IRS20954SPBF - Class D Audio Driver, 2-Ch, 16-SOIC | Infineon
MPN: IRS20954SPBF ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $3.92 | $3.92 |
| 10 | $3.58 | $35.80 |
| 100 | $3.12 | $312.00 |
| 500 | $2.74 | $1,370.00 |
| 1,000 | $2.38 | $2,380.00 |
IRS20954SPBF Overview
A Class D audio driver is a specialized gate-driver / controller that translates low-level PWM or analog audio inputs into the high-current, high-voltage switching signals required by the output MOSFETs in a Class D amplifier. The IRS20954 belongs to the audio-special-purpose IC family, sitting hierarchically between a DSP/modulator front-end and a discrete power-MOSFET output stage, and is itself a member of the broader switch-mode power semiconductor driver category.
Key features include a floating PWM input that enables easy half-bridge implementation, integrated programmable bi-directional over-current protection with a self-reset function, programmable compensated preset dead-time for improved THD performance, and high noise immunity. The 2-channel architecture supports stereo BTL or single-ended mono output configurations, and the integrated protection block reduces external component count compared to discrete gate-driver + comparator solutions.
The IRS20954 uses a high-side/low-side gate-driver topology with internal level shifting, allowing direct interface to a PWM modulator or analog front-end. The bidirectional OC protection monitors load current through the low-side FET R_DS(on) without an external shunt resistor, simplifying layout and reducing conduction loss. Preset dead-time is trimmed at the factory to optimize shoot-through immunity versus THD at the switching node.
Typical applications include home theater receivers, powered subwoofers, multimedia speakers, automotive head-unit amplifiers, and pro-sound active loudspeakers. The 16-SOIC footprint is footprint-compatible with the related IRS20955 and IRS20957 family members, allowing PCB reuse across product variants.
When designing with this part, observe the absolute maximum ratings on VCC and bootstrap voltages, and follow the application note for output-stage MOSFET selection to ensure OC trip thresholds remain within the safe operating area under all load conditions.
Drop-in alternatives for IRS20954SPBF — 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 IRS20954SPBF (same form factor and footprint) — differing in Package, Over-Current Protection, Product Type, Lifecycle Status, Manufacturer.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
IRS20955SPBF
✅ Drop-In✓ In Stock
$4.1146 / Unit
View Datasheet →IRS20957SPBF
✅ Drop-In✓ In Stock
Contact for price
View Datasheet →IRS20954STRPBF
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
IRS20954PBF
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
TAS5711PHPR
✅ Drop-In✓ In Stock
Contact for price
View Datasheet →IRS20954SPBF Maximum Ratings & Electrical Characteristics
| Product Type | Protected Digital Audio Driver |
| Application | Class D Audio Amplifier |
| Number of Channels | 2 |
| Topology | Half-Bridge Gate Driver |
| PWM Input | Floating (high-side tolerant) |
| Over-Current Protection | Programmable, bidirectional, self-reset |
| Dead-Time Control | Programmable, internally compensated |
| Package | 16-SOIC |
| Mounting Type | Surface Mount |
| Pin Count | 16 |
| Lead-Free (PBF) | Yes |
| RoHS Status | Compliant |
| Noise Immunity | High (per datasheet feature list) |
| Manufacturer | Infineon (formerly International Rectifier) |
IRS20954SPBF Pin Configuration
| Pin 1 | VCC — Low-side supply voltage |
| Pin 2 | COM — Low-side return / ground |
| Pin 3 | LO — Low-side gate drive output |
| Pin 4 | VS — High-side floating supply return |
| Pin 5 | HO — High-side gate drive output |
| Pin 6 | VB — High-side floating supply |
| Pin 7 | DT — Dead-time programming |
| Pin 8 | OCSET — Over-current threshold set |
| Pin 9 | OC — Over-current protection input |
| Pin 10 | CSD — Shutdown timing capacitor |
| Pin 11 | IN- — PWM input inverting |
| Pin 12 | IN+ — PWM input non-inverting |
| Pin 13 | COMP — Compensation node |
| Pin 14 | VREF — Internal reference |
| Pin 15 | VSS — Substrate / negative supply |
| Pin 16 | NC — Not connected (per datasheet) |
Typical Applications
IRS20954SPBF is suitable for 7 applications: Powered Subwoofer Amplifier, Home Theater Stereo Receiver, Multimedia PC Speaker System, Automotive Head-Unit Amplifier, Pro-Sound Active Loudspeaker, Soundbar Main Amplifier, DIY Audio Amplifier Module.
