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DRV594VFP Datasheet(PDF) 1 Page - Texas Instruments |
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DRV594VFP Datasheet(HTML) 1 Page - Texas Instruments |
1 / 27 page ActualSize 9mmSquare 1 µF AVDD AGND (Connect to PowerPAD) ROSC COSC AREF IN+ IN− IN− H/C PGND PGND PGND PGND PGND PGND PWM 120 k Ω 220 pF 1 µF Shutdown Control 1 k Ω 1 k Ω DC Control Voltage 10 µF VDD 10 µH 1 µF FAULT1 FAULT0 To TEC or Laser Diode Anode To TEC or Laser Diode Cathode 1 µF SHUTDOWN DRV593 DRV594 10 µF DRV593 DRV594 www.ti.com SLOS401C – OCTOBER 2002 – REVISED JULY 2010 ±3-A HIGH-EFFICIENCY PWM POWER DRIVER Check for Samples: DRV593, DRV594 1 FEATURES DESCRIPTION 2 • Operation Reduces Output Filter Size and Cost by 50% Compared to DRV591 The DRV593 and DRV594 are high-efficiency, high-current power amplifiers ideal for driving a wide • ±3-A Maximum Output Current variety of thermoelectric cooler elements in systems • Low Supply Voltage Operation: 2.8 V to 5.5 V powered from 2.8 V to 5.5 V. The operation of 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 dissipation in the amplifier. • Two Selectable Switching Frequencies The DRV593 and DRV594 are internally protected • Internal or 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 Package system-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 circuitry is tripped, the • Laser Diode Biasing devices automatically reset (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 2.3 V/V for the DRV593. For the DRV594, the gain is fixed at 14.5 V/V. 1 Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet. 2 PowerPAD is a trademark of Texas Instruments. PRODUCTION DATA information is current as of publication date. Copyright © 2002–2010, Texas Instruments Incorporated Products conform to specifications per the terms of the Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters. |
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