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STMicroelectronics TDA7498ETR
- Part No.:
- TDA7498ETR
- Manufacturer:
- STMicroelectronics
- Category:
- Audio Amplifiers
- Package:
- 36-PowerFSOP (0.295", 7.50mm Width)
- Datasheet:
-
TDA7498ETR.pdf
- Description:
- IC AMP D MONO/STER 220W PWRSSO36
- Quantity:
- Payment:
- Shipping:
Inventory:6,350
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Product details
Overview
TDA7498ETR from STMicroelectronics is a dual-channel Class-D audio amplifier in PowerSSO-36 EPU package, delivering 160 W + 160 W into 4 Ω at 10% THD with 36 V supply, supporting stereo or mono parallel BTL mode via MODE pin, and featuring four fixed gain settings (23.8–35.8 dB), differential inputs, and smart thermal/overcurrent protection - used in high-power active speakers and home theater amplifiers.
For engineers reviewing the TDA7498ETR datasheet, TDA7498ETR pinout, TDA7498ETR application, or TDA7498ETR equivalent, key selection considerations include its single-supply 14–36 V operation, 85% efficiency, 20 mV max output offset, diagnostic open-drain output (DIAG), and exposed-pad thermal management for heatsink mounting.
Technical Context
The TDA7498ETR integrates two identical Class-D PWM amplifier channels with internal oscillator (240–400 kHz), configurable via ROSC and SYNCLK pins. Each channel employs differential input architecture with 69 kΩ input resistance and supports independent standby/mute control via STBY and MUTE pins.
Its parallel BTL mono mode combines both channels to drive a single 3 Ω load with 220 W output at 10% THD, enabled by MODE pin logic. Protection includes thermal shutdown at 140–160 °C junction temperature, overcurrent detection (10–14 A), undervoltage lockout (~8 V), and automatic recovery after fault removal.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output power (stereo) | 160 W per channel into 4 Ω at 10% THD, 36 V supply - enables high-fidelity dual-channel speaker driving without external heat sinks under typical home audio loads. |
| Output power (mono BTL) | 220 W into 3 Ω at 10% THD, 36 V supply - supports single high-power subwoofer or PA driver with doubled voltage swing and current capability. |
| Supply voltage range | 14–36 V single supply - simplifies system power design by eliminating dual-rail supplies while maintaining headroom for dynamic peaks. |
| Efficiency | 85% typical - reduces thermal dissipation and PCB area vs. Class-AB, enabling compact enclosures and lower cooling costs. |
| Gain settings | 23.8 / 29.8 / 33.3 / 35.8 dB via GAIN pin voltage thresholds - allows precise sensitivity matching to line-level or preamp sources without external resistors. |
| Input structure | Differential inputs (INPA/INNA, INPB/INNB) with 69 kΩ impedance - rejects common-mode noise from long cables or noisy environments in active speaker installations. |
| Output offset | ±20 mV max - minimizes DC stress on passive crossover networks and speaker voice coils during startup/idle. |
| Switching frequency | 240–400 kHz (adjustable via ROSC) - places switching energy beyond audible band and eases EMI filter design with standard ferrite beads and small LC components. |
Pinout & Package
Package: PowerSSO-36 EPU (exposed pad up), thermally optimized with EP connected to ground for direct heatsink mounting; 10.1 × 7.5 mm body, 2.3 mm height, Rth j-case = 3.0 °C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 SUB_GND | Frame ground | Connects to chassis or enclosure frame to reduce mechanical vibration coupling and improve EMC stability. |
| 2,3 OUTPB / 8,9 OUTNB | Right channel PWM outputs | Drive complementary half-bridge outputs for BTL configuration; require external LC low-pass filtering before speaker connection. |
| 10,11 OUTNA / 16,17 OUTPA | Left channel PWM outputs | Identical to right channel outputs; paralleled with OUTPB/OUTNB in mono BTL mode when MODE = VDDS. |
| 18 PGND / 4,5 PGNDB / 14,15 PGNDA | Power stage ground | Low-inductance return path for high-current PWM switching; must be routed separately from signal ground (SGND) to avoid noise injection. |
| 19 VDDPW / 26 VDDS / 34 VREF / 35 SVCC / 36 VSS | Internal regulator outputs & supplies | VDDPW (3.3 V for power stage), VDDS (3.3 V for signal blocks), VREF (½ VDDS reference), SVCC (signal VCC), VSS (3.3 V referenced to PVCC) - enable clean biasing without external LDOs. |
| 20 STBY / 21 MUTE / 30 GAIN / 31 MODE | Digital control inputs | CMOS-compatible (0.8 V / 2.0 V thresholds); STBY enables full shutdown (1 µA IqSTBY), MUTE provides 75 dB attenuation, MODE selects stereo/mono BTL, GAIN sets closed-loop gain. |