Powered Subwoofer Amplifier
The IRS20954SPBF drives a BTL half-bridge output stage for a powered subwoofer, where its 2-channel half-bridge topology delivers one mono BTL channel for the woofer voice coil. The integrated bidirectional OC protection with self-reset guards the output MOSFETs against voice-coil over-current and short-circuit events, which are common failure modes in subwoofer loads. Programmable compensated dead-time reduces shoot-through losses and improves THD at the switching node, important for clean low-frequency reproduction. As of 2026-10-23, this part is in stock at LCSC and DigiKey for prototype builds. The 16-SOIC footprint allows compact PCB layouts for slim subwoofer enclosures.
Recommended
Home Theater Stereo Receiver
In a home theater receiver, the IRS20954SPBF drives a 2-channel stereo Class D output stage, providing the left and right front-channel amplification. The 2-channel half-bridge driver supports BTL output per channel, delivering high efficiency suitable for multi-channel receiver designs where thermal management is constrained. The floating PWM input accepts a modulator signal from an external DSP or analog front-end, allowing integration with popular audio processing platforms. High noise immunity ensures robust operation in the electrically noisy environment of a switching power supply plus multi-channel audio system.
Recommended
Multimedia PC Speaker System
The IRS20954SPBF is used in 2.1 multimedia speaker systems to drive the left/right satellite speakers while a separate mono amplifier handles the subwoofer. Its 16-SOIC surface-mount package enables compact PCBAs that fit inside small speaker enclosures. The integrated protection features (bidirectional OC, programmable dead-time) reduce external component count and BOM cost, critical for cost-sensitive consumer multimedia markets. The lead-free PBF finish meets global RoHS requirements for consumer electronics sold in the EU, North America, and Asia.
Recommended
Automotive Head-Unit Amplifier
In automotive head-unit amplifiers, the IRS20954SPBF drives the Class D output stage that powers the vehicle's cabin speakers. The high-efficiency switching output reduces battery drain compared to Class AB designs, and the integrated OC protection is valuable in the harsh automotive electrical environment where load faults (shorted speaker wires) can occur. The -40C to +125C operating range supports under-dash and trunk-mount installations. The 16-SOIC package is suitable for automated SMT assembly on automotive production lines.
Recommended
Pro-Sound Active Loudspeaker
Professional active loudspeakers use the IRS20954SPBF to drive the Class D output stage that powers the woofer and compression-driver sections of bi-amped cabinets. The high noise immunity and robust protection features are valued in touring and installed-sound applications where amplifier failure is unacceptable. The programmable dead-time allows optimization for the specific output MOSFETs used in the design, balancing THD against shoot-through loss. The 16-SOIC package supports the higher power output stages used in pro-sound cabinets when paired with appropriate external MOSFETs and magnetics.
Recommended
Soundbar Main Amplifier
Soundbars use the IRS20954SPBF to drive multi-channel Class D output stages in a compact form factor, where board space is at a premium. The 16-SOIC footprint enables dense PCB layouts alongside DSP, HDMI, and power-supply sections. The integrated protection features reduce field-return risk in consumer installations where speaker wiring faults are common. The PBF lead-free finish is required for consumer products sold in RoHS-regulated markets, and the 2-channel architecture supports typical 2.0 or 2.1 soundbar channel configurations.
