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DRV594-DRV594VFP-DRV594VFPR
+/-3 A High-Efficiency PWM Power Driver
Actual Size
9mm Square
10 μF
VDD
To TEC or Laser
Diode Anode
1 μF
DRV593
DRV594
±3-A HIGH-EFFICIENCY PWM POWER DRIVER
Checkfor Samples: DRV593, DRV594
1FEATURES
DESCRIPTION Operation Reduces Output Filter Size and Cost 50% Comparedto DRV591 The DRV593 and DRV594 are high-efficiency,
high-current power amplifiers ideal for drivinga wide
• ±3-A Maximum Output Currentvarietyof thermoelectric cooler elementsin systems
• Low Supply Voltage Operation: 2.8Vto 5.5V powered from 2.8Vto 5.5V. The operationof the
• High Efficiency Generates Less Heat device requires only one inductor and capacitor for
Overcurrent and Thermal Protection the output filter, saving significant printed-circuit
board area. Pulse-width modulation (PWM) operation
• Fault Indicators for Overcurrent, Thermal and and low output stage on-resistance significantly
Undervoltage Conditions decrease power dissipationin the amplifier.
• Two Selectable Switching FrequenciesThe DRV593 and DRV594 are internally protected
• Internalor External Clock Sync against thermal and current overloads. Logic-level
• PWM Scheme Optimized for EMI fault indicators signal when the junction temperature
has reached approximately 128°C to allow for
• 9×9 mm PowerPAD™ Quad Flatpack Packagesystem-level shutdown before the amplifier's internal
thermal shutdown circuitry activates. The fault
APPLICATIONS indicators also signal when an overcurrent event has
• Thermoelectric Cooler (TEC) Driver occurred.If the overcurrent circuitryis tripped, the
• Laser Diode Biasing devices automatically reset (see application
information sectionfor more details).
The PWM switching frequency maybe setto 500 kHz 100 kHz depending on system requirements. To
eliminate external components, the gainis fixedat
2.3 V/V for the DRV593. For the DRV594, the gainis
fixedat 14.5 V/V.
