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STMicroelectronics TDA7577LV
- Part No.:
- TDA7577LV
- Manufacturer:
- STMicroelectronics
- Category:
- Audio Amplifiers
- Package:
- 27-Flexiwatt, Formed Leads
- Datasheet:
-
TDA7577LV.pdf
- Description:
- IC AMP AB STEREO 45W 27FLEXIWATT
- Quantity:
- Payment:
- Shipping:
Inventory:4,398
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Product details
Overview
TDA7577LV from STMicroelectronics is a dual-channel Class SB MOSFET audio power amplifier designed for automotive head units, delivering 2 × 75 W into 2 Ω and 150 W in mono 1 Ω mode with I²C-controlled diagnostics, 6 V start-stop operation, and differential inputs.
For engineers reviewing the TDA7577LV datasheet, TDA7577LV pinout, TDA7577LV application, or TDA7577LV equivalent, this device supports high-efficiency audio amplification in battery-voltage-critical environments (e.g., engine cranking), real-time speaker fault detection, and flexible gain configuration (16/26 dB) without requiring external microcontroller coordination for basic mute/standby control.
Technical Context
The TDA7577LV implements a proprietary Class SB architecture combining high efficiency (up to 50% lower dissipation vs. Class AB) with low THD (0.03% typ. at 3 W, 2 Ω, Hi-Eff mode) and wide supply range (6–18 V). Its DMOS output stage enables stable 1 Ω load driving via parallel bridge configuration.
Integrated diagnostics include AC/DC load monitoring, dual independent short-circuit protection, programmable clipping detection (2%/10%), DC offset sensing, and I²C-reportable fault status across four configurable addresses-while retaining legacy ST-BY/MUTE pin control for backward compatibility.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Power | 2 × 75 W @ 2 Ω, 10% THD; 150 W mono @ 1 Ω - enables high-SPL rear/subwoofer channels in compact car audio systems |
| Supply Voltage Range | 6–18 V - supports full "start-stop" functionality during engine cranking down to 6 V without mute or reset |
| THD+N | 0.03% typ. @ 3 W, 2 Ω, Hi-Eff mode - preserves audio fidelity under high-efficiency operation |
| Gain Options | 16 dB / 26 dB - selectable via I²C or pin strapping for optimal signal-to-noise ratio across source types |
| I²C Interface | 4 configurable slave addresses - allows daisy-chaining multiple TDA7577LV devices on one bus for multi-zone audio systems |
| Diagnostic Coverage | Detects open/short loads, DC offset, clipping, and thermal faults - eliminates need for external sense resistors or ADC monitoring |
| Quiescent Current | 140–200 mA @ 14.4 V - balances low standby consumption with fast wake-up response for infotainment systems |
Pinout & Package
Available in PowerSO-36 (slug-up) and Flexiwatt27 variants (vertical/horizontal/SMD); thermal resistance junction-to-case is 1 °C/W in both packages, enabling high-power operation with moderate heatsinking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC | Power supply input | Accepts 6–18 V; supports transient operation down to 6 V for start-stop compliance |
| OUT1+/OUT1−, OUT2+/OUT2− | Dual bridge outputs | Differential drive capability; paralleled for 1 Ω mono mode with external jumper |
| ST-BY | Standby control | Three-level logic: 0–1.2 V = standby, 2.6–5 V = standard bridge, 7–18 V = Hi-Eff mode |
| MUTE | Mute control | 0–1 V = muted (≥80 dB attenuation), 2.6–18 V = active - independent of ST-BY state |
| CLIP | Clipping indicator | Open-drain output asserting low when THD exceeds programmed threshold (2% or 10%) |
| SCL/SDA | I²C interface | Supports 400 kHz Fast Mode; 4 address options via A/B pins - enables system-level diagnostics without CPU polling |
| 1Ω | Mode selection | 0–1.5 V = dual-channel; ≥2.5 V = mono 1 Ω mode - configures internal current-sense thresholds |
| IN1+/IN1−, IN2+/IN2− | Differential audio inputs | 100 kΩ input impedance; rejects common-mode noise from long harness runs in vehicle cabins |
Key Features
| Feature | Design Value |
|---|---|
| Class SB Output Stage | Reduces power dissipation by up to 50% vs. Class AB at same output power - lowers thermal design burden in sealed head unit enclosures |
| Full I²C Diagnostics | Reports per-channel open/short, clipping, DC offset, and thermal faults over bus - replaces discrete fault-monitoring circuitry |
| Start-Stop Compatible Operation | Stable operation at 6 V supply - maintains audio continuity during engine restart without muting or brown-out recovery delay |
| Dual Short-Circuit Protection | Independent detection on each half-bridge - prevents latch-up during speaker wire miswiring or connector shorts |
| Programmable Clipping Threshold | Selectable 2% or 10% THD trigger - allows optimization between dynamic range preservation and speaker protection |
| Legacy Pin Control | Full functionality retained using only ST-BY/MUTE pins - simplifies migration from non-I²C amplifiers without firmware changes |
Applications
| Automotive Head Unit | Aftermarket Stereo System |
|---|---|
Use Scenario: OEM-grade infotainment system with multi-zone audio routing and voice prompt feedback. IC Role / Device Role / Timing Role: Dual-channel amplifier driving front/rear speakers with real-time diagnostic reporting to MCU over I²C. Use Value: Eliminates need for external current-sense amplifiers and discrete fault logic, reducing BOM count and PCB area by >12 components. |
Use Scenario: High-power aftermarket receiver supporting subwoofer pre-outs and zone expansion. IC Role / Device Role / Timing Role: Primary power stage enabling 150 W mono output to subwoofer via 1 Ω parallel mode with integrated clipping detection. Use Value: Delivers clean bass extension down to 20 Hz without external thermal shutdown circuits, thanks to embedded DC offset and thermal monitoring. |
| Start-Stop Enabled Navigation Audio | Compact Vehicle Infotainment |
