Analog Devices Inc. LT4293 Interface Controller
Analog Devices LT4293 Interface Controller is an LTPoE++/IEEE 802.3af/at/bt-compliant powered device. The T2P output distinguishes between LTPoE++ and IEEE 802.3bt power sourcing equipment (PSE) during mutual identification and negotiation of available power. The LT4293 utilizes an external, low RDS(ON), N-channel, hot swap MOSFET. It supports the LT4320/LT4321 ideal bridges, extending the efficiency of the end-to-end power delivery and eliminating costly heat sinks. The LT4293 has good power output, an onboard signature resistor, undervoltage lockout, and thermal protection. The startup inrush current is adjustable with an external capacitor. Auxiliary power override is supported as low as 9V with the AUX pin.
Features
- LTPoE++®/IEEE 802.3bt Powered Device (PD) controller
- Supports up to 90W PDs
- Distinguishes between LTPoE++ and IEEE 802.3bt PSEs
- 5-event classification sensing
- Superior surge protection (100V absolute maximum)
- Wide junction temperature range (-40°C to 125°C)
- Overtemperature protection
- Integrated signature resistor
- External Hot Swap N-channel MOSFET for lowest power dissipation and highest system efficiency
- Configurable aux power support as low as 9V
- Pin compatible with LT4275A/B/C and LT4294
- Available in 10-lead MSOP and 3mm × 3mm DFN packages
Applications
- High-power wireless data systems
- Outdoor security camera equipment
- Commercial and public information displays
- High-temperature industrial applications
Associated Development Tool
Analog Devices Inc. LT4321 Demo Board DC2911A
Features the LT4293 PD interface controller and the LT4321 PoE ideal diode bridge controller.
TYPICAL APPLICATION
Published: 2019-06-25
| Updated: 2024-03-18