Folsom, Calif.Akros Silicon Inc. announced the availability of its AS1100 family of devices that it claims offers the smallest footprint and highest integration for Power over Ethernet (PoE) Powered Device (PD) applications.
Applications include VoIP phones, IP security cameras and wireless LAN access points.
The AS1100 family includes the AS1113 device for IEEE 802.3af-2003 specification power levels and the AS1124 device for either 802.3af or 802.3at pre-standard power levels. The AS1113 and AS1124 are built using standard HV CMOS technology and include system-level circuitry for lower EMI emissions and robust surge protection in addition to the PD controller functionality.
The AS1113 for 13W applications includes the current 802.3af PD standard. The AS1124 for 24W applications encompasses the pre-802.3at standard with "two finger classification" and is backward compatible to current 802.3af customer needs.
The AS1100 family combines rectification and protection circuitry with a PD controller and a DC/DC controller. This high level of integration provides significant reliability and protection advantages, as well as simplifies the PoE PD design. The devices provide seamless support for local power and over temperature protection. Additionally, the pin compatibility between the AS1113 and AS1124 allows the designer to use the same PCB for higher power applications, often without the need for a complete redesign.
The AS1100 family also provides advanced power management through integration of a hot-swap switch and a DC/DC controller that operates from a switched input voltage and includes soft-start and current limiting functions. The DC/DC architecture is a current mode converter, which can be configured with external component changes for either fly-back, forward, or buck topologies to support non-isolated or isolated switching topologies.
Pricing: The AS1113 and AS1124 are priced at $1.33 and $1.46, respectively, in 1,000-unit quantities.
Availability: In 20-pin QFN RoHS-compliant packages.
Datasheets: AS1113 and AS1124.
Akros Silicon, 1-916-351-8100, www.akrossilicon.com