OPA547T - 60V High-Current Op Amp | Texas Instruments
MPN： OPA547T ✓ 啟用中OPA547T 概覽
A high-current operational amplifier is a voltage-feedback amplifier that combines differential input amplification with low-impedance output drive. The OPA547 belongs to the operational-amplifier hierarchy within analog and linear power-management ICs, extending ordinary op-amp signal-conditioning roles into motor, transducer, solenoid, and high-current feedback applications. Its seven-lead power package provides a practical thermal path for dissipating power in the output stage.
Key features include operation from a single supply up to +60 V or from dual supplies up to ±30 V, continuous output current of 500 mA, a wide output-voltage swing, and a wide bandwidth of 1 MHz according to the manufacturer product information. Output-disable control allows the amplifier to be placed into a shutdown state, while adjustable current limit and thermal shutdown provide protection when the driven load demands excessive current or the device exceeds its safe thermal operating condition.
The OPA547T uses a single operational-amplifier channel with shutdown capability. Its architecture is intended to drive relatively low-impedance loads without relying on an external output-buffer stage. The E/S pin can also be monitored to determine whether the amplifier has entered thermal shutdown, providing a usable system-level status indication. The broad supply range allows operation from elevated industrial rails without requiring a separate high-voltage driver stage.
Typical uses include driving power MOSFET or bipolar-transistor output stages, controlling high-current solenoids, driving audio or instrumentation loads, and implementing voltage-feedback control loops in power-conversion equipment. The 500 mA continuous output capability is especially useful when a load would exceed the output-current limits of a conventional small-package op amp. Applications must still account for the voltage and current dissipated by the output stage.
The primary design consideration is thermal management. Copper area, heat sinking, and the actual load duty cycle determine whether the TO-220 package can dissipate the calculated output-stage power safely. The output-disable and current-limit functions should be defined during startup, fault handling, and system shutdown so that the amplifier is not inadvertently operated in a state that exceeds its thermal or current capability.
This page consolidates the verified manufacturer and distributor information for the OPA547T with package, procurement, application, and design guidance. It also distinguishes genuine same-package alternatives from merely similar amplifiers, helping engineers assess replacement risk without assuming that a common high-voltage or high-current feature guarantees pin-to-pin compatibility.
直接替換替代品，適用於 OPA547T — 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： OPA547T （相同外形與佔位） — 差異在於 Package, Mounting Type, Slew Rate, Thermal Shutdown, Amplifier Type.
OPA547T-1
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
OPA548T
✅ 直接替換聯絡詢價
查看資料表 →OPA544T
✅ 直接替換聯絡詢價
查看資料表 →OPA543T
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
OPA547T 最大額定值與電氣特性
| Product Type | High-voltage, high-current operational amplifier |
| Number of Circuits | 1 circuit |
| Maximum Single-Supply Voltage | 60 V |
| Maximum Dual-Supply Voltage | ±30 V |
| Continuous Output Current | 500 mA |
| Gain-Bandwidth Product | 1 MHz |
| Shutdown Capability | Yes |
| Output-Disable Control | Yes |
| Current-Limit Protection | Adjustable current limit |
| 過熱關機 | Yes |
| 工作溫度範圍 | -40 °C to +85 °C |
| 封裝 | TO-220 (KVT), 7 pins |
| Package Mounting Type | Through-hole |
| Lead Configuration | 7-lead staggered or straight lead |
| Output-Voltage Swing | Wide output voltage swing; exact limits not stated in the provided data |
| Thermal-Shutdown Status Monitoring | E/S pin can be monitored |
OPA547T through-hole 腳位配置指南
OPA547T（through-hole 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： OPA547T.
請參閱 資料表 以查看完整腳位配置。
典型應用
OPA547T 適用於 6 應用s: Power MOSFET Gate Drivers, High-Current Solenoid Drivers, Audio Power Buffer, Industrial Transducer Signal Drivers, Power Conversion Feedback Amplifiers, Programmable Power Supply Outputs.
Power MOSFET Gate Drivers
The OPA547T can serve as the high-voltage buffer between a control signal and a power MOSFET or bipolar-transistor output stage. Its 500 mA continuous output-current capability provides substantially more drive than a conventional small-package operational amplifier, while the +60 V single-supply or ±30 V dual-supply rating supports elevated bus voltages. In a typical application, the amplifier works inside a feedback loop and directly drives the output transistor. The benefit is reduced drive-stage complexity, although the designer must account for the OPA547T output-stage dissipation, the load’s switching losses, and the thermal rise of the 7-pin TO-220 package.
推薦
High-Current Solenoid Drivers
The OPA547T is appropriate for current-controlled or voltage-feedback solenoid-driver circuits where the load current is substantial and the supply rail is above the range of ordinary op amps. Its verified 500 mA continuous output rating gives the circuit useful current headroom, while adjustable current limiting can help constrain abnormal load current. The amplifier should be configured so that current through the solenoid does not exceed both the device rating and the thermal capability of the selected package. Duty-cycle-aware loss calculations are necessary because a resistive winding stores and returns energy even when the steady-state current appears acceptable.
