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Overview
| Topology | A-PHY |
| Input voltage | 9-17.5 V |
| Output 1 | 16.2 V / 0.05 A |
Description
The EVAL-LT8440-AZ evaluation circuit features the LT8440 used in a load power port of an intrinsically safe field device. It can regulate and limit the power drawn by the port according to the Ethernet Advanced Physical Layer (Ethernet-APL) standard. The EVAL-LT8440-AZ is designed with three LT8440s in series to meet the triple redundancy requirement of intrinsic safety Ex ia for class A field devices, but it can be configured to work with a lower LT8440 count. See the Redundancy of LT8440 section for more details.
Features
- 650mW Power Limit for Intrinsic Safety Thermal
- Rating when Line Voltage ≤ 18.5V
- 35mA Current Limit if Line Voltage > 18.5V
- 55mA Current Limit for APL Class A Devices
- Shunt Regulator for Mitigating Load Changes
- Guaranteed 20mA Rectifier Current for Signal Integrity
- Guaranteed to deliver full 500mW APL power to the load
- 6V to 36V Input Voltage
- Integrated Current Sense Resistor
- Polarity Insensitive Line Voltage Detection
- 8-Lead SOIC Package with Exposed Pad
Typical applications
- Industrial Ethernet, Advanced Physical Layer, Current Limiting
More information
Products
Order Code | Datasheet | Simulation | Downloads | Status | Product series | Winding Style | Number of windings | L(µH) | Zmax(Ω) | IR(mA) | RDC max.(Ω) | VR(V) | Samples | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
 | WE-SL2 SMT Common Mode Line Filter, bifilar, 2 | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-SL2 SMT Common Mode Line Filter | Winding Stylebifilar | Number of windings2 | Inductance500 µH | Maximum Impedance3300 Ω | Rated Current1000 mA | DC Resistance0.15 Ω | Rated Voltage80 V |