说明

The DRV593 and DRV594 are high-efficiency, high-current power amplifiers ideal for driving a wide variety of thermoelectric cooler elements in systems powered from 2.8 V to 5.5 V. The operation of the device requires only one inductor and capacitor for the output filter, saving significant printed-circuit board area. Pulse-width modulation (PWM) operation and low output stage on-resistance significantly decrease power dissipation in the amplifier.

The DRV593 and DRV594 are internally protected against thermal and current overloads. Logic-level fault indicators signal when the junction temperature has reached approximately 128°C to allow for system-level shutdown before the amplifier’s internal thermal shutdown circuitry activates.

特性

• Operation Reduces Output Filter Size and Cost
  by 50% Compared to DRV591
• ±3-A Maximum Output Current
• Low Supply Voltage Operation: 2.8 V to 5.5 V
• High Efficiency Generates Less Heat
• Overcurrent and Thermal Protection
• Fault Indicators for Overcurrent, Thermal and
  Undervoltage Conditions
• Two Selectable Switching Frequencies
• Internal or External Clock Sync
• PWM Scheme Optimized for EMI
• 9×9 mm PowerPAD™ Quad Flatpack Package
• APPLICATIONS
  • Thermoelectric Cooler (TEC) Driver
  • Laser Diode Biasing

PowerPAD is a trademark of Texas Instruments