推薦
Audio Power Buffer
The OPA547T can provide a high-current output stage for audio or instrumentation systems requiring more load drive than a standard precision operational amplifier. Its 500 mA continuous output-current capability is useful for low-impedance speaker or line-driver networks, while the 1 MHz gain-bandwidth product supports audio-band closed-loop designs. Compared with a small signal op amp followed by a discrete transistor buffer, the integrated amplifier can simplify the signal path and active feedback arrangement. Designers should still evaluate output distortion, voltage swing, quiescent dissipation, and stable gain settings at the intended load impedance.
推薦
Industrial Transducer Signal Drivers
The OPA547T fits excitation and return-path circuits for industrial transducers that require a low-impedance, high-voltage output. Its ±30 V dual-supply operation permits bipolar drive around ground, and its 500 mA output-current capability can support loads that would burden a conventional precision amplifier. The amplifier may be used in a closed-loop voltage-control arrangement to reduce loading effects and improve excitation accuracy. The key trade-off is electrical and thermal robustness: output current, supply voltage, and load impedance determine dissipation, so the TO-220 package requires adequate copper or heat sinking in sustained high-load operation.
推薦
Power Conversion Feedback Amplifiers
The OPA547T can serve as a voltage-feedback amplifier in power-conversion and industrial control systems where the feedback network must sense or drive a high-current power stage. The verified +60 V single-supply rating accommodates elevated control rails, and the 500 mA continuous output capability can reduce the need for an additional discrete driver. In a feedback implementation, the amplifier’s saturation behavior, output swing, phase margin, and thermal state become important to loop stability and recovery. The shutdown and thermal-shutdown functions also support safe fault sequencing, although the E/S status behavior must be incorporated into system control.
推薦
Programmable Power Supply Outputs
The OPA547T can be used as the output amplifier in a programmable laboratory or industrial supply that requires bipolar or high-voltage load drive. Its ±30 V dual-supply capability supports centered outputs, while 500 mA continuous current is useful for moderate test loads. A closed-loop design can improve output impedance and regulation by sensing the load voltage directly. The principal design limitation is output-stage power dissipation: the voltage drop across the amplifier multiplied by load current becomes heat, so maximum output amplitude and load current cannot be treated as independent continuous ratings. Shutdown control can also improve sequencing between multiple rails.
推薦
工程參考資料，適用於 OPA547T — 比較、設計指引及合規資訊。
選型指南
與替代品比較
| 參數 | 本產品 | OPA547T-1 | OPA548T | OPA544T | OPA543T |
|---|---|---|---|---|---|
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Package | TO-220 (KVT), 7 pins | TO-220 (KVT), 7 pins | TO-220 (KVT), 7 pins | TO-220 (KVT), 7 pins | TO-220 (KVT), 7 pins |
主要差異化特點
- Verified high continuous output-current capability (對比OPA549T)
- High-voltage operation with integrated shutdown control (對比OPA544T)
- Same-family ordering option for exact footprint reuse (對比OPA548T)
設計說明
Estimate the amplifier output-stage dissipation from the voltage drop across the output stage multiplied by the average load current, then add quiescent and feedback-network losses. Estimated: at 20 V across the output device and 100 mA average load current, output dissipation is approximately 2 W. The actual 7-pin TO-220 package must be evaluated with its specified thermal resistance, board copper, ambient temperature, and available heat sinking; the 500 mA current rating alone does not establish safe continuous operation at every output voltage.
Design the protection network around the verified adjustable current-limit and shutdown functions instead of relying on the nominal 500 mA rating as a fault limit. Confirm the official data sheet for the current-limit adjustment method, E/S logic, and shutdown behavior. Define the inactive state during startup so the output remains disabled until supplies and feedback are stable. If the load can have substantial stored energy, include an appropriate external energy-dissipation or flyback path and verify that its voltage and current do not exceed component ratings.
Use a low-impedance ground return for the output and feedback networks, and keep the high-current output path physically separate from sensitive input and feedback traces to reduce shared-impedance disturbances. Place compensation, current-setting, and feedback components close to the relevant device pins. The exact pin functions and exposed-tab or lead connections must be taken from the official OPA547 data sheet because the complete seven-pin map was not included in the supplied dataset.
Do not assume that a generic 7-pin TO-220 power-amplifier package is pin-compatible. The OPA547 family uses a specific lead arrangement and provides an E/S shutdown-status function that may not appear on alternatives. Before fitting OPA544T, OPA548T, OPA543T, or OPA547T-1, compare the manufacturer pin tables, supply limits, current-limit implementation, thermal limits, and package dimensions. Also avoid operating near the 60 V single-supply maximum without accounting for transient margin.
合規資訊
The supplied verified results do not state the OPA547T's RoHS, REACH, lead-free, halogen-free, or conflict-minerals status. The industrial temperature rating does not itself constitute AEC-Q100 qualification.
