OPA548T - High-Voltage Power Op Amp | Texas Instruments
Référence : OPA548T ✓ ActifOPA548T Présentation
An operational amplifier is a voltage-gain and signal-conditioning component used in the amplifier IC category to amplify, buffer, filter, or control analog signals. Power operational amplifiers extend that hierarchy into high-current or high-voltage drive functions, where the output stage must deliver more energy than a conventional low-power op amp. OPA548T therefore belongs to the power management and analog signal-chain ecosystem rather than serving as a precision instrumentation amplifier.
Key verified attributes include a 1 MHz gain-bandwidth product, 10 V/µs slew rate, operation from positive or negative supplies between ±4 V and ±30 V, and a 7-pin TO-220 package. The manufacturer describes the device as a low-cost, high-voltage, high-current amplifier intended to drive a wide variety of loads. Its monolithic laser-trimmed construction supports accurate low-level signal behavior while the power output stage provides high output voltage and current capability.
OPA548T uses thermal-shutdown and current-overload protection. Its E/S pin can be monitored to determine whether the amplifier has entered thermal shutdown, providing a useful system-level status indication. The device also provides a user-selected current-limit function. These protections are important in power stages where load transients, wiring faults, or motor behavior could otherwise force the amplifier outside its intended operating condition.
Typical uses include audio power stages, motor and solenoid drivers, industrial actuator interfaces, loudspeaker systems, and high-voltage analog signal conditioning. The broad supply range permits dual-supply operation up to ±30 V and lower-voltage systems down to ±4 V. Designers must select the output current and thermal limits appropriate to the load rather than treating the amplifier as an unrestricted output stage.
The primary design consideration is thermal management. A 7-lead TO-220 package is intended to transfer heat through its tab to a heatsink or substantial copper area. Input, feedback, supply-decoupling, and output-return layout should follow the manufacturer application guidance, and output-current protection should not replace a properly designed thermal path.
This page combines verified manufacturer and distributor information, drop-in ordering variants, application guidance, and engineering-focused comparison data. It also clearly identifies pricing and package-drawing gaps where the supplied source material does not provide verified values, helping engineers distinguish documented facts from design-dependent assumptions.
Alternatives de remplacement direct pour OPA548T — même boîtier, compatible broche à broche. Les références à boîtier différent nécessitant une retouche du PCB sont exclues.
Variantes de cette série
Modèles de la même série directement compatibles avec OPA548T (même facteur de forme et même empreinte) — différant par Package, Gain-Bandwidth Product, Mounting Type, Operating Temperature Range, Slew Rate.
OPA548T-1
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
OPA548T-2
✅ Remplacement direct ⚠️ Spécifications non vérifiées📋 Alternative de référence (hors catalogue)
OPA548T-3
✅ Remplacement direct ⚠️ Spécifications non vérifiées📋 Alternative de référence (hors catalogue)
OPA548T-4
✅ Remplacement direct ⚠️ Spécifications non vérifiées📋 Alternative de référence (hors catalogue)
OPA548T-5
✅ Remplacement direct ⚠️ Spécifications non vérifiées📋 Alternative de référence (hors catalogue)
OPA548T Valeurs maximales et caractéristiques électriques
| Amplifier Type | Single power operational amplifier |
| Number of Circuits | 1 circuit |
| Gain-Bandwidth Product | 1 MHz |
| Slew Rate | 10 V/µs |
| Supply Voltage Range | ±4 V to ±30 V |
| Boîtier | 7-lead TO-220 |
| Nombre de broches | 7 pins |
| Type de montage | Through-hole power package |
| Slew Rate | 10 V/µs |
| Arrêt thermique | Internally protected |
| Current Overload Protection | Internally protected |
| E/S Status Pin | Output can be monitored for thermal-shutdown status |
| Limitation de courant | User-selectable |
Guide de configuration des broches du OPA548T 7-lead to-220
Configuration des broches du OPA548T (boîtier 7-lead to-220). 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 OPA548T.
Consultez la fiche technique pour la configuration complète des broches.
Applications typiques
OPA548T convient pour 6 applications: High-Power Audio Amplifier, Motor Drive Interface, Solenoid and Relay Driver, Industrial Actuator Signal Conditioning, Instrumentation Output Buffer, Test and Measurement Output Driver.
High-Power Audio Amplifier
OPA548T fits a high-power audio output stage because it combines a 10 V/µs slew rate with operation across ±4 V to ±30 V supplies. These characteristics allow the device to follow larger signal swings without the slow edge rates associated with many low-power op amps. The 7-lead TO-220 package also provides a direct path for heat removal through its tab. In a practical amplifier, feedback components set the closed-loop gain while the OPA548T supplies current to the speaker or line-stage load. The design must still verify output-current capability, safe operating area, crossover distortion, and thermal rise for the selected load.
Recommandé
Motor Drive Interface
OPA548T can serve as a current-capable interface stage in a motor-control circuit because it is specified as a high-voltage, high-current operational amplifier. Its ±4 V to ±30 V supply range is useful for systems operating above conventional ±5 V or ±12 V levels, while the 10 V/µs slew rate supports control-signal transitions. The exact output-current and safe-operating-area limits must be checked for the motor winding. Flyback diodes or another inductive-clamp method are also required because motor current and back-EMF can exceed the amplifier's ordinary output behavior.
Recommandé
Solenoid and Relay Driver
OPA548T is suited to solenoid-driver interfaces where the control system must convert a low-level command into a higher-current output. The verified ±4 V to ±30 V operating range permits compatibility with widely separated positive and negative supply rails, and the current-limit and thermal-shutdown features provide system-level protection functions. Designers should configure the user-selectable current limit according to the winding resistance, startup current, and allowable duty cycle. A flyback clamp is normally required across an inductive load to limit voltage excursions, while the TO-220 tab must be connected to an adequate thermal path.
