OPA548T - High-Voltage Power Op Amp | Texas Instruments
MPN： OPA548T ✓ 啟用中OPA548T 概覽
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.
直接替換替代品，適用於 OPA548T — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
此系列的變體
與下列產品可直接替換的同系列型號： OPA548T （相同外形與佔位） — 差異在於 Package, Gain-Bandwidth Product, Mounting Type, Operating Temperature Range, Slew Rate.
OPA548T-1
✅ 直接替換📋 參考替代品（不在目錄中）
OPA548T-2
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
OPA548T-3
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
OPA548T-4
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
OPA548T-5
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
OPA548T 最大額定值與電氣特性
| 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 |
| 封裝 | 7-lead TO-220 |
| 腳位數 | 7 pins |
| 安裝類型 | Through-hole power package |
| Slew Rate | 10 V/µs |
| 過熱關機 | Internally protected |
| Current Overload Protection | Internally protected |
| E/S Status Pin | Output can be monitored for thermal-shutdown status |
| 電流限制 | User-selectable |
OPA548T 7-lead to-220 腳位配置指南
OPA548T（7-lead to-220 封裝）的腳位配置。 此類比元件具有輸入、輸出與電源腳位。偏移歸零、補償與致能腳位配置請參閱製造商資料表。適用於訊號調理與放大器電路。
無詳細腳位定義資料： OPA548T.
請參閱 資料表 以查看完整腳位配置。
典型應用
OPA548T 適用於 6 應用s: 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.
推薦
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.
推薦
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.
推薦
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.
推薦
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.
推薦
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.
推薦
推薦產品摘要
工程參考資料，適用於 OPA548T — 比較、設計指引及合規資訊。
選型指南
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.
與替代品比較
| 參數 | 本產品 | 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 |
主要差異化特點
- High-current drive in a standard TO-220 power package (對比OPA548T-1)
- Wide bipolar supply operating range (對比OPA548T-2)
- User-selectable output-current limiting (對比OPA548T-3)
- Thermal-shutdown status is externally observable (對比OPA548T-4)
設計說明
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.
合規資訊
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.