Use Scenario: Navigation-guided turn-by-turn prompts requiring uninterrupted audio during engine cranking events. IC Role / Device Role / Timing Role: Low-voltage-stable amplifier maintaining 6 V operation while suppressing pop/click during battery transitions. Use Value: Achieves <±7.5 mV ITU-R pop voltage during mute/play transitions - meets OEM acoustic comfort requirements without external RC filters. |
Use Scenario: Space-constrained dashboard display with integrated audio processing and Bluetooth streaming. IC Role / Device Role / Timing Role: Dual-bridge driver handling both main speakers and tweeters with differential input rejection of EMI from display backlight drivers. Use Value: 70 dB CMRR at 1 kHz ensures voice clarity despite proximity to noisy digital subsystems, eliminating need for shielded input cabling. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-bridge automotive amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TDA7388 | Lacks I²C diagnostics and 1 Ω capability; max 2 × 41 W @ 4 Ω; no start-stop support below 8 V | Suitable for cost-sensitive entry-level radios without advanced fault reporting or low-voltage operation | Choose when diagnostic granularity and 6 V operation are not required, and thermal budget permits higher dissipation. |
| MAX9768 | I²C diagnostics present but no 1 Ω mode; 2 × 50 W @ 2 Ω; THD 0.05% typ.; requires external boost for <9 V operation | Used in premium portable audio systems where board space is constrained and efficiency less critical than feature density | Prefer when footprint minimization (QFN32) outweighs raw power and native start-stop capability. |
Compared with TDA7577LV, TDA7388 offers lower integration and reduced low-voltage robustness, while MAX9768 trades off peak power and native 6 V operation for smaller package size and higher integration density-making TDA7577LV optimal for high-fidelity, start-stop-compliant automotive amplification.
Availability
TDA7577LV is available at Aetrix Electronics and suitable for automotive infotainment systems, start-stop-enabled navigation audio, and compact vehicle infotainment platforms requiring stable component supply across extended temperature ranges and lifecycle volatility.
Supply support for TDA7577LV 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, specializing in automotive, industrial, and power management ICs with broad manufacturing scale and AEC-Q100 qualification expertise.
The TDA7577LV belongs to ST's TDA7xxx automotive audio amplifier family, engineered specifically for high-efficiency, diagnostic-rich, start-stop-compatible head unit designs in modern vehicles.
FAQ
What is the minimum supply voltage for continuous operation?
The TDA7577LV operates continuously down to 6 V, meeting OEM "start-stop" requirements during engine cranking. Below 6 V, the device enters undervoltage lockout; recovery occurs automatically once supply rises above 6.2 V with hysteresis. No external brown-out circuitry is needed.
How does the 1 Ω mono mode function electrically?
When the 1Ω pin is driven ≥2.5 V, internal current-sense thresholds double and output stages are configured for parallel operation. This enables 150 W into 1 Ω with matched channel biasing and shared thermal monitoring-verified per Figure 7 and Section 5 of the datasheet.
Can I use the TDA7577LV without I²C communication?
Yes. The device supports full legacy operation using only ST-BY and MUTE pins for power sequencing and muting. I²C is optional for diagnostics and advanced configuration; all safety features (clipping detect, short-circuit protection, DC offset) remain fully active in pin-control mode.
What thermal management is required for 2 × 75 W output?
At 2 × 75 W into 2 Ω, junction temperature must stay ≤150 °C. With Rth(j-case) = 1 °C/W, a heatsink with ≤2.5 °C/W total thermal resistance (including interface) is required at 70 °C case temperature. ST recommends copper-clad PCB areas ≥10 cm² plus external finned heatsink for sustained output.
TDA7577LV Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- 27-Flexiwatt, Formed Leads
- Packaging:
- Tube
- Product Status:
- Active
- Type:
- Class AB
- Output Type:
- 2-Channel (Stereo)
- Max Output Power x Channels @ Load:
- 45W x 2 @ 4Ohm
- Voltage - Supply:
- 6V ~ 18V
- Features:
- Mute, Short-Circuit Protection, Standby
- Mounting Type:
- Through Hole
- Operating Temperature:
- -40°C ~ 105°C (TA)
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 27-Flexiwatt (Vertical)
TDA7577LV FAQ
1.How can I place an order for TDA7577LV through Aetrix?
Please submit a Request for Quotation (RFQ) for TDA7577LV 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 TDA7577LV reliable?
The price and inventory of TDA7577LV are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TDA7577LV is usually 5 days.
3.What payment methods are accepted for TDA7577LV?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TDA7577LV transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TDA7577LV?
TDA7577LV orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TDA7577LV 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 TDA7577LV?
For technical support, including TDA7577LV datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TDA7577LV requirements.
6.How does Aetrix verify that TDA7577LV is sourced from the original manufacturer or authorized distributors?
All TDA7577LV 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 TDA7577LV meets industry standards.
7.What is the process for return or replacement of TDA7577LV?
All TDA7577LV units undergo pre-shipment inspection (PSI). If there is an issue with TDA7577LV, 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 TDA7577LV part is unused and in its original packaging.
Return procedure for TDA7577LV:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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