Overview
The OPA544T is a high-voltage, high-current operational amplifier produced by Texas Instruments. It is designed to drive a wide variety of high power loads, combining high performance FET op amp circuitry and a high power output stage on a single monolithic chip. The amplifier is protected by internal current limit and thermal shutdown circuits, ensuring robust operation under various conditions. It is available in industry-standard 5-lead TO-220 and 5-lead surface-mount power packages, with a copper tab that allows easy mounting to a heat sink for excellent thermal performance. The OPA544T is specified for operation over the extended industrial temperature range of -40°C to +85°C.
Key Specifications
| Specification | Value |
|---|---|
| Package | TO-220 (KC), 5-lead surface-mount |
| Pins | 5 |
| Operating Temperature Range (°C) | -40 to 85 |
| Output Current (min) | 2A |
| Power Supply Range (±V) | ±10 to ±35V |
| Slew Rate | 8V/µs |
| Input Bias Current | 100pA max |
| Gain Bandwidth Product | 1.4MHz |
| Input Offset Voltage | 1mV |
| Supply Current | 12mA |
| Lead Free Status / RoHS Status | Lead Free / RoHS Compliant |
Key Features
- High Output Current: Minimum of 2A, making it suitable for high power loads.
- Wide Power Supply Range: Operates with power supply voltages from ±10V to ±35V.
- High Slew Rate: 8V/µs, enabling fast response times.
- Internal Current Limit: Protects the device from excessive current draw.
- Thermal Shutdown Protection: Activates at a junction temperature of approximately 155°C to prevent overheating.
- FET Input: Low input bias current of 100pA max.
- Thermal Performance: Copper tab for easy mounting to a heat sink.
Applications
The OPA544T is versatile and can be used in various high power applications, including:
- Industrial Control Systems: Driving high power loads such as motors, valves, and other industrial actuators.
- Audio Power Amplifiers: High power audio systems requiring high current and voltage swing.
- Medical Equipment: Powering medical devices that require high reliability and precision.
- Aerospace and Defense: Applications requiring high power and robust operational amplifiers.
- Automotive Systems: Driving high power loads in automotive environments.
Q & A
- What is the maximum output current of the OPA544T?
The OPA544T has a minimum output current of 2A.
- What is the operating temperature range of the OPA544T?
The OPA544T operates over the extended industrial temperature range of -40°C to +85°C.
- What is the slew rate of the OPA544T?
The slew rate of the OPA544T is 8V/µs.
- Does the OPA544T have internal current limit and thermal shutdown protection?
Yes, the OPA544T is protected by internal current limit and thermal shutdown circuits.
- What types of packages are available for the OPA544T?
The OPA544T is available in 5-lead TO-220 and 5-lead surface-mount power packages.
- What is the gain bandwidth product of the OPA544T?
The gain bandwidth product of the OPA544T is 1.4MHz.
- Is the OPA544T RoHS compliant?
Yes, the OPA544T is lead-free and RoHS compliant.
- How should the surface-mount package version be soldered?
The mounting tab of the surface-mount package version should be soldered to a circuit board copper area for good heat dissipation.
- What happens during a short-circuit to ground?
A short-circuit to ground can activate the thermal shutdown circuit due to excessive power dissipation.
- Can the OPA544T be used in unbalanced power supply configurations?
Yes, the OPA544T can be used in applications where the power supply voltages are not equal.
