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Home > Products > Integrated Circuits (ICs) > Linear > Audio Amplifiers

STMicroelectronics STA50513TR

Name: STA50513TR
Brand: STMicroelectronics
SKU: STA50513TR
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: STA50513TR

Manufacturer:: STMicroelectronics

Category:: Audio Amplifiers

Package:: PowerSO-36 Exposed Top Pad

Datasheet:: STA50513TR.pdf

Description:: IC AMP D MONO/STER 50W PWRSO-36

Quantity:: RFQ Add To RFQ list

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Inventory:2,435

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Product details

Overview

STA50513TR from STMicroelectronics is a monolithic quad half-bridge power stage in MultiPower BCD technology, designed as the output stage for stereo All-Digital High Efficiency (DDX™) audio amplifiers. It delivers 50 + 50W @ THD = 10% into 8Ω at V_CC = 30V (dual BTL), or 80W @ THD = 10% into 8Ω at V_CC = 36V (single BTL), with 200 mΩ R_ds(on), thermal warning output, and under-voltage protection.

For engineers reviewing the STA50513TR datasheet, STA50513TR pinout, STA50513TR application, or STA50513TR equivalent, this device supports reconfigurable bridge modes (dual, single BTL, or half-bridge binary), features CMOS-compatible logic inputs with VL-referenced thresholds, and integrates thermal shutdown (150°C), fault reporting, and tri-state control for system-level power management.

Technical Context

The STA50513TR implements four independent half-bridge stages using complementary DMOS transistors, each with matched P/N-channel R_ds(on) (95% matching) and low dead-time control (10 ns static, 50 ns dynamic). Its CONFIG pin enables mode reconfiguration: tied to V_dd, it merges channels into a single high-current BTL stage (80W) or halves current for binary half-bridge operation.

Logic inputs (IN1A/IN1B/IN2A/IN2B) are referenced to VL voltage (2.7–5 V range), enabling adaptive thresholding; protection circuitry includes undervoltage lockout (7 V), thermal warning at 130°C, and fault latching with open-collector FAULT output. The integrated 5 V regulator (V_dd) supplies internal logic and accepts input from V_cc via V_ss.

Key Specifications

Parameter	Value and Actual Design Meaning
R_ds(on)	200 mΩ typical - enables high-efficiency switching with ≤3.5 A continuous output per half-bridge
Output Power	50 + 50 W @ 30 V / 8 Ω (dual BTL); 80 W @ 36 V / 8 Ω (single BTL) - verified at 10% THD
Thermal Warning	130 °C activation - provides early overtemperature alert before 150 °C shutdown
V_CC Range	10–36 V - supports wide-range DC bus operation including automotive 24 V and industrial 36 V rails
Input Logic Threshold	V_L/2 ± 300 mV - ensures noise-immune switching across 2.7–5 V VL reference
Short-Circuit Current Limit	3.5–8 A - protects against load faults while maintaining drive capability
Dead Time	10 ns (static), 50 ns (dynamic) - prevents shoot-through during high-current switching transitions

Pinout & Package

STA50513TR uses PowerSO36 (slug-up) package with exposed thermal pad for enhanced heat dissipation (R_th(j-c) = 2.5 °C/W). Pin count: 36. Thermal pad soldered to PCB ground plane is mandatory for safe operation at rated power.

Pin/Terminal	Circuit Role	Design Meaning
1, 5, 6, 13, 14, 19, 20, 34	GND variants (SUB, 1A, 1B, 2A, 2B, clean, Reg, VSS)	Dedicated ground paths isolate power, logic, and regulation domains to suppress noise coupling
2–4, 7–9, 10–12, 15–17, 35–36	OUTxY / VCCxY / GNDxY	Four independent half-bridge terminals (OUT1A/VCC1A/GND1A etc.) - enable flexible PCB layout per channel
21–22, 29–32	V_dd, VL, IN1A–IN2B	CMOS-compatible logic interface with VL-referenced thresholds - allows direct connection to DSP/PWM modulators
23–28, 30, 33	CONFIG, PWRDN, TRI-STATE, FAULT, TH_WAR, VCCSIGN	System control and monitoring: CONFIG selects bridge topology; FAULT/TH_WAR are open-collector alerts requiring pull-up resistors

Key Features

Feature	Design Value
Reconfigurable Bridge Topology	Single BTL (80 W), dual BTL (50+50 W), or half-bridge binary mode - selected via CONFIG pin connection
Thermal Protection Architecture	Two-stage response: TH_WAR at 130 °C (warning), thermal shutdown at 150 °C with 25 °C hysteresis
Low-Pulse-Width Distortion	Minimum input-output pulse width distortion ensures accurate PWM reproduction for DDX™ digital amplification
Integrated 5 V Regulator	V_dd output referenced to both GND-Reg and V_ss - powers internal logic without external LDO
Undervoltage Lockout	7 V threshold prevents erratic operation during brown-out or startup - ensures clean enable sequencing

Applications

Home Audio Amplifiers

Automotive Infotainment Systems

Use Scenario: Stereo Class-D amplifier module delivering 50 W per channel into 8 Ω speakers in compact AV receivers.

IC Role / Device Role / Timing Role: Quad half-bridge output stage driving LC-filtered BTL outputs; receives PWM input from STA30x series modulator.

Use Value: Enables 90%+ efficiency and <10% THD at full power without heatsink bulk, reducing system size and thermal design complexity.

Use Scenario: Rear-seat entertainment amplifier powering 4 Ω speakers in 24 V vehicle electrical architecture.

IC Role / Device Role / Timing Role: Dual BTL configuration with V_CC = 27–36 V operation; CONFIG pin fixed for dual mode; TH_WAR feeds vehicle ECU for thermal derating.