| 22 INPA / 23 INNA / 32 INPB / 33 INNB | Differential analog inputs | Accept balanced line-level signals; common-mode rejection improves immunity to ground loops in multi-amplifier rack systems. |
| 24 ROSC / 25 SYNCLK / 28 DIAG / 29 SVR | Oscillator & diagnostics | ROSC sets internal oscillator frequency; SYNCLK synchronizes multiple devices; DIAG is open-drain fault indicator; SVR measures supply rejection for layout validation. |
Key Features
| Feature | Design Value |
|---|---|
| Parallel BTL mono mode | Enables 220 W into 3 Ω using both channels - eliminates need for separate mono amplifier IC in subwoofer or powered monitor designs. |
| Four-step programmable gain | 23.8–35.8 dB via single GAIN pin voltage - replaces discrete resistor networks and simplifies factory calibration of input sensitivity across product variants. |
| Integrated diagnostic output | Open-drain DIAG pin reports thermal overload, overcurrent, or UVLO faults - enables system-level LED alerts or microcontroller fault logging without additional sensors. |
| Smart protection suite | Auto-recovering thermal shutdown (140–160 °C), cycle-by-cycle overcurrent limit (10–14 A), and undervoltage lockout (~8 V) - prevents latch-up and catastrophic failure during abnormal operating conditions. |
| Exposed thermal pad (EP) | Direct thermal path from die to heatsink via soldered EP - achieves 3.0 °C/W junction-to-case resistance, enabling >150 W continuous output without forced air. |
| Differential input architecture | 69 kΩ input impedance with matched INPA/INNA and INPB/INNB pairs - suppresses RF interference and ground-borne noise in long-cable studio or live-sound applications. |
Applications
| Active Studio Monitor | Home Theater AV Receiver |
|---|---|
|
Use Scenario: Dual-channel bi-amplified near-field monitor with integrated DSP and analog inputs. IC Role / Device Role / Timing Role: Primary Class-D output stage for LF and HF drivers, driven by DAC+DSP signal chain; operates in stereo mode with independent gain and mute control per channel. Use Value: 160 W/channel into 4 Ω delivers clean transient response and low distortion (<0.05% THD at 1 W) for critical listening, while 20 mV offset avoids woofer displacement at idle. |
Use Scenario: High-power rear/surround channel amplifier in 7.1-channel AV receiver with auto-calibration. IC Role / Device Role / Timing Role: Stereo output stage for two surround channels; uses differential inputs to reject noise from adjacent HDMI/USB routing; MODE pin held low for independent operation. Use Value: 85% efficiency reduces thermal load in densely packed chassis; DIAG pin feeds system MCU for real-time thermal derating during extended movie playback. |
| Powered Subwoofer | Commercial PA Mixer Amplifier |
|
Use Scenario: Sealed or ported 12-inch subwoofer with built-in crossover and EQ. IC Role / Device Role / Timing Role: Mono BTL output stage configured via MODE = VDDS; both channels drive single voice coil in parallel; ROSC set for 310 kHz switching to minimize filter size. Use Value: 220 W into 3 Ω enables deep bass extension down to 25 Hz with minimal compression; SVR pin verifies supply stability during high-current transients. |
Use Scenario: 4-channel rack-mount amplifier for retail or hospitality background music distribution. IC Role / Device Role / Timing Role: One TDA7498ETR per 2-channel module; STBY controlled by RS-485 bus for remote power cycling; GAIN set to 29.8 dB to match mixer line output level. Use Value: Tape-and-reel packaging (TDA7498ETR) supports automated SMT assembly; exposed pad allows direct bolt-down to aluminum chassis for maintenance-free thermal management. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-channel Class-D audio amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TAS5634PHDR | 32-pin HTSSOP, 175 W + 175 W @ 4 Ω, 90% efficiency, no integrated VREF/VDDS regulators | Requires external 3.3 V LDOs for logic; lacks DIAG pin and SVR measurement capability | Preferred where higher efficiency and smaller footprint are prioritized over integrated biasing and diagnostics. |
| IRS2092SPBF | Hybrid driver + external MOSFETs, 200 W + 200 W, discrete gate drive, no integrated PWM modulator | Needs external gate drivers, bootstrap circuitry, and feedback compensation; higher BOM count and layout complexity | Chosen when ultimate thermal flexibility or custom FET selection (e.g., GaN) is required for specialized high-temp environments. |
Compared with TAS5634PHDR and IRS2092SPBF, the TDA7498ETR offers superior integration (on-chip regulators, diagnostics, gain control) and simplified thermal design (EPU package), trading off some peak efficiency and package density for faster time-to-market and reduced validation effort in mid-power active speaker platforms.
