What models can replace the TDA8950J/N1?

[chenyanyang]

Hello, I need a Class D audio amplifier with performance similar to the TDA8950J/N1, capable of being powered by ±12.5V-40V, with an output power of over 2×150W, featuring mute, short-circuit and thermal protection, standby mode, through-hole mounting, operating temperature range of -40°C to 85°C (TA), and available in either 1-channel (mono) or 2-channel (stereo) configurations.

[guoweisun]

Hi chenyanyang

The similar part is TDF8599.

You can refer to below link:

Product Selector | Car Audio Amplifiers | NXP Semiconductors

[WOSHINIDAD]

TDA8950J/N1 Background
Manufacturer: NXP Semiconductors
Specifications:
Type: Class D audio amplifier
Power supply range: ±12.5V to ±40V
Output power: 2×150W (4Ω load, ±37V), 2×170W (4Ω, ±39V), BTL mode 1×340W (8Ω, ±37V)
Function: mute, standby mode, short circuit protection, thermal protection
Package: DBS23P (through hole mounting)
Operating temperature: -40°C to 85°C
Configuration: Stereo single-ended (SE) or mono bridge (BTL)
Status: Marked as discontinued or "Not Recommended for New Design" (NRND), inventory is gradually decreasing.
Your needs are highly consistent with TDA8950J/N1, but since it is discontinued, you need a replacement. The following are suggestions that meet your requirements:

Recommendations for replacements
1. TDA8954J (NXP Semiconductors)
Specifications:
Power supply range: ±12.5V to ±42.5V
Output power: 2×210W (4Ω, ±41V), BTL 1×420W (8Ω, ±41V)
Functions: mute, standby, short circuit protection, thermal protection
Package: DBS23P (through-hole mounting, pin-compatible with TDA8950J)
Operating temperature: -40°C to 85°C
Configuration: Stereo SE or mono BTL
Advantages:
Direct replacement for TDA8950J, pin-to-pin compatible, no need to redesign PCB.
Higher output power (210W vs. 150W), meeting the demand for "more than 2×150W".
Availability: Some distributors (such as DigiKey, Mouser) still have stock, but it is also close to NRND, so it is recommended to purchase as soon as possible.
2. TAS5630BPHD (Texas Instruments)
Specifications:
Power supply range: 25V to 52V (±12.5V to ±26V dual power supply adaption available)
Output power: 2×300W (4Ω, 50V), BTL 1×600W (8Ω, 50V)
Functions: mute, short circuit protection, thermal protection, standby mode (by external control)
Package: HTQFP-64 (surface mount, but through-hole mounting is possible via adapter board)
Operating temperature: -40°C to 85°C
Configuration: Stereo SE or mono BTL
Benefits:
Power output far exceeding 2×150W, suitable for high-performance applications.
High efficiency (>88%), low heat dissipation.
Challenges:
Non-through-hole package, need to design adapter board or modify PCB.
Power range needs to be adjusted (if using ±40V, need to reduce voltage or confirm compatibility).
3. IRS2092S + external MOSFET (Infineon Technologies)
Specifications:
Control IC: IRS2092S (Class D driver)
Power supply range: ±12.5V to ±100V (depending on external MOSFET)
Output power: 2×200W (4Ω, ±40V) with MOSFET (such as IRFB4227)
Functions: mute, standby (via MODE pin), short circuit and thermal protection (built-in)
Package: SOIC-16 (requires through-hole MOSFET and self-made PCB)
Operating temperature: -40°C to 125°C
Configuration: Stereo or mono (flexible design)
Benefits:
Highly customizable to precisely meet power requirements of 2×150W+.
Through-hole components can be realized with external MOSFETs and fit into existing designs.
Challenges:
A complete circuit (including power stage and filter) needs to be designed, which is more complex than a direct IC solution.
It is recommended to refer to Infineon's "IRAUDAMP7S" design.
4. STA516B (STMicroelectronics)
Specifications:
Power supply range: 10V to 60V (±12.5V to ±30V available)
Output power: 2×200W (4Ω, 50V), BTL 1×400W (8Ω, 50V)
Functions: mute, short circuit protection, thermal protection, standby mode
Package: FLEXIWATT-36 (through-hole mounting)
Operating temperature: -40°C to 85°C
Configuration: Stereo or mono
Advantages:
Through-hole package, easy replacement for TDA8950J.
Power exceeds 2×150W, fully matched functions.
Challenges:
Different pins, need to adjust PCB or use adapter board.
Power supply upper limit is lower than ±40V, need to confirm application voltage.
Recommendation and Selection
First Choice: TDA8954J
Reason: Pin compatible with TDA8950J, higher power, no PCB changes, directly meets all requirements.
Action: Contact DigiKey or Mouser to check inventory (about $10-$15/unit, small quantity price).
Second Choice: STA516B
Reason: Through-hole package, sufficient power, matching functions, can be used as an alternative if TDA8954J is out of stock.
Action: Check STMicroelectronics distributors (such as Arrow), expect $8-$12/unit.
Customization Option: IRS2092S
Reason: Best flexibility and future expansion, but requires design experience.
Action: Download the "IRAUDAMP7S" reference design and purchase IRS2092S (about $3-$5/pc) and MOSFET.
Notes
Power supply matching: If using ±40V, confirm the maximum withstand voltage of the alternative (TDA8954J and IRS2092S support, STA516B needs to be reduced).
Thermal management: 2×150W+ output requires good heat dissipation (such as heat sink or fan), especially in an 85°C environment.
Test verification: After purchasing samples, use an oscilloscope to check the mute/standby response time to ensure that short-circuit and thermal protection are effective.