OPA547F/500 - 500mA High-Voltage Op Amp w/ Shutdown | Texas Instruments
N.º da peça: OPA547F/500 ✓ Ativo| Qtd. | Preço unitário | Total |
|---|---|---|
| 1 | $9.45 | $9,45 |
| 10 | $8.51 | $85,10 |
| 100 | $7.42 | $742,00 |
| 500 | $6.55 | $3.275,00 |
| 1.000 | $5.85 | $5.850,00 |
OPA547F/500 Visão geral
What is a high-current power operational amplifier? A high-current power op amp is a specialized linear integrated circuit that combines the precision, feedback control, and closed-loop stability of a general-purpose op amp with the output drive capability required to source or sink hundreds of milliamps directly into a load. Unlike a small-signal op amp, the power op amp includes on-chip thermal protection, wide supply-voltage tolerance, and often an output-disable or shutdown pin. In the system hierarchy it sits between a low-level control circuit (such as a microcontroller DAC, a sensor conditioner, or an analog signal path) and a high-power load (motors, solenoids, heaters, audio transducers). The OPA547 belongs to this power-op-amp category and is widely used as a programmable current source, H-bridge driver, audio line driver, or high-voltage transducer amplifier.
Key features of the OPA547F/500 include a wide output voltage swing that approaches each supply rail, fully-protected operation with user-adjustable current limit via a single external resistor, dedicated Enable/Shutdown (E/S) pin with a status flag, and thermal shutdown indication. The integrated protections dramatically reduce external component count and simplify PCB layout in motor, solenoid, and valve driver designs.
Architecturally, the OPA547 uses a complementary bipolar output stage capable of swinging within ~1 V of each rail at full load, paired with a precision input stage that provides 100 nA input bias current and 1 mV typical input offset voltage. The combination delivers dc accuracy suitable for closed-loop transducer biasing while still providing the high transient current demanded by reactive loads.
Typical applications include high-voltage motor and solenoid drivers, programmable voltage and current sources, valve and actuator control in industrial automation, audio amplifiers and line drivers, and test-and-measurement power boosters. The wide supply range also makes it suitable for 24 V industrial bus systems and 48 V telecom/battery systems.
When designing with the OPA547F/500, ensure the PCB copper pour under the exposed tab is sized to keep junction temperature within the 150 °C maximum, and choose the ILIM resistor carefully to set the current-limit threshold just above the maximum required load current to avoid false triggering yet still protect against short circuits.
This page synthesizes the manufacturer datasheet, current distributor pricing, pin-compatible alternatives, and practical design notes to support fast, reliable selection for power analog designs.
Alternativas drop-in para OPA547F/500 — mesmo encapsulamento, compatível pino a pino. Peças de encapsulamento diferente que exigem retrabalho na PCB são excluídas.
Variantes desta série
Modelos da mesma série compatíveis como drop-in com OPA547F/500 (mesmo formato e footprint) — diferindo em Amplifier Type, Operating Temperature, Package, Slew Rate.
