HV461FG-G

Telecom Overview

The HV461FG-G is a ring generator controller IC designed for four-quadrant inverter topologies with synchronous rectifiers. It operates from a standard -48V telecom supply and delivers a floating 94VAC (rms) waveform to drive up to a 40 REN load. The device features an internal sine wave synthesizer providing eight built-in frequencies (12Hz to 60Hz) or external frequency input via the FRING pin. Digital control of amplitude, offset, and frequency is supported via an 8-bit bus or individual inputs. It includes an internal boost converter for gate drive voltages, adjustable over-current protection, and power-on reset/undervoltage lockout. Operating temperature range is -40°C to +85°C.

Telecom Feature Summary

• Digital control of ring frequency, amplitude, and DC offset
• Internal sine wave synthesizer with eight built-in frequencies
• Integrated boost converter for primary and secondary gate drive
• Adjustable over-current protection and fault detection output

Telecom Applications

• PBX systems
• DLC (Digital Loop Carrier)
• Key Systems
• Remote Terminal units
• Wireless Loop Systems

Telecom Procurement Notes

Verify package option and packing quantity against specific project requirements. The HV461FG-G is available in a 48-Lead LQFP package. Standard packing is 250 units per tray. A reel option containing 1000 units is also available under the M931 suffix. Ensure compatibility with RoHS compliance standards if required by the manufacturing process.

Telecom Selection Notes

Select this component for applications requiring precise digital control of ringing signals from a -48V source. The integrated sine wave synthesizer simplifies design by eliminating external oscillators for standard frequencies. Consider the 48-pin LQFP package for board space constraints. Verify that the external power stage MOSFETs are compatible with the internal gate drive voltage levels provided by the VGD pin.

Telecom Part Context

The HV461 is manufactured by Supertex Inc., which was acquired by Microchip Technology. This part belongs to the family of telecom interface and power management solutions. It is specifically engineered for legacy and modern telephone exchange equipment requiring efficient high-voltage AC generation from low-voltage DC supplies.

Telecom Replacement Considerations

Direct replacement options should be sought within the Microchip portfolio. Verify pin-to-pin compatibility and electrical specifications such as operating voltage and current drive capabilities before substitution.