AS1851A
Description
The AS1851A and AS1831A devices each integrate Akros GreenEdge™ High Voltage Isolation technology with Power-overEthernet (PoE) PD and Synchronous DC-DC power conversion technology. The AS1851A includes a 13W/25W (Type 1 and Type 2) IEEE®802.3af/at compliant PD integrated with high-voltage isolation and a digital power Synchronous DC-DC converter.
Key Features
- Type 1 and Type 2 IEEE® 802.3af & 802.3at compliant PD (AS1851A), Type 1 only (AS1831A)
- Automatic PoE-Plus (Type
- detection in HW and I2C Modes (AS1851A only)
- 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 Sync Power Output
- Synchronous Controller with programmable power-FET timing for high efficiency at both light and full load
- Programmable PWM Frequencies synched to External Clock Power Management
- Hardware programmable start-up power sequencing
