STA501013TR - 40V 3.5A Class D Half-Bridge | STMicroelectronics
Référence : STA501013TR ✓ ActifSTA501013TR Présentation
A Class D half-bridge amplifier is a switching power amplifier that uses pulse-width modulation to drive an output stage efficiently. A half-bridge contains two coordinated switching paths rather than the complete output network required for a full bridge. In motor, audio, and transducer applications, this topology provides high current drive with lower conduction loss than a linear output stage, although output filtering and careful layout remain important.
Key device characteristics include a 40 V maximum rating, 3.5 A output-current capability, 200 mΩ MOSFET on-resistance, CMOS-compatible control inputs, and integrated thermal and under-voltage protection. The PowerSO-36 package provides 36 terminals and supports surface-mount assembly. The complementary DMOS architecture alternates current between the two switching devices, while the thermal warning output gives the host system an early indication that operating conditions are approaching the device’s thermal limit.
The STA501013TR is identified as a one-channel mono Class D amplifier. Its switching output must be connected through an appropriate LC output-filter network when driving a loudspeaker or other inductive load. The filter suppresses the high-frequency switching energy inherent to Class D operation and should be selected using the actual switching frequency, load impedance, attenuation requirement, and permissible group delay for the target system.
Typical uses include compact audio amplifiers, powered speakers, subwoofer amplification, motor and actuator drivers, and other load systems that need efficient high-current drive. Thermal design is especially important because Class D efficiency still does not eliminate all output-stage loss. The PCB copper area, exposed thermal interface, ambient temperature, switching frequency, output current, and load determine junction temperature, so a production design should reproduce the worst-case audio or motor duty cycle rather than rely on a no-load calculation.
For PCB implementation, place the high-current output paths compactly and use wide copper conductors to minimize parasitic resistance and inductance. Keep the switching node small, connect the output filter close to the amplifier pins, and provide low-impedance supply decoupling. The manufacturer datasheet should be used to assign all 36 terminals and configure the IN, PWM or logic-control, bootstrap, ground, power, protection, and diagnostic connections exactly as specified for the selected topology.
This page consolidates the verified electrical ratings, protection features, application guidance, sourcing workflow, and design considerations for engineers evaluating the STA501013TR. It also distinguishes documented device characteristics from parameters that require confirmation from the full manufacturer datasheet before schematic release or production qualification.
Alternatives de remplacement direct pour STA501013TR — même boîtier, compatible broche à broche. Les références à boîtier différent nécessitant une retouche du PCB sont exclues.
Aucune alternative de remplacement direct disponible pour ce produit.
Demander des alternativesSTA501013TR Valeurs maximales et caractéristiques électriques
| Product Type | Mono Class D power half-bridge amplifier IC |
| Maximum Supply Voltage | 40 V |
| Output Current | 3.5 A |
| Rated Power Output | 50 W into 8 ohm |
| Output Stage | Complementary DMOS |
| MOSFET On-Resistance | 200 mΩ |
| Logic Input Compatibility | CMOS-compatible |
| Protection Functions | Thermal protection, thermal warning, and under-voltage protection |
| Number of Channels | 1 channel (mono) |
| Boîtier | PowerSO-36 |
| Terminal Count | 36 terminals |
| Type de montage | Surface mount |
| Temperature Grade | Commercial |
Guide de configuration des broches du STA501013TR powerso-36
Configuration des broches du STA501013TR (boîtier powerso-36). Ce composant analogique comporte des broches d'entrée, de sortie et d'alimentation. Consultez la fiche technique du fabricant pour les configurations des broches d'annulation d'offset, de compensation et d'activation. Idéal pour le conditionnement de signaux et les circuits amplificateurs.
Aucune donnée de brochage détaillée disponible pour STA501013TR.
Consultez la fiche technique pour la configuration complète des broches.
Applications typiques
STA501013TR convient pour 6 applications: Compact Subwoofer Amplifier, Powered Speaker Module, Motor and Actuator Driver, USB-C Powered Loudspeaker, Portable Audio Amplifier, Industrial Audio and Annunciator Driver.
Compact Subwoofer Amplifier
The STA501013TR suits a compact subwoofer power stage because its Class D half-bridge architecture provides a documented output capability of 50 W into 8 ohms while using a 3.5 A-class output device. The mono configuration maps naturally to a single speaker channel and can be duplicated for stereo or multi-channel installations. Its CMOS-compatible logic inputs simplify connection to a digital audio controller, while the thermal warning output supports supervisory shutdown. The PowerSO-36 package still requires substantial PCB copper and a correctly designed LC output filter to remove switching energy before it reaches the loudspeaker.
Powered Speaker Module
A powered speaker can place the STA501013TR between its digital audio source and an 8-ohm driver, using the device’s 50 W into 8 ohms capability as the central output stage. The Class D topology is valuable in portable or space-constrained enclosures because it reduces the heat generated by a comparable linear output stage. Use the half-bridge’s control interface and under-voltage function to supervise startup, and route the thermal warning to the system controller. Output filtering, copper heat spreading, and continuous-load testing remain essential for reliable audio reproduction.
