IRS20957SPBF - 100V Protected Class-D Audio Driver | Infineon
MPN: IRS20957SPBF ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $0 | $0.00 |
| 10 | $0 | $0.00 |
| 100 | $0 | $0.00 |
| 500 | $0 | $0.00 |
| 1,000 | $0 | $0.00 |
IRS20957SPBF Overview
What is a protected digital audio driver? A Class-D audio driver is a gate-drive IC that accepts a PWM command and controls the switching MOSFETs in an audio half-bridge. The IRS20957SPBF provides the gate-drive and current-sense functions required around external power MOSFETs; it is not itself a full audio power amplifier. Its floating PWM input supports convenient half-bridge implementation, while the high-voltage output stage permits a Class-D amplifier topology using suitably rated external transistors.
Key features include 100 V MOSFET-driver capability, 1.0 A peak output current, and a 500 ns listed in distributor specifications. The floating PWM input simplifies control-signal interfacing. Bidirectional current sensing detects over-current conditions in positive and negative load-current directions without an external shunt resistor, helping simplify protection in bidirectional audio output stages. Programmable preset dead time can be adjusted for the external MOSFETs and system timing requirements.
The device is packaged as a 16-SOIC, narrow-body surface-mount component. Its protected-driver feature set is intended to support robust audio power-stage designs where output-current detection, fault response, and shutdown behavior are important. The half-bridge approach allows the external MOSFETs and speaker output network to be sized independently from the control and driver IC. Exact pin names, timing values, current-limit thresholds, and recommended external-component values should be taken from the Infineon datasheet.
Typical uses include mono Class-D speaker amplifiers, compact consumer-audio modules, powered speaker systems, USB or multimedia audio outputs, and industrial audio equipment. The driver can be paired with appropriately rated power MOSFETs, gate resistors, PWM sources, and output filtering. Design attention should focus on MOSFET voltage and current ratings, gate-drive timing, dead-time selection, current-sense thresholds, thermal behavior, and the floating-input common-mode arrangement.
For a robust implementation, verify all external MOSFETs against the 100 V driver capability and the intended amplifier voltage. Use the datasheet-recommended protection and shutdown network, provide adequate local decoupling, and route high-current gate and power paths separately from sensitive PWM and current-sense traces. This page consolidates verified manufacturer and distributor information while identifying unspecified parameters for engineer review.
This product data summarizes the verified source information, practical design guidance, and sourcing references. It is intended to support engineering selection, not to replace the complete Infineon datasheet for production design, qualification, or safety validation.
Drop-in alternatives for IRS20957SPBF — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with IRS20957SPBF (same form factor and footprint) — differing in Over-Current Protection, Package, Product Type.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
IRS20957STRPBF
✅ Drop-In📋 Reference alternative (not in catalog)
IRS20957SPBF
✅ Drop-In✓ In Stock
Contact for price
View Datasheet →IRS20957SPBF Maximum Ratings & Electrical Characteristics
| Product Type | Protected digital audio MOSFET driver |
| Audio Amplifier Class | Class D |
| Speaker Channels | 1 channel |
| Audio Input Type | PWM |
| Output Type | 1-channel half-bridge driver |
| Maximum Output Voltage | 100 V |
| Output Current | 1.0 A |
| Response Time | 500 ns |
| Input Type | Floating PWM input |
| Current Sensing | Bidirectional over-current sensing without external shunt resistor |
| Over-Current Protection | Programmable with self-reset function |
| Dead Time | Programmable preset dead time |
| Shutdown | Shutdown function |
| Supply Voltage | 10 V to 15 V |
| Package | 16-SOIC narrow package |
| Package Pin Count | 16 pins |
| Mounting Type | Surface mount |
| Manufacturer Description | High-voltage, high-speed MOSFET driver with floating PWM input for Class-D audio amplifier applications |
IRS20957SPBF 16 pins Pin Configuration Guide
Pin configuration for IRS20957SPBF (16 pins package). This power device features gate, drain, and source terminals. For non-polarized packages, refer to the manufacturer datasheet for exact pin 1 orientation and footprint details. Common applications include power supply design, motor driving, and load switching.
No detailed pinout data available for IRS20957SPBF.
Refer to the datasheet for full pin configuration.
Typical Applications
IRS20957SPBF is suitable for 6 applications: Mono Class-D Speaker Amplifier, Compact Powered Speaker Module, Multimedia Audio Output Stage, Industrial Audio Amplifier, Portable Speaker Amplifier, USB or Interface-Powered Audio.
