AS1834

AS1834 Datasheet

AS1854/44/34/24 Digital Power PoE PD Controllers with HV Isolation and Quad DC-DC Outputs

Part	Datasheet
AS1834	AS1834 (pdf)

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AS1854/44/34/24 Digital Power PoE PD Controllers with HV Isolation and Quad DC-DC Outputs 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 1 802.3af and Type 2 802.3at 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. 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 Mode AS1824* AS1834* AS1844* AS1854* * Industrial Temperature Range, -40°C to 85°C Software Mode Pwr In W 13/30 13/30 PoE PD Controller Type 1 and Type 2 802.3af & 802.3at Compliant PD Automatic PoE-Plus Type 2 detection in HW and I2C Modes Low Resistance PD Power FET Switch typical 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 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 AS1854/44/34/24 TABLE OF CONTENTS GENERAL ORDERING POE PD CONTROLLER PRIMARY-SIDE DC-DC CONTROLLER SECONDARY-SIDE POWER OUTPUTS EMC COMPLIANCE AND SIMPLIFIED APPLICATION DIAGRAM TABLE OF CONTENTS FIGURES 4 TABLES PIN ASSIGNMENTS AND TEST SPECIFICATIONS TYPICAL PERFORMANCE FUNCTIONAL DESCRIPTION ISOLATION PD POWER MOSFET 21 UNDER-VOLTAGE LOCKOUT UVLO POE CURRENT LIMIT/CURRENT SENSE 21 OVER-TEMPERATURE PROTECTION PD OPERATING STATES CLASS 22 POWER ICLASS 22 RCLASS 22 AT DETECTION OPERATION AS1854/44 ONLY LOCAL POWER LDET MODE 23 AT_DET PSE = TYPE PSE = TYPE LOCAL ADAPTOR OR LOCAL VOLTAGE TYPICAL LDET VOLTAGE RANGE TO COVER PWM CLOCK GENERATION PWM CLOCK FREQUENCY EXTERNAL CLOCK SOURCE EMI PERFORMANCE POWER OUTPUT #1 24 PRIMARY-SIDE DC-DC CONTROLLER SOFT-START INRUSH CURRENT LIMIT CURRENT-LIMIT AND CURRENT SENSE SECONDARY-SIDE SYNC SYNC DELAY 25

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AS1854/44/34/24 Digital Power PoE PD Controllers with HV Isolation and Quad DC-DC Outputs

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 1 802.3af and Type 2 802.3at 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.

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

Mode

AS1824*

AS1834*

AS1844*

AS1854*
* Industrial Temperature Range, -40°C to 85°C

Software Mode

Pwr In W 13/30 13/30

PoE PD Controller

Type 1 and Type 2 802.3af & 802.3at Compliant PD Automatic PoE-Plus Type 2 detection in HW and

I2C Modes

Low Resistance PD Power FET Switch typical

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

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

AS1854/44/34/24

TABLE OF CONTENTS

GENERAL
ORDERING

POE PD CONTROLLER

PRIMARY-SIDE DC-DC CONTROLLER

SECONDARY-SIDE POWER OUTPUTS

EMC COMPLIANCE AND

SIMPLIFIED APPLICATION DIAGRAM

TABLE OF CONTENTS

FIGURES 4

TABLES

PIN ASSIGNMENTS AND

TEST SPECIFICATIONS

TYPICAL PERFORMANCE

FUNCTIONAL DESCRIPTION

ISOLATION

PD POWER MOSFET 21

UNDER-VOLTAGE LOCKOUT UVLO

POE CURRENT LIMIT/CURRENT SENSE 21

OVER-TEMPERATURE PROTECTION

PD OPERATING STATES

CLASS 22

POWER

ICLASS 22

RCLASS 22

AT DETECTION OPERATION AS1854/44 ONLY

LOCAL POWER

LDET MODE 23

AT_DET

PSE = TYPE

PSE = TYPE

LOCAL ADAPTOR OR LOCAL VOLTAGE

TYPICAL LDET VOLTAGE RANGE TO COVER

PWM CLOCK GENERATION

PWM CLOCK FREQUENCY

EXTERNAL CLOCK SOURCE

EMI PERFORMANCE

POWER OUTPUT #1 24

PRIMARY-SIDE DC-DC CONTROLLER

SOFT-START INRUSH CURRENT LIMIT

CURRENT-LIMIT AND CURRENT SENSE

SECONDARY-SIDE SYNC

SYNC DELAY 25

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Datasheet ID: AS1834 515967