Availability
TDA7498ETR is available at Aetrix Electronics and suitable for active speaker development, home theater AV receivers, commercial PA systems, and powered subwoofer designs requiring stable component supply and long-term manufacturability.
Supply support for TDA7498ETR includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, designing and manufacturing analog, microcontroller, power, and sensor solutions for industrial, automotive, and consumer markets.
The TDA7498ETR belongs to ST's high-power audio amplifier product line, engineered specifically for cost-sensitive yet performance-demanding active speaker and home audio applications where integration, thermal robustness, and protection reliability are critical.
FAQ
What is the maximum safe operating supply voltage for TDA7498ETR?
The absolute maximum DC supply voltage (VCC) applied to PVCCA, PVCCB, and SVCC pins is 45 V, but recommended operation is limited to 14–39 V per datasheet Table 4. Exceeding 39 V risks premature thermal shutdown or accelerated degradation, especially above 70 °C ambient. For 220 W mono BTL operation, 36 V is the validated maximum for sustained output.
How does the MODE pin configure mono BTL operation?
The MODE pin selects stereo (default) or mono BTL mode: connect MODE to VDDS (3.3 V) to enable mono BTL, where both left and right channels drive the same load in parallel with inverted polarity; leave MODE unconnected or tied to SGND for stereo operation. Internal pull-down ensures default stereo behavior if MODE is floating.
Can TDA7498ETR operate without an external LC filter?
No - the TDA7498ETR requires an external second-order LC low-pass filter (e.g., 10 µH inductor + 100 nF capacitor per channel) between PWM outputs and speaker to suppress 240–400 kHz switching energy. Omitting the filter causes severe RF emission, speaker damage from high-frequency current, and audible whine due to ultrasonic content reaching the transducer.
What thermal interface material is recommended for the exposed pad?
A solderable thermal interface - such as Sn96.5/Ag3.0/Cu0.5 SAC305 paste - is required to attach the EP pad directly to a copper pour or heatsink baseplate. Thermal epoxy or gap pads are insufficient; the 3.0 °C/W Rth j-case rating assumes low-resistance metallic bonding. PCB layout must use ≥6 thermal vias (0.3 mm diameter, filled) under EP connecting to inner ground plane.
TDA7498ETR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- 36-PowerFSOP (0.295", 7.50mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Class D
- Output Type:
- 1-Channel (Mono) or 2-Channel (Stereo)
- Max Output Power x Channels @ Load:
- 220W x 1 @ 3Ohm; 160W x 2 @ 4Ohm
- Voltage - Supply:
- 14V ~ 36V
- Features:
- Differential Inputs, Mute, Short-Circuit and Thermal Protection, Standby
- Mounting Type:
- Surface Mount
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- PowerSSO-36 EPU
TDA7498ETR FAQ
1.How can I place an order for TDA7498ETR through Aetrix?
Please submit a Request for Quotation (RFQ) for TDA7498ETR on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for TDA7498ETR reliable?
The price and inventory of TDA7498ETR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TDA7498ETR is usually 5 days.
3.What payment methods are accepted for TDA7498ETR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TDA7498ETR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TDA7498ETR?
TDA7498ETR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TDA7498ETR order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for TDA7498ETR?
For technical support, including TDA7498ETR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TDA7498ETR requirements.
6.How does Aetrix verify that TDA7498ETR is sourced from the original manufacturer or authorized distributors?
All TDA7498ETR products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that TDA7498ETR meets industry standards.
7.What is the process for return or replacement of TDA7498ETR?
All TDA7498ETR units undergo pre-shipment inspection (PSI). If there is an issue with TDA7498ETR, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The TDA7498ETR part is unused and in its original packaging.
Return procedure for TDA7498ETR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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