Use Value: Sustains 50 W/channel into 4 Ω loads with built-in UVLO (7 V) and fault reporting - meets automotive cold-crank and load-dump robustness requirements.

Professional Audio Reference Designs

Industrial Sound Reinforcement

Use Scenario: Evaluation platform for DDX™ digital amplifier architecture using STA309 + STA50513TR demo board.

IC Role / Device Role / Timing Role: Output stage synchronized to 384 kHz PWM carrier; low dead time preserves modulation fidelity for high-SNR audio reproduction.

Use Value: Delivers measured 80 W single-BTL output at 10% THD - validates system-level performance before custom PCB spin.

Use Scenario: Fixed-installation PA amplifier driving distributed 70 V line speakers via external step-up transformer.

IC Role / Device Role / Timing Role: Single BTL mode (CONFIG = 1) with V_CC = 36 V; PWRDN and TRI-STATE used for remote mute and standby sequencing.

Use Value: Supports scheduled power cycling and thermal-aware volume ramping via FAULT/TH_WAR signals - improves reliability in unattended operation.

Equivalent & Alternatives

The following parts are listed as comparable options for similar quad half-bridge power stage applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
TAS5630PHDR	Higher R_ds(on) (300 mΩ), no thermal warning pin, integrated bootstrap diodes	Requires external bootstrap capacitors; lacks TH_WAR for predictive thermal management	Prefer when board space is constrained and thermal margin is >20 °C above ambient
IRS2092SPBF	Standalone gate driver (no power MOSFETs), requires external FETs and bootstrap network	Greater flexibility in FET selection but increases BOM count and layout complexity	Choose when discrete FET optimization (e.g., SiC, GaN) or >100 W/channel is required

Compared with TAS5630PHDR and IRS2092SPBF, STA50513TR offers integrated DMOS output stages with guaranteed R_ds(on) matching, on-chip thermal warning, and seamless DDX™ compatibility - reducing design risk for mid-power digital audio systems where integration and predictability outweigh component-level customization.

Availability

STA50513TR is available at Aetrix Electronics and suitable for home audio amplifiers, automotive infotainment systems, and professional audio reference designs requiring stable component supply and long-term lifecycle support.

Supply support for STA50513TR 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, specializing in analog, power, microcontrollers, and automotive ICs.

The STA505 belongs to ST's DDX™ digital audio power stage product line, engineered specifically for high-efficiency, low-THD Class-D amplification in consumer and professional audio systems with minimal external components.

FAQ

What is the function of the CONFIG pin on STA50513TR?

The CONFIG pin selects operating mode: grounded for standard quad half-bridge operation; tied to V_dd (pins 21/22) to configure as single high-current BTL stage (80 W) or half-bridge binary mode. Mode selection alters internal signal routing and current sharing - no external logic is required beyond the pin connection.

How does the thermal warning (TH_WAR) output behave?

TH_WAR is an open-collector output that pulls low at 130 °C junction temperature and releases (high-impedance) when temperature falls below 105 °C (130 °C – 25 °C hysteresis). It requires an external pull-up resistor (e.g., 10 kΩ to 3.3 V) and can drive MCU interrupt inputs for proactive thermal throttling before shutdown.

Can STA50513TR operate with 24 V supply in automotive applications?

Yes - STA50513TR supports V_CC from 10 V to 36 V, covering automotive 12 V nominal (10–16 V) and 24 V nominal (20–28 V) ranges. Its 7 V undervoltage lockout prevents operation during cold-crank (down to ~6.5 V), and thermal protection ensures reliability under hood temperatures up to 90 °C ambient.

What is the purpose of multiple ground pins (GND1A, GND1B, GNDSUB, etc.)?

Each ground pin serves a dedicated domain: GND1A/GND1B carry high-frequency switching currents for half-bridge 1; GNDSUB connects to the exposed thermal slug; GND-Clean isolates analog logic; GND-Reg grounds the internal 5 V regulator. Separating these paths minimizes ground bounce and prevents noise coupling between power, logic, and regulation circuits.

STA50513TR Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: -

Package/Case:: PowerSO-36 Exposed Top Pad

Packaging:: Tape & Reel (TR)

Product Status:: Obsolete

Type:: Class D

Output Type:: 1-Channel (Mono) or 2-Channel (Stereo)

Max Output Power x Channels @ Load:: 50W x 2 @ 8Ohm, 80W x 1 @ 8Ohm

Voltage - Supply:: 10V ~ 36V

Features:: Thermal Shutdown Protection

Mounting Type:: Surface Mount

Operating Temperature:: -40°C ~ 90°C (TA)

Grade:: -

Qualification:: -

Supplier Device Package:: PowerSO-36

STA50513TR FAQ

1.How can I place an order for STA50513TR through Aetrix?

Please submit a Request for Quotation (RFQ) for STA50513TR 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 STA50513TR reliable?

The price and inventory of STA50513TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STA50513TR is usually 5 days.

3.What payment methods are accepted for STA50513TR?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STA50513TR transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for STA50513TR?

STA50513TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your STA50513TR 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 STA50513TR?

For technical support, including STA50513TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STA50513TR requirements.

6.How does Aetrix verify that STA50513TR is sourced from the original manufacturer or authorized distributors?

All STA50513TR 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 STA50513TR meets industry standards.

7.What is the process for return or replacement of STA50513TR?

All STA50513TR units undergo pre-shipment inspection (PSI). If there is an issue with STA50513TR, 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 STA50513TR part is unused and in its original packaging.

Return procedure for STA50513TR:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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