Overview
The DRV103H is a low-side DMOS power switch produced by Texas Instruments, designed to employ a pulse-width modulated (PWM) output. This device is optimized for driving electromechanical devices such as valves, solenoids, relays, actuators, motors, and positioners. It is also suitable for driving thermal devices like heaters, coolers, and lamps. The PWM operation helps in conserving power and reducing heat rise, thereby enhancing reliability. The DRV103H features adjustable PWM, allowing fine control over the power delivered to the load, and its DC-to-PWM output delay time and oscillator frequency are externally adjustable.
Key Specifications
| Parameter | Value | Units |
|---|---|---|
| Output Current | 1.5 A (SO-8), 3 A (PowerPAD SO-8) | A |
| Output Saturation Voltage | +0.4 to +0.6 V (IO = 1 A), +0.05 to +0.07 V (IO = 0.1 A) | V |
| Current Limit | 3 to 4.2 A | A |
| Leakage Current | ±1 to ±10 µA | µA |
| Oscillator Frequency | 500 Hz to 100 kHz | Hz |
| Operating Temperature Range | -40 to +85 °C | °C |
| Supply Voltage Range | +8 to +32 V | V |
| Quiescent Current | 0.4 to 0.8 mA | mA |
| Thermal Shutdown Junction Temperature | +160 °C | °C |
| Thermal Resistance (θJA) | 150 °C/W (SO-8), 68 °C/W (PowerPAD SO-8) | °C/W |
Key Features
- HIGH OUTPUT DRIVE: Available in 1.5A and 3A versions.
- WIDE SUPPLY RANGE: Operates from +8V to +32V.
- COMPLETE FUNCTION: Digitally controlled input, PWM output, and adjustable internal oscillator.
- ADJUSTABLE DELAY AND DUTY CYCLE: Externally adjustable delay and duty cycle.
- FULLY PROTECTED: Thermal and current limit shutdown with status OK indicator flag.
- PACKAGES: Available in SO-8 and PowerPAD SO-8 packages.
Applications
- ELECTROMECHANICAL DRIVER: Solenoids, valves, positioners, actuators, relays, power contactor coils, heaters, lamps.
- HYDRAULIC AND PNEUMATICS SYSTEMS: Part handlers and sorters, chemical processing.
- ENVIRONMENTAL MONITORING AND HVAC: Thermo-electric coolers, DC motor speed controls.
- MEDICAL AND SCIENTIFIC ANALYZERS: Fuel injector drivers.
Q & A
- What is the primary function of the DRV103H?
The DRV103H is a low-side DMOS power switch that employs a pulse-width modulated (PWM) output, optimized for driving electromechanical and thermal devices.
- What are the available output current versions of the DRV103H?
The DRV103H is available in two output current versions: 1.5A (SO-8 package) and 3A (PowerPAD SO-8 package).
- What is the operating temperature range of the DRV103H?
The DRV103H operates within a temperature range of -40°C to +85°C.
- How can the PWM output frequency be adjusted?
The PWM output frequency can be adjusted by connecting a resistor between the Osc Freq Adjust pin and ground, allowing a frequency range of 500 Hz to 100 kHz.
- What protection features does the DRV103H have?
The DRV103H features thermal and current limit shutdown with a status OK indicator flag.
- How is the duty cycle of the PWM output controlled?
The duty cycle can be controlled using a resistor, an analog voltage, or a Digital-to-Analog (D/A) converter.
- What types of devices can the DRV103H drive?
The DRV103H can drive electromechanical devices such as solenoids, valves, relays, actuators, and motors, as well as thermal devices like heaters, coolers, and lamps.
- What is the significance of the PowerPAD package?
The PowerPAD SO-8 package includes an exposed metal heat sink, which helps in reducing the thermal resistance and increasing the continuous current handling capability.
- How does the delay to PWM mode work?
The delay to PWM mode can be adjusted using an external capacitor connected to the Delay Adjust pin, allowing for a variable delay time.
- What indicates a fault condition in the DRV103H?
A fault condition, such as thermal shutdown or over-current, is indicated by the OK flag going low.