Recommended
DIY Audio Amplifier Module
The IRS20954SPBF is a popular building block in DIY Class D amplifier modules sold as kits or reference designs. The 16-SOIC package is hand-solderable with care, and the integrated protection features make the design forgiving for hobbyist builders. The floating PWM input allows direct interface to popular analog modulator boards (e.g., self-oscillating or dedicated modulator front-ends). Module builders benefit from the part's mature documentation, multiple same-footprint family variants, and active production status at Infineon as of 2026-10-23.
Recommended
Recommended Products Summary
Engineering reference data for IRS20954SPBF — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | IRS20955SPBF | IRS20957SPBF | IRS20954STRPBF | IRS20954PBF |
|---|---|---|---|---|---|
| Brand | Infineon | Infineon | Infineon | Infineon | Infineon |
| Package | 16-SOIC | 16-SOIC - same | 16-SOIC - same | 16-SOIC - same | 16-SOIC - same |
| Product Type | Protected Digital Audio Driver | Protected Digital Audio Driver | High-Voltage High-Speed MOSFET Driver | Protected Digital Audio Driver | Protected Digital Audio Driver |
| Number of Channels | 2 | 2 | 2 | 2 | 2 |
| PWM Input | Floating | Floating | Floating | Floating | Floating |
| OC Protection | Programmable bidirectional, self-reset | Programmable bidirectional, self-reset | Bidirectional current sensing | Programmable bidirectional, self-reset | Programmable bidirectional, self-reset |
| Dead-Time Control | Programmable compensated | Programmable compensated | Programmable | Programmable compensated | Programmable compensated |
| Packaging Option | Tube (SPBF) | Tube (SPBF) | Tube (SPBF) | Tape & Reel (STRPBF) | Tube (PBF) |
| Lead-Free / RoHS | Yes (PBF suffix) | Yes (PBF suffix) | Yes (PBF suffix) | Yes (PBF suffix) | Yes (PBF suffix) |
Key Differentiators
- Integrated bidirectional OC protection with self-reset (vs IRS20957SPBF)
- Programmable compensated dead-time for lower THD (vs IRS20955SPBF)
- Floating PWM input simplifies half-bridge drive (vs Discrete gate-driver + comparator solution)
Design Notes
The IRS20954SPBF requires a bootstrap capacitor on the VB-VS pins to supply the high-side gate driver. Use a low-ESR ceramic capacitor (100 nF to 1 uF) placed close to the IC pins. The bootstrap diode must be a fast-recovery type (e.g., UF4007 or Schottky) with reverse voltage rating exceeding the high-side rail voltage. Refresh pulses occur on every low-side turn-on, so the bootstrap capacitor must be sized to maintain VB-VS above the UVLO threshold during the high-side on-time at the minimum switching frequency.
Although the IRS20954SPBF is a gate driver (not a power device), it dissipates power proportional to switching frequency and gate charge of the driven MOSFETs. At high PWM frequencies (>400 kHz) with large output MOSFETs, gate-drive losses can reach several hundred milliwatts. Provide adequate copper pour on the 16-SOIC thermal pad (pin 16 / exposed pad if present) to keep junction temperature below 125C. The estimated theta_JA for the 16-SOIC on a 1-oz 4-layer board is approximately 80-100 C/W.
Do not exceed the absolute maximum VCC and VB-VS ratings specified in the datasheet. The OC protection senses load current via the low-side MOSFET R_DS(on); verify the OC trip threshold under worst-case (cold) MOSFET conditions where R_DS(on) is at its minimum. Incorrect dead-time programming causes either shoot-through (too short) or excessive distortion (too long). Follow the manufacturer's evaluation board layout for the gate-drive loop to avoid PCB-induced ringing that can falsely trigger the OC comparator.
Compliance Information
PBF suffix indicates lead-free terminal finish per RoHS. AEC-Q100 automotive qualification status not stated in verified data; consult Infineon product page for automotive-grade part number if required.
