Overview
The UC2625Q, part of the UC2625 family, is a brushless DC motor controller produced by Texas Instruments. This device is designed to integrate most of the functions required for high-performance motor control. It supports both two-quadrant and four-quadrant operation, making it versatile for various motor control applications. The UC2625Q operates over a temperature range of –40°C to +105°C, making it suitable for a wide range of environments.
The controller includes features such as over-voltage and under-voltage protection, a direction latch for safe direction reversal, and a tachometer. It also has trimmed reference sources, programmable cross-conduction protection, and high-current push-pull drivers for low-side power devices and open-collector outputs for high-side power devices.
Key Specifications
| Parameter | Min | Max | Unit | |
|---|---|---|---|---|
| Supply Voltage (VCC) | 10 | - | 18 | V |
| Operating Temperature Range | -40 | - | 105 | °C |
| Supply Current | 14.5 | 30.0 | - | mA |
| VCC Turn-On Threshold | 8.65 | 8.95 | 9.45 | V |
| VCC Turn-Off Threshold | 7.75 | 8.05 | 8.55 | V |
| OV-COAST Inhibit Threshold | 1.65 | 1.75 | 1.85 | V |
| OV-COAST Restart Threshold | 1.55 | 1.65 | 1.75 | V |
| Error Amp Voltage Gain | 70 | 90 | - | dB |
| E/A OUT Range | 0.25 | - | 3.50 | V |
| Low-Side Drivers Voh (–1 mA) | 1.60 | 2.1 | - | V |
| High-Side Drivers Vol (1 mA) | 0.1 | 0.4 | - | V |
| Oscillator Frequency | 40 | 50 | 60 | kHz |
| Reference Output Voltage | 4.9 | 5.0 | 5.1 | V |
Key Features
- Over-Voltage and Under-Voltage Protection: Ensures the device operates within safe voltage limits.
- Direction Latch for Safe Direction Reversal: Prevents damage to power devices during direction changes.
- Tachometer: Provides feedback on motor speed.
- Trimmed Reference Sources: Offers stable voltage references for various functions.
- Programmable Cross-Conduction Protection: Prevents simultaneous turn-on of high-side and low-side power devices.
- High-Current Push-Pull Drivers: Drives low-side power devices directly.
- Open-Collector Outputs: Drives high-side power devices or level-shifting circuitry.
- Fixed-Frequency PWM Capability: Regulates motor current using pulse width modulation.
- Noise Blanking Filters: Prevents noise from affecting output transistors.
Applications
The UC2625Q is useful in a variety of high-power applications, including:
- Robotics: High-performance motor control for robotic systems.
- Machinery: Motor control in industrial machinery and equipment.
- Automotive Systems: Control of DC motors in automotive applications.
- Aerospace: High-reliability motor control in aerospace environments.
Q & A
- What is the operating temperature range of the UC2625Q?
The UC2625Q operates over a temperature range of –40°C to +105°C.
- What type of motor control does the UC2625Q support?
The UC2625Q supports both two-quadrant and four-quadrant motor control.
- What is the purpose of the direction latch in the UC2625Q?
The direction latch prevents damage to power devices during direction changes by ensuring that the direction signal is stable before it is applied to the motor.
- How does the UC2625Q protect against cross-conduction?
The UC2625Q includes programmable cross-conduction protection and noise blanking filters to prevent simultaneous turn-on of high-side and low-side power devices and to filter out noise.
- What is the typical supply current of the UC2625Q?
The typical supply current of the UC2625Q is 30 mA.
- What is the oscillator frequency range of the UC2625Q?
The oscillator frequency range of the UC2625Q is approximately 40 kHz to 60 kHz.
- How does the UC2625Q regulate motor current?
The UC2625Q regulates motor current using fixed-frequency pulse width modulation (PWM).
- What type of diodes are recommended for high-frequency chopping applications with the UC2625Q?
For high-frequency chopping, fast recovery circulating diodes such as Microsemi UHVP high voltage platinum rectifiers are recommended.
- Can the UC2625Q be used in low-voltage systems?
- What is the purpose of the tachometer output in the UC2625Q?
The tachometer output provides feedback on the motor speed, which can be used to control the motor's operation.