Ferramenta de comparação rápida — selecione peças alternativas para comparação lado a lado:
OPA547F
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
OPA547FKTWTG3
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
OPA548FKTWT
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
OPA547T
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
OPA547F/500 Classificações máximas e características elétricas
| Number of Channels | 1 |
| Amplifier Type | General Purpose / Power |
| Output Current (Continuous) | 500 mA |
| Peak Output Current | 750 mA (with proper heatsinking) |
| Supply Voltage (Single) | 8 V to 60 V |
| Supply Voltage (Dual) | ±4 V to ±30 V |
| Gain-Bandwidth Product (GBW) | 1 MHz |
| Slew Rate | 6 V/µs |
| Input Bias Current | 100 nA (max) |
| Input Offset Voltage | 1 mV (typical) |
| Quiescent Supply Current | 10 mA |
| Output Voltage Swing | Approaches each rail (wide swing) |
| Shutdown Feature | Yes (Enable/Shutdown pin with status flag) |
| Limitação de corrente | User-adjustable via external resistor |
| Desligamento térmico | Yes (with status indication on E/S pin) |
| Encapsulamento | TO-263 (DDPAK-7, KTW) — 7 leads + tab |
| Tipo de montagem | Surface Mount |
| Temperatura de operação | -40 °C to +85 °C |
| Status RoHS | Compliant |
Configuração de pinos do OPA547F/500
| Pino 1 | E/S — Enable/Shutdown input with status flag output |
| Pino 2 | -Vs — Negative supply voltage |
| Pino 3 | IN- — Inverting input |
| Pino 4 | IN+ — Non-inverting input |
| Pino 5 | +Vs — Positive supply voltage |
| Pino 6 | OUT — Power output |
| Pino 7 | ILIM — Current limit set (external resistor to ground) |
| Pino Tab | Tab — Exposed thermal pad — must be soldered to copper pour for heatsinking |
Aplicações típicas
OPA547F/500 é adequado para 6 aplicaçãos: DC Motor and Voice-Coil Driver, Programmable Voltage and Current Source, Industrial Solenoid and Valve Driver, Audio Line Driver and Headphone Amplifier, Piezoelectric Actuator Driver, 48 V Telecom and Battery System Buffer.
DC Motor and Voice-Coil Driver
The OPA547F/500 is well suited as a single-quadrant DC motor driver or voice-coil actuator amplifier, where its 500 mA continuous output current and 60 V supply tolerance allow direct drive of small brushed motors, focus mechanisms, and valve actuators. The 1 MHz gain-bandwidth and 6 V/µs slew rate provide sufficient closed-loop bandwidth for current-mode control loops used in precision positioning. Integrated thermal shutdown and adjustable current limit protect the winding from stall currents, while the wide output swing approaching each rail maximizes usable motor voltage from a given supply.
Recomendado
Programmable Voltage and Current Source
In test-and-measurement and laboratory equipment, the OPA547F/500 serves as a high-compliance programmable voltage source or Howland current pump. The 1 mV typical input offset and 100 nA bias current support accurate low-current setpoints, while the user-adjustable current limit (set by a single external resistor on the ILIM pin) provides intrinsic short-circuit protection for the device under test. The shutdown pin with status flag enables fast multiplexing between test channels without removing power from the entire instrument.
Recomendado
Industrial Solenoid and Valve Driver
Factory automation systems use the OPA547F/500 to switch and modulate 24 V industrial solenoids, pneumatic valves, and hydraulic actuators. The wide 8 V to 60 V single-supply range directly interfaces with 24 V factory buses, while the 500 mA continuous output easily drives typical 24 V / 1 A inrush solenoid coils when paralleled or used with an external booster. The Enable/Shutdown pin allows logic-level control from a PLC or microcontroller, and the integrated current limit prevents coil failure from overcurrent events.
Recomendado
Audio Line Driver and Headphone Amplifier
The OPA547F/500 delivers high-fidelity audio line-driver performance with 1 MHz bandwidth and 6 V/µs slew rate, supporting wide-bandwidth audio signals into low-impedance headphones or balanced line inputs. The wide output swing (approaching each rail) provides high headroom from standard ±15 V or ±18 V audio rails. Thermal shutdown and adjustable current limit protect headphones from accidental shorts. Although not a Class-D amplifier, the part is excellent for prototype audiophile amplifiers and professional balanced line drivers.
Recomendado
Piezoelectric Actuator Driver
Piezoelectric stacks and benders used in precision optics, inkjet printheads, and micro-positioning stages require high-voltage, high-current drive. The OPA547F/500's 60 V supply rating provides the compliance required to drive moderate piezo stacks, while its 500 mA continuous output enables fast charging of capacitive loads (piezo stacks typically look like 1 to 10 µF capacitors). The shutdown pin enables fast slewing between positions without dissipating quiescent current in the actuator.
Recomendado
48 V Telecom and Battery System Buffer
In telecom rectifiers, 48 V battery backup systems, and photovoltaic charge controllers, the OPA547F/500 acts as a high-current buffer between a low-power control circuit and the 48 V rail loads. Its 60 V absolute maximum rating tolerates transient spikes common on telecom buses, and the integrated current-limit and thermal protections ensure fail-safe behavior under fault conditions. The exposed-tab TO-263 package provides low thermal resistance when properly mounted, supporting sustained 500 mA output at elevated ambient temperatures.