Recommandé
Industrial Actuator Signal Conditioning
OPA548T can condition and amplify actuator-control signals in industrial equipment requiring a wider output swing than a standard precision op amp provides. Its 1 MHz gain-bandwidth product supports signal bandwidth below that limit, while the 10 V/µs slew rate improves response to amplitude changes. The device's user-selectable current limit and E/S thermal-status output are valuable when monitoring a remote actuator stage. The surrounding system must account for EMI, long analog routes, grounding, output stability, and load transients, and must verify that the amplifier's maximum supply and output ratings remain acceptable under worst-case industrial conditions.
Recommandé
Instrumentation Output Buffer
OPA548T can provide a high-current output buffer when a measurement front end needs to drive a lower-impedance instrument or subsequent analog stage. The 1 MHz gain-bandwidth product is suitable for moderate-bandwidth measurement signals, and the 10 V/µs slew rate helps preserve amplitude accuracy during transitions. Compared with a conventional precision op amp, the OPA548T offers substantially more drive capability but also demands more careful thermal and stability analysis. Feedback compensation, output isolation, grounding, and decoupling must be designed around the selected load, with the E/S pin optionally used to report thermal-shutdown status.
Recommandé
Test and Measurement Output Driver
OPA548T is applicable in test and measurement equipment that must generate or buffer analog signals into a relatively demanding load. Its ±4 V to ±30 V supply flexibility permits operation at different signal amplitudes, and the 10 V/µs slew rate supports rapid waveform transitions. The 7-lead TO-220 package allows the output stage to be thermally managed with a dedicated heat path. In an instrument design, the amplifier should be configured for stable closed-loop operation, and the output must be checked for capacitive loading and safe current limits. The E/S status output can support fault monitoring when thermal shutdown becomes a concern.
Recommandé
Récapitulatif des produits recommandés
Données de référence d'ingénierie pour OPA548T — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
OPA548T is preferable to a low-power op amp when the load demands substantial current, a large voltage swing, or user-configurable current limiting. Conversely, a conventional precision amplifier remains preferable for low-current instrumentation where its lower dissipation, lower cost, and simpler thermal design are more important. No verified cross-brand part was established as a same-package, pin-to-pin replacement. TO-3 parts, DDPAK versions, and generic functional equivalents therefore require PCB changes or detailed engineering review and must not be treated as automatic drop-ins.
Comparaison avec les alternatives
| Paramètre | Ce produit | OPA548T-1 | OPA548T-2 | OPA548T-3 | OPA548T-4 | OPA548T-5 |
|---|---|---|---|---|---|---|
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Package | 7-lead TO-220 | 7-lead TO-220 | 7-lead TO-220 | 7-lead TO-220 | 7-lead TO-220 | 7-lead TO-220 |
| Gain-Bandwidth Product | 1 MHz | 1 MHz | 1 MHz | 1 MHz | 1 MHz | 1 MHz |
| Slew Rate | 10 V/µs | 10 V/µs | 10 V/µs | 10 V/µs | 10 V/µs | 10 V/µs |
| Supply Voltage Range | ±4 V to ±30 V | ±4 V to ±30 V | ±4 V to ±30 V | ±4 V to ±30 V | ±4 V to ±30 V | ±4 V to ±30 V |
| Thermal Shutdown Monitoring | Yes, via E/S pin | Yes, via E/S pin | Yes, via E/S pin | Yes, via E/S pin | Yes, via E/S pin | Yes, via E/S pin |
| Current-Limit Capability | User-selectable | User-selectable | User-selectable | User-selectable | User-selectable | User-selectable |
Principaux différenciateurs
- High-current drive in a standard TO-220 power package (vs OPA548T-1)
- Wide bipolar supply operating range (vs OPA548T-2)
- User-selectable output-current limiting (vs OPA548T-3)
- Thermal-shutdown status is externally observable (vs OPA548T-4)
Notes de conception
Treat the OPA548T tab as the primary heat-transfer path. Estimate worst-case dissipation from the actual supply rails and load current, then use the manufacturer's thermal data to select the required heatsink and copper area. Include enclosure temperature, adjacent heat sources, and worst-case continuous load. The E/S pin can be routed to a controller so thermal shutdown is detected, but monitoring does not remove the need for a sound thermal design.
Decouple each supply rail close to the device using the capacitance and ESR requirements specified in the manufacturer datasheet. Keep the output-current return path compact and preserve a low-impedance ground reference for both input and power currents. Check the load separately for inductive energy; motor, relay, and solenoid loads require an appropriate flyback clamp so reverse voltage does not exceed the amplifier's ratings.
Do not equate the ±4 V to ±30 V supply rating with a guaranteed output swing of the same magnitude. Output headroom depends on supply polarity, load current, output-stage saturation, and thermal state. Likewise, the 10 V/µs slew-rate figure does not guarantee that every load can be driven at that rate. Check output-current limits, capacitive-load stability, safe operating area, and the configured current limit before operating near the device's boundaries.
Use short feedback traces to prevent parasitic capacitance and board inductance from destabilizing the high-current loop. Place input, feedback, and decoupling connections away from the output and thermal-tab current path. If the package tab is connected to a negative supply rather than ground, follow the exact manufacturer land-pattern instructions and preserve isolation from sensitive input nodes. Verify the selected PCB footprint against the straight-lead or staggered-lead TO-220 mechanical drawing.
Informations de conformité
The supplied verified snippets do not provide explicit RoHS, REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals statements for OPA548T. Compliance must be confirmed on the exact Texas Instruments ordering entry. AEC-Q100 is marked not_applicable because no automotive qualification claim was supplied.
