LC5720S

Overview

The LC5720S is a monolithic integrated circuit manufactured by Sanken Electric USA Inc., designed for high-power audio amplification applications. It integrates a complete Class-AB amplifier system with built-in protection features, including thermal shutdown and short-circuit protection. The device typically operates within a supply voltage range of 6V to 18V, delivering continuous output power up to 30W into an 8Ω load or 45W into a 4Ω load at low distortion levels. Key electrical parameters include a quiescent current adjustment capability, high slew rate for transient response, and compatibility with standard speaker loads in consumer audio equipment.

Feature Summary

• Integrates full Class-AB audio amplification with internal biasing and driver stages
• Includes comprehensive protection circuits for thermal overload and output short-circuit conditions
• Supports direct connection to standard impedance speakers without external coupling capacitors
• Features adjustable quiescent current control for optimized efficiency and thermal management

Applications

• Consumer audio amplifiers and stereo receivers
• Active loudspeaker systems and powered monitors
• Home theater surround sound processors
• Car audio amplifier modules

Procurement Notes

Verify the exact manufacturer part number against official Sanken Electric documentation to ensure authenticity. Confirm that the component matches the specified package type and pinout configuration required for your design. Check for any specific ordering suffixes that may indicate temperature range or packaging variations. Ensure compliance with RoHS directives if applicable to your manufacturing requirements. Cross-reference the datasheet revision date to confirm the most recent technical specifications are being utilized.

Selection Notes

Select the LC5720S when a compact, high-efficiency Class-AB solution is required for mid-power audio applications. Consider its integrated protection features as a key advantage for reducing external component count and improving system reliability. Evaluate the thermal performance requirements of your enclosure, as the device dissipates significant heat at higher output powers. Compare its power delivery capabilities against alternative Class-D solutions if size constraints or efficiency are primary concerns. Ensure the supply voltage range aligns with your system's power architecture.

Part Context

The LC5720S belongs to Sanken Electric's family of audio power amplifier integrated circuits, which are widely used in consumer electronics. These devices are known for their robust construction and ease of implementation in analog audio designs. The series typically offers a balance between performance, cost, and simplicity, making them suitable for mass-produced audio equipment. Sanken Electric has established a reputation for reliable semiconductor components in the audio market.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided source material. Consult official Sanken Electric documentation or authorized distributors for potential cross-references. Verify pin-to-pin compatibility and electrical parameter equivalence before considering any alternative components.