IRS20124STRPBF

Audio Special Purpose Overview

The IRS20124STRPBF is a digital audio driver IC designed for Class D audio amplifier applications. It features a 14-lead SOIC package and operates with a supply voltage range of 10 V to 20 V. The device provides high-voltage ratings up to 200 V, integrated dead-time generation, and bi-directional over-current sensing capabilities.

Audio Special Purpose Feature Summary

• Integrated programmable deadtime generation with selectable presets (15 ns, 25 ns, 35 ns, 45 ns) to optimize THD performance.
• Bi-directional over-current sensing utilizing the low-side MOSFET RDS(ON) without additional external passive components.
• High-voltage ratings supporting up to 200 V floating supply for driving high-power Class D amplifiers.
• Shutdown function via the DT/SD pin to protect devices from overload conditions.
• Operates at frequencies up to 1 MHz.
• 3.3V/5V logic compatible inputs.

Audio Special Purpose Applications

• Class D audio amplifier output stages
• High-power audio amplifier designs requiring integrated protection and deadtime control

Audio Special Purpose Procurement Notes

This component is marked as Obsolete and is no longer manufactured by Infineon Technologies. Distributors may list it as 'End of Life' or offer substitute parts such as the IRS20957STRPBF. Verify availability and lead times through authorized distributors.

Audio Special Purpose Selection Notes

Select this driver for legacy Class D amplifier designs requiring integrated deadtime control and bi-directional current protection. Note that the part is obsolete; new designs should consider modern replacements like the IRS20957 series. Ensure the 10 V to 20 V supply range and 14-SOIC package align with target PCB design constraints.

Audio Special Purpose Part Context

This component belongs to the IRS20124 series of digital audio drivers. It was specifically engineered to simplify Class D amplifier designs by combining gate driving, deadtime generation, and protection functions into a single monolithic IC, reducing the external component count compared to discrete solutions.

Audio Special Purpose Replacement Considerations

The IRS20124STRPBF is officially obsolete. Recommended substitutes include the IRS20957STRPBF. Verify compatibility with existing circuit layouts if considering alternative drivers, as pin configurations and internal logic may differ.

Audio Special Purpose FAQ

How is the deadtime configured?

Deadtime is set via the DT/SD pin using an external resistor divider network connected to VCC. Four preset values (15 ns, 25 ns, 35 ns, 45 ns) are selectable based on the voltage applied to this pin.

What is the mechanism for over-current detection?

The device uses bi-directional over-current sensing by monitoring the VS node voltage relative to the low-side MOSFET's RDS(ON). Thresholds are set externally via OCSET1 and OCSET2 pins.

What is the maximum operating frequency?

The IRS20124 is capable of operating at frequencies up to 1 MHz.