Mono Class-D Speaker Amplifier
The IRS20957SPBF fits a one-channel Class-D speaker amplifier because it accepts a floating PWM input and drives a half-bridge power stage using external MOSFETs. Its 100 V driver capability and 1.0 A output-current specification provide a useful basis for compact speaker-drive designs, while programmable dead time supports controlled switching between the upper and lower devices. Use the manufacturer datasheet to set current sensing, protection, and shutdown behavior.
Recommended
Compact Powered Speaker Module
For a compact powered speaker module, the IRS20957SPBF can provide the protected gate-drive control layer between a PWM audio signal and externally selected power MOSFETs. Bidirectional current sensing without an external shunt resistor can simplify the sensing arrangement, while the 16-SOIC package supports conventional surface-mount PCB assembly. Actual output power depends on the MOSFETs, supply rail, speaker impedance, and thermal design.
Recommended
Multimedia Audio Output Stage
The IRS20957SPBF is suitable for a multimedia or powered-speaker output stage where a PWM signal drives a protected Class-D half-bridge. Its floating PWM input simplifies the interface concept, and programmable dead time helps align switching behavior with the selected external MOSFETs. The 10 V to 15 V supply range and 100 V driver rating should be reconciled with the amplifier's actual bus voltage and transient margin.
Recommended
Industrial Audio Amplifier
The IRS20957SPBF can serve as the protected MOSFET-driver element in an industrial audio amplifier requiring a one-channel Class-D output. Bidirectional over-current detection and self-reset behavior are useful when the speaker load or external wiring can create abnormal current conditions. Qualification still requires checking electromagnetic behavior, temperature range, fault-state recovery, and the long-term availability of the selected external MOSFETs.
Recommended
Portable Speaker Amplifier
In a portable speaker amplifier, the IRS20957SPBF provides a compact protected driver interface for a PWM-driven half-bridge. The floating PWM input helps accommodate a control-signal arrangement in a constrained board layout, while shutdown support can assist system power management. Designers must still manage battery-bus transients, conversion efficiency, speaker impedance, thermal rise, and the switching losses of the external MOSFET stage.
Recommended
USB or Interface-Powered Audio
IRS20957SPBF can be used in an interface-powered audio module when the system provides a compliant Class-D power stage and suitable protection. The driver's one-channel architecture matches a mono speaker channel, while current sensing and shutdown functions help manage unexpected output conditions. Because the verified data does not identify companion MPNs or exact timing values, the complete interface and power-conversion circuit must be validated from the manufacturer datasheet.
Recommended
Engineering reference data for IRS20957SPBF — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | IRS20957STRPBF | IRS20957SPBF |
|---|---|---|---|
| Brand | Infineon Technologies | Infineon Technologies | Infineon Technologies |
| Package | SOIC-16 | SOIC-16 | SOIC-16 |
| Audio Channels | 1 channel | 1 channel | 1 channel |
| Audio Input Type | PWM | PWM | PWM |
Key Differentiators
- Protected Class-D driver positioning (vs IRS20957STRPBF)
- Bidirectional current-sensing implementation (vs IRS20957STRPBF)
- Floating PWM interface (vs IRS20957SPBF)
Design Notes
Select external power MOSFETs with voltage, current, gate-charge, and thermal ratings appropriate for the intended Class-D amplifier rail and speaker load. The verified IRS20957SPBF data identifies a 100 V driver rating, but that rating does not prove that every 100 V MOSFET is safe in the final application. Check bus transients, switching losses, body-diode behavior, and the complete power-stage SOA.
Keep the floating PWM and current-sense paths short and isolated from high-current gate-drive loops. Place recommended decoupling close to the supply pins, use low-independence gate-loop routing, and keep the external MOSFET switching node compact. Confirm pin assignments and layout recommendations in the official Infineon datasheet because the verified web snippets do not provide a complete pin map.
Do not treat the 1.0 A output-current value as speaker output power; IRS20957SPBF is a MOSFET driver and its current rating applies to the driver stage, while amplifier power depends on the external MOSFETs, supply rail, switching frequency, and load. Validate dead time, over-current thresholds, shutdown polarity, and fault recovery under worst-case speaker impedance and temperature.
Compliance Information
The supplied verified sources do not state RoHS, REACH, lead-free, halogen-free, conflict-minerals, or AEC-Q100 status. These fields remain unknown or not applicable rather than inferred from the manufacturer name or product category.