Motor and Actuator Driver
The STA501013TR can serve as a switching driver for a motor, actuator, or other inductive load when its 40 V, 3.5 A device ratings satisfy the load requirements. The complementary DMOS half-bridge provides bidirectional current paths suitable for H-bridge-style control arrangements when combined with another channel. Because inductive energy can raise the switching node beyond the nominal rail, designers must evaluate clamp paths, current limits, duty cycle, and thermal rise. The manufacturer application information should guide output filtering and protection around the selected motor topology.
USB-C Powered Loudspeaker
The STA501013TR can be used in a USB-C powered speaker when the available supply and thermal conditions support the required output level. CMOS-compatible control signals simplify interfacing with the digital audio section, while the thermal warning function can report excessive dissipation to the host controller. The 40 V class rating provides headroom above a typical low-voltage bus, but the actual operating range must be confirmed. Designers should use the under-voltage protection to avoid startup behavior outside the intended supply conditions and must preserve the recommended decoupling and output-filter layout.
Portable Audio Amplifier
A portable audio product benefits from the STA501013TR when low-voltage operation and battery constraints make conduction efficiency important. The device’s Class D half-bridge reduces output-stage dissipation compared with a linear amplifier, while its documented 3.5 A rating and 200 mΩ MOSFET on-resistance establish a useful basis for load-current analysis. Actual battery life depends on switching frequency, output level, filter losses, and quiescent consumption, which should be measured in the finished design. A compact PowerSO-36 layout can reduce board area, although thermal copper must not be sacrificed.
Industrial Audio and Annunciator Driver
The STA501013TR is suitable for industrial audio modules, alarms, and annunciators that require more current than a logic-level audio amplifier can provide. Its mono Class D output can drive an 8-ohm transducer at the manufacturer’s listed 50 W condition when cooling permits, and its protection features support robust end-product behavior. Industrial enclosures may be hot, so the thermal budget should be calculated at the highest sustained operating temperature. The host system can use the thermal warning signal to reduce volume, mute the channel, or initiate a controlled shutdown before the output stage overheats.
Données de référence d'ingénierie pour STA501013TR — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Comparaison avec les alternatives
| Paramètre | Ce produit |
|---|---|
| Brand | STMicroelectronics |
| Package | PowerSO-36 |
| Maximum Supply Voltage | 40 V |
| Output Current | 3.5 A |
| Rated Power Output | 50 W into 8 ohm |
| Output Stage | Complementary DMOS |
| MOSFET On-Resistance | 200 mΩ |
| Logic Input Compatibility | CMOS-compatible |
| Protection Functions | Thermal protection, thermal warning, and under-voltage protection |
| Channel Architecture | Mono Class D half-bridge |
Principaux différenciateurs
- Documented high-power mono half-bridge capability (vs STA510A13TR)
- Integrated system-level protection features (vs STA510A13TR)
- CMOS-compatible control interface (vs STA510A13TR)
Notes de conception
Calculate worst-case junction temperature from the actual continuous dissipation, ambient temperature, and PCB copper area rather than from the 3.5 A output-current limit alone. PowerSO-36 performance depends on the thermal pad, solder assembly, board copper, and airflow. Reproduce the maximum expected load duration, monitor the thermal warning output, and reduce drive or load before protection is reached.
Use short, wide copper paths for supply and output current, with low-impedance decoupling placed close to the relevant device pins. Keep the switching node compact to limit electromagnetic radiation and voltage transients. Connect the exposed thermal interface to a substantial copper plane according to the manufacturer layout guidance, and avoid placing temperature-sensitive analog circuitry directly beneath the switching stage.
Do not treat the 40 V maximum rating as the guaranteed operating range, and do not assume the 3.5 A rating permits continuous operation at every permitted voltage and temperature. Confirm the recommended operating conditions, under-voltage threshold, input pulse-width limits, output distortion, and pin states in the manufacturer datasheet. These parameters are especially important when driving inductive loads or designing automotive-grade equipment.
Install the recommended output filter as close as practical to the power-output pins and select filter components with ratings appropriate for the switching current. Keep the unfiltered switching node small, maintain a compact ground-return path, and avoid routing sensitive audio or sensor signals beneath the half-bridge. Validate conducted and radiated emissions because a Class D output can couple switching energy into adjacent circuits.
Size the supply path for the half-bridge’s peak current and switching transients rather than its nominal load power alone. Place bulk energy storage close enough to the amplifier to support local current demand, while retaining the manufacturer’s recommended ceramic bypass capacitors. Under-voltage protection can help during startup, but the system must also prevent unintended operation above the safe operating range.
Informations de conformité
The available product information does not explicitly state RoHS, REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals status. The device is identified as commercial temperature grade, but that designation does not establish automotive qualification.