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 amplifier’s 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.

• Audio input type
• PWM
• Load (Min) (ohms)
• 1
• Iq (Typ) (mA)
• 4.6
• Control interface
• Shutdown Mode
• Closed/open loop
• Closed
• Analog supply (Min) (V)
• 2.8
• Analog supply (Max) (V)
• 5.5
• Sampling rate (Max) (kHz)
• 500
• Operating temperature range (C)
• -40 to 85

DRV591的完整型号有：DRV591VFP、DRV591VFPR，以下是这些产品的关键参数及官网采购报价：

DRV591VFP，工作温度：-40 to 85，封装：HLQFP (VFP)-32，包装数量MPQ：250个，MSL 等级/回流焊峰值温度：Level-3-260C-168 HR，引脚镀层/焊球材料：NIPDAU，TI官网DRV591VFP的批量USD价格：10.164（1000+）

DRV591VFPR，工作温度：PropertyValue，封装：HLQFP (VFP)-32，包装数量MPQ：1000个，MSL 等级/回流焊峰值温度：Level-3-260C-168 HR，引脚镀层/焊球材料：NIPDAU，TI官网DRV591VFPR的批量USD价格：8.47（1000+）

DRV591EVM — DRV591 评估模块 (EVM)

The DRV591 is a high-efficiency, high-current power amplifier ideal for driving a wide variety of thermo-electric 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.

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