Overview
The DRV591VFPRG4 from Texas Instruments is a high-efficiency, high-current power amplifier designed to drive a wide variety of thermoelectric cooler (TEC) elements and laser diodes. This device operates within a supply voltage range of 2.8 V to 5.5 V, making it versatile for various system requirements. The DRV591 features PWM operation and a low output stage on-resistance, significantly reducing power dissipation and heat generation. It is internally protected against thermal and current overloads, ensuring reliable operation and preventing damage to the device.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Supply Voltage (AVDD, PVDD) | -0.3 | 5.5 | V | |
| Input Voltage (VI) | -0.3 | VDD + 0.3 | V | |
| Output Current (IO) | 3 | A | ||
| Operating Free-Air Temperature (TA) | -40 | 85 | °C | |
| Output Offset Voltage (VOO) | 14 | 100 | mV | |
| High-Level Input Current (IIH) | 1 | µA | ||
| Low-Level Input Current (IIL) | 1 | µA | ||
| Common Mode Voltage Range (VICM) at VDD = 5 V | 1.2 | 3.8 | V | |
| Drain-Source On-State Resistance (rDS(on)) at VDD = 5 V, IO = 4 A | 25 | 65 | 95 | mΩ |
Key Features
- Maximum output current of 3 A
- Low supply voltage operation: 2.8 V to 5.5 V
- High efficiency generates less heat
- Over-current and thermal protection
- Fault indicators for over-current, thermal, and under-voltage conditions
- Two selectable switching frequencies: 500 kHz and 100 kHz
- Internal or external clock sync capability
- PWM scheme optimized for EMI reduction
- Fixed internal gain of approximately 2.34 V/V
- Shutdown mode with TTL logic control
- 9×9 mm PowerPAD Quad Flatpack package
Applications
- Thermoelectric Cooler (TEC) driver
- Laser diode biasing
Q & A
- What is the maximum output current of the DRV591?
The maximum output current of the DRV591 is 3 A.
- What is the operating supply voltage range of the DRV591?
The DRV591 operates within a supply voltage range of 2.8 V to 5.5 V.
- What types of protection does the DRV591 offer?
The DRV591 offers over-current, thermal, and under-voltage protection.
- How does the DRV591 indicate faults?
The DRV591 indicates faults through two status flag output pins (FAULT0 and FAULT1), which signal over-current, under-voltage, and overtemperature conditions.
- What are the selectable switching frequencies of the DRV591?
The DRV591 allows selection between two switching frequencies: 500 kHz and 100 kHz.
- Can the DRV591 be synchronized with an external clock signal?
- What is the fixed internal gain of the DRV591?
The fixed internal gain of the DRV591 is approximately 2.34 V/V.
- How does the shutdown mode work on the DRV591?
The shutdown mode disables the outputs and places the device in a low supply current state, controlled by a TTL logic signal on the SHUTDOWN pin.
- What package type is the DRV591 available in?
The DRV591 is available in a 9×9 mm PowerPAD Quad Flatpack package.
- What are the primary applications of the DRV591?
The primary applications of the DRV591 include driving thermoelectric cooler elements and laser diode biasing.
