Overview
The OPA549T is a high-voltage, high-current operational amplifier produced by Texas Instruments. This laser-trimmed monolithic integrated circuit is designed to drive a wide variety of loads with excellent low-level signal accuracy and high output voltage and current. It operates from either single or dual power supplies, offering flexibility in design. The OPA549T is internally protected against over-temperature conditions and current overloads, and it features an adjustable current limit that can be set from 0A to 10A using a resistor, potentiometer, or digitally with a DAC. The device is available in an 11-lead power package with a copper tab for easy heat sink mounting, ensuring excellent thermal performance over an extended industrial temperature range of –40°C to +85°C.
Key Specifications
| Parameter | Min | Typ | Max | Units |
|---|---|---|---|---|
| Output Current | 8A (Continuous), 10A (Peak) | A | ||
| Power Supply Range | +8V to +60V (Single), ±4V to ±30V (Dual) | V | ||
| Input Offset Voltage | ±1 | ±5 | mV | |
| Input Bias Current | –100 | –500 | nA | |
| Slew Rate | 9 | V/µs | ||
| Gain-Bandwidth Product | 0.9 | MHz | ||
| Operating Temperature | –40 | +85 | °C | |
| Junction Temperature | 150 | °C |
Key Features
- High Output Current: 8A Continuous, 10A Peak
- Wide Power-Supply Range: Single Supply: +8V to +60V, Dual Supply: ±4V to ±30V
- Wide Output Voltage Swing
- Fully Protected: Thermal Shutdown, Adjustable Current Limit
- Output Disable Control
- Thermal Shutdown Indicator
- High Slew Rate: 9V/µs
- Control Reference Pin
- 11-Lead Power Package
Applications
- Valve, Actuator Drivers
- Synchro, Servo Drivers
- Power Supplies
- Test Equipment
- Transducer Excitation
- Audio Power Amplifiers
Q & A
- What is the maximum continuous output current of the OPA549T? The maximum continuous output current is 8A, with a peak current of 10A.
- What is the power supply range for the OPA549T? The OPA549T operates from a single supply of +8V to +60V or a dual supply of ±4V to ±30V.
- How is the current limit adjusted on the OPA549T? The current limit can be adjusted from 0A to 10A using a resistor, potentiometer, or digitally with a DAC.
- What protection features does the OPA549T have? The OPA549T is internally protected against over-temperature conditions and current overloads, and it includes thermal shutdown and output disable control.
- What is the slew rate of the OPA549T? The slew rate is 9V/µs.
- What is the operating temperature range of the OPA549T? The operating temperature range is –40°C to +85°C.
- How is the thermal performance of the OPA549T enhanced? The thermal performance is enhanced by the copper tab that allows easy mounting to a heat sink.
- What is the purpose of the Enable/Status (E/S) pin? The E/S pin can be monitored to determine if the device is in thermal shutdown and can be forced low to disable the output stage.
- What types of loads can the OPA549T drive? The OPA549T can drive a wide variety of loads, including valves, actuators, synchros, servos, power supplies, test equipment, transducers, and audio power amplifiers.
- What package type is the OPA549T available in? The OPA549T is available in an 11-lead power package (TO-220).