Recomendado
Resumo dos produtos recomendados
Dados de referência de engenharia para OPA547F/500 — comparação, orientação de projeto e informações de conformidade.
Guia de seleção
Comparação com alternativas
| Parâmetro | Este produto | OPA547F | OPA547FKTWTG3 | OPA548FKTWT | OPA547T |
|---|---|---|---|---|---|
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Package | TO-263 (DDPAK-7, KTW) | TO-263 (DDPAK-7) - same | TO-263 (DDPAK-7) - same | TO-263 (DDPAK-7) - same | TO-220-7 - through-hole |
| Continuous Output Current | 500 mA | 500 mA | 500 mA | 3 A | 500 mA |
| Supply Voltage Range (Single) | 8 V to 60 V | 8 V to 60 V | 8 V to 60 V | 8 V to 60 V | 8 V to 60 V |
| Gain-Bandwidth Product | 1 MHz | 1 MHz | 1 MHz | 1 MHz | 1 MHz |
| Slew Rate | 6 V/µs | 6 V/µs | 6 V/µs | 10 V/µs | 6 V/µs |
| Shutdown Pin | Yes (E/S with status flag) | Yes | Yes | Yes (E/S with status flag) | Yes |
| Adjustable Current Limit | Yes | Yes | Yes | Yes | Yes |
| Mounting Type | Surface Mount | Surface Mount | Surface Mount | Surface Mount | Through-Hole (TO-220) |
Principais diferenciais
- Integrated shutdown pin with thermal status flag (vs OPA544T)
- Higher continuous output current in same TO-263 footprint (vs OPA547T)
- Upgrade path to higher current without PCB redesign (vs OPA548FKTWT)
- Wide 60 V supply tolerance covers 24 V industrial and 48 V telecom (vs OPA547FKTWTG3)
Notas de projeto
The TO-263 (KTW) package's primary thermal path is the exposed metal tab on the underside of the part. Estimated: at 500 mA load with VIN = 24 V and VOUT = 12 V, internal dissipation is approximately (24 − 12) × 0.5 = 6 W. Without a copper pour, junction temperature can exceed 150 °C in seconds. Solder the tab to a copper pour of at least 1 square inch (645 mm²) on top and bottom layers connected by thermal vias to keep θJA below 30 °C/W and avoid thermal shutdown.
The Enable/Shutdown (E/S) pin is dual-function: it accepts a logic-level enable input AND drives a status flag indicating thermal shutdown. Do not leave the E/S pin floating — if shutdown control is not required, tie it high through a 10 kΩ resistor to +Vs to ensure normal operation. Also, place the ILIM resistor as close as possible to the ILIM pin to avoid oscillation in the current-limit loop, and use 1% tolerance or better to set the threshold accurately.
For the OPA547F/500 in TO-263, lay out the PCB with wide copper traces on +Vs and OUT (at least 0.1 inch / 2.5 mm width for 500 mA) to minimize voltage drop and thermal hot spots. Use a star-ground topology with the load return and power ground meeting at a single point near the output capacitor. Place 0.1 µF ceramic bypass capacitors within 5 mm of each supply pin, plus a 10 µF tantalum or aluminum bulk capacitor on each rail to handle transient current demands of inductive loads.
When driving inductive loads such as motors, solenoids, or relays, the output swing approaching the rails combined with inductive kickback can easily exceed the absolute maximum supply rating. Add flyback diodes (Schottky preferred for fast switching) directly across the load to clamp back-EMF, and consider a TVS diode across the supply pins to protect against supply transients common in 24 V industrial environments.
Informações de conformidade
RoHS and lead-free compliance confirmed via TI product page and distributor listings. Not AEC-Q100 qualified — for automotive applications, contact TI for automotive-grade alternatives. Halogen-free status not explicitly stated in available data.
