Texas Instruments LM74681 100V Ideal Diode Bridge Controller
Texas Instruments LM74681 100V Ideal Diode Bridge Controller drives a MOSFET bridge that enables efficient low-loss bridge rectifier solutions in Power over Ethernet (PoE) applications. This device operates at a 30V to 90V input voltage range. The LM74681 controller features 4x integrated gate drive control, 165µA gate pull-up strength, and 100mA gate pull-down strength. This controller includes a 0.27µA ultra-low quiescent current to ensure no data corruption during the PoE PD detection and classification phase. The LM74681 controller consists of an enable pin for a user-controlled device on/off function and operates at a junction temperature range of -40°C to 125°C. This controller comes in a 3mm x 3mm WSON-12 package and meets IPC-9592 spacing rules. Typical applications include polarity agnostic power inputs, video surveillance IP cameras, and PoE-powered devices (48V).
Features
- 30V to 90V input operating voltage range
- 100V absolute maximum voltage
- 4x integrated gate drive control
- 165μA gate pull-up strength
- 100mA gate pull-down strength
- Ultra-low quiescent current of 0.27μA during detection and classification phase (VIN1-IN2 <23V)
- VTG_REG = 11mV linear gate regulation control for supply ORing applications
- Enable pin for the user-controlled device on/off function
- -40°C to 125°C operating junction temperature range
- 3mm x 3mm WSON-12 small footprint
- Meets IPC-9592 spacing rules
Applications
- PoE powered devices (48V)
- IP cameras for video surveillance
- Polarity agnostic power inputs
Typical Application Schematic Diagram
Functional Block Diagram
Typical Application Circuit Diagram
Evaluation Module
Texas Instruments LM74681EVM Evaluation Module
Allows users to evaluate the LM74681 ideal diode bridge controller in a 12-pin DRR package.
Publicado: 2025-01-15
| Actualizado: 2025-03-17