Overview
The DRV103U/2K5, produced by Texas Instruments, is a low-side DMOS power switch designed to drive electromechanical and thermal devices. It employs a pulse-width modulated (PWM) output, which conserves power and reduces heat, enhancing reliability. The device is optimized for driving solenoids, valves, relays, actuators, motors, positioners, heaters, coolers, and lamps. It features adjustable PWM frequency and duty cycle, allowing for fine control over the power delivered to the load.
Key Specifications
| Parameter | Min | Max | Units | |
|---|---|---|---|---|
| Output Current (SO-8 Package) | - | 1.5 | - | A |
| Output Current (PowerPAD™ SO-8 Package) | - | 3 | - | A |
| Output Saturation Voltage (IO = 1A) | 0.4 | 0.6 | - | V |
| Current Limit | 3 | 3.5 | 4.2 | A |
| Leakage Current (DMOS Output Off, VO = +32V) | ±1 | - | ±10 | µA |
| Propagation Delay (On-to-Off and Off-to-On) | - | 1 | - | µs |
| Oscillator Frequency Range | 0.5 | - | 100 | kHz |
| Operating Voltage Range | +8 | - | +32 | V |
| Quiescent Current (IO = 0) | 0.4 | - | 0.8 | mA |
| Specified Temperature Range | -40 | - | +85 | °C |
| Thermal Shutdown Junction Temperature | - | - | +160 | °C |
Key Features
- PWM Output: The DRV103 employs a pulse-width modulated (PWM) output to conserve power and reduce heat, enhancing reliability.
- Adjustable PWM Frequency and Duty Cycle: The PWM frequency and duty cycle can be externally adjusted, allowing for fine control over the power delivered to the load.
- Strong Initial Closure and Soft Hold Mode: The device can be set to provide a strong initial closure, automatically switching to a “soft” hold mode for power savings.
- Thermal Shutdown and Over-Current Protection: Features thermal shutdown and over-current protection to prevent damage to the IC.
- OK Flag for Fault Indication: Provides a fault indication for over-current and thermal shutdown conditions through the OK Flag output.
- Low On-Resistance: The output DMOS transistor has a low on-resistance of 0.5Ω, ensuring low power dissipation.
- Compact Packages: Available in SO-8 and PowerPAD™ SO-8 packages with exposed metal heat sink for improved thermal performance.
Applications
- Electromechanical Devices: Suitable for driving solenoids, valves, relays, actuators, motors, and positioners.
- Thermal Devices: Ideal for driving heaters, coolers, and lamps.
- Environmental Monitoring and HVAC: Used in environmental monitoring and HVAC systems.
- DC Motor Speed Controls: Can be used in DC motor speed control applications.
- Medical and Scientific Analyzers: Applied in medical and scientific analyzers.
- Fuel Injector Drivers: Suitable for fuel injector driver applications.
Q & A
- What is the primary function of the DRV103?
The DRV103 is a low-side DMOS power switch that employs a pulse-width modulated (PWM) output to drive electromechanical and thermal devices.
- What are the available output current ratings for the DRV103?
The DRV103 is available in two packages: SO-8 with an output current of 1.5A and PowerPAD™ SO-8 with an output current of 3A.
- How can the PWM frequency and duty cycle be adjusted?
The PWM frequency and duty cycle can be adjusted using external resistors connected to the Osc Freq Adj and Duty Cycle Adjust pins, respectively.
- What is the purpose of the OK Flag output?
The OK Flag output provides a fault indication for over-current and thermal shutdown conditions.
- What are the thermal shutdown and reset temperatures for the DRV103?
The thermal shutdown temperature is approximately +160°C, and the device resets when the junction temperature cools to approximately +140°C.
- Can the PowerPAD™ be used as a ground connection?
No, the PowerPAD™ should not be used as a power ground connection to avoid erratic operation. It should be connected to the GND pin for proper grounding.
- What is the specified operating voltage range for the DRV103?
The specified operating voltage range is from +8V to +32V.
- What is the quiescent current of the DRV103?
The quiescent current is between 0.4mA and 0.8mA when the output is off.
- What are the typical propagation delays for the DRV103?
The propagation delays (On-to-Off and Off-to-On) are typically 1µs.
- What is the thermal resistance of the PowerPAD™ SO-8 package?
The thermal resistance (θJA) for the PowerPAD™ SO-8 package is approximately 68°C/W on a 1in² 0.5oz copper PCB.
