllers
with HV Isolation and Quad DC-DC Outputs
GENERAL DESCRIPTION
The AS18x4 product family integrates Akros GreenEdge™ Isolation
technology with next generation Power-over-Ethernet (PoE) PD and
power conversion technology to deliver groundbreaking power
integration, and enable a new range of Digital Power PoE PD
capabilities and solutions.
A Type 1 (IEEE^® 802.3af) and Type 2 (IEEE^® 802.3at) compliant PD
is integrated with high-voltage isolation and quad-output digital
power DC-DC converters – resulting in a complete PoE & Power
management solution in a single device with minimal external
components.
In addition to enabling digital PoE power conversion, Akros
GreenEdge™ isolation enables direct digital management of both
isolated Primary power and Secondary system power for real time
end-to-end Green Power application capabilities.
TYPICAL APPLICATIONS
Voice-over-IP (VoIP) phones
Wireless LAN & WiMAX access points (WAP)
Pan, Tilt, Zoom (PTZ) Cameras, IP cameras
Thin-client and notebook computers
Fiber-to-the-home (FTTH) terminals
Point-of-sale (PoS) terminals, RFID readers
ORDERING INFORMATION
The AS18x4 family includes four pin-compatible devices, all available
in 64-lead QFN Reduction of Hazardous Substance (RoHS)
compliant packages.
Part #
Type 1 Type 2 Hardware
PD
PD
Mode
AS1824*
x
x
AS1834*
x
x
AS1844*
x
x
x
AS1854*
x
x
x
* Industrial Temperature Range, -40°C to 85°C
Software
Mode
x
x
Pwr In
(W)
13
13
13/30
13/30
FEATURES
PoE PD Controller
Type 1 and Type 2 IEEE^® 802.3af & 802.3at Compliant PD
Automatic PoE-Plus (Type 2) detection in HW and
I²C Modes
Low Resistance PD Power FET Switch (0.5 typical)
Primary‐Side DC‐DC Controller
High-efficiency DC-DC Controller with Digital Optimization
Primary-Secondary High-voltage integrated Digital Isolation
Programmable Primary Clock Frequency
Local-power operation down to 9.5V
Secondary‐Side Power Outputs
Programmable PWM Frequencies synched to External Clock
Output #1: Sync Controller with programmable power FET
timing for high efficiency at both light and full load
Outputs #2 & #3: Buck Regulators w/2A FETs
Output #4: DC-DC Controller for Buck, Boost, or LED Boost
platform applications
EMC Compliance and Protection
Slew-rate-controlled power drivers
Multi-phased PWM clocking, with External Sync clock option
Optional spread-spectrum clocking available for all PWMs
Over-current, Under/Over-voltage and Short-circuit Protection
High-temperature warning and shutdown
Meets IEC 61000-4-2/3/4/5/6, IEC60747, IEC 60950, DIN
EN60747-5-2 (VDE0884), & UL1577 requirements for EMC
compliance and basic isolation to 2120 VDC (1500 VRMS)
100V Process for PoE transient voltage robustness
SIMPLIFIED APPLICATION DIAGRAM
Akros Silicon, Inc.
6399 San Ignacio Avenue, Suite 250, San Jose, CA 95119 USA
408.746.9000  http://www.AkrosSilicon.com