The DRV591 is a high-efficiency, high-current power amplifier ideal for driving a wide variety of thermoelectric cooler elements in systems powered from 2.8 V to 5.5 V. PWM operation and low output stage on-resistance significantly decrease power dissipation in the amplifier.
●The DRV591 is internally protected against thermal and current overloads. Logic-level fault indicators signal when the junction temperature has reached approximately 130°C to allow for system-level shutdown before the amplifiers internal thermal shutdown circuitry activates. The fault indicators also signal when an over-current event has occurred. If the over-current circuitry is tripped, the DRV591 automatically resets (see application information section for more details).
●The PWM switching frequency may be set to 500 kHz or 100 kHz depending on system requirements. To eliminate external components, the gain is fixed at approximately 2.3 V/V.
● ±3-A Maximum Output Current
● 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
● Internal or External Clock Sync
● PWM Scheme Optimized for EMI
● 9×9 mm PowerPAD Quad Flatpack
● APPLICATIONS
● Thermoelectric Cooler (TEC) Driver
● Laser Diode Biasing
●PowerPAD is a trademark of Texas Instruments.
