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SLOS390A – NOVEMBER 2001– REVISED MAY 2002

±  

  

FEATURES

D ±3-A Maximum Output Current

D Requires External PWM From DC to 1 MHz

With TTL-Compatible Voltages for High and

Low

D Low Supply Voltage Operation: 2.8 V to 5.5 V

D High Efficiency Generates Less Heat

D Over-Current and Thermal Protection

D Fault Indicators for Over-Current, Thermal

and Under-Voltage Conditions

D 9×9 mm PowerPAD Quad Flatpack

APPLICATIONS

D Thermoelectric Cooler (TEC) Driver

D Laser Diode Biasing

DESCRIPTION

The DRV592 is a high-efficiency, high-current H-bridge

ideal for driving a wide variety of thermoelectric cooler

elements in systems powered from 2.8 V to 5.5 V. Low

output stage on-resistance significantly decreases

power dissipation in the amplifier.

The DRV592 may be driven from any external PWM

generator such as a DSP, a microcontroller, or a FPGA.

The frequency may vary from dc (i.e., on or off) to

1 MHz. The inputs are compatible with TTL logic levels.

The DRV592 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 DRV592

automatically resets.

1 µF

AVDD

AGND (Connect to PowerPAD)

FAULT1

FAULT0

IN+

IN–IN–

PVDD

OUT–

PGND

OUT+

PVDD

Shutdown Control

10 µF

VDD

10 µH

10 µF

10 µH

10 µF

1 µF

To TEC or Laser

Diode Anode

To TEC or Laser

Diode Cathode

1 µF

HI-Z

To HI-Z Control

To Fault Monitor

PWM Input 1

PWM Input 2

SHUTDOWN

PowerPAD is a trademark of Texas Instruments.

         

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         

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.

www.ti.com

Summary of content (16 pages)

PAGE 1
www.ti.com SLOS390A – NOVEMBER 2001– REVISED MAY 2002 ± FEATURES DESCRIPTION D ±3-A Maximum Output Current D Requires External PWM From DC to 1 MHz The DRV592 is a high-efficiency, high-current H-bridge ideal for driving a wide variety of thermoelectric cooler elements in systems powered from 2.8 V to 5.5 V. Low output stage on-resistance significantly decreases power dissipation in the amplifier.
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www.ti.com SLOS390A – NOVEMBER 2001– REVISED MAY 2002 This integrated circuit can be damaged by ESD. Texas Instruments recommends that all integrated circuits be handled with appropriate precautions. Failure to observe proper handling and installation procedures can cause damage. ESD damage can range from subtle performance degradation to complete device failure.
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www.ti.com SLOS390A – NOVEMBER 2001– REVISED MAY 2002 ELECTRICAL CHARACTERISTICS over operating free-air temperature range unless otherwise noted PARAMETER TEST CONDITIONS MIN TYP MAX VO Voltage output (measured differentially) VDD = 5 V IO = ±1 A, rds(on) = 65 mΩ IO = ±3 A, rds(on) = 65 mΩ |IIH| High-level input current |IIL| Low-level input current VDD = 5.5V, VDD = 5.5V, VI = VDD VI = 0 V VDD = 5 V, IO = 4 A A, TA = 25°C High side 25 60 95 Low side 25 65 95 VDD = 3.
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www.ti.com SLOS390A – NOVEMBER 2001– REVISED MAY 2002 Terminal Functions TERMINAL NAME NO.
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www.ti.
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www.ti.com SLOS390A – NOVEMBER 2001– REVISED MAY 2002 TYPICAL CHARACTERISTICS EFFICIENCY vs LOAD RESISTANCE EFFICIENCY vs LOAD RESISTANCE 100 100 90 90 PO = 2 W 80 70 PO = 0.5 W 60 50 40 50 40 30 20 20 VDD = 5 V fS = 500 kHz PO = 0.25 W 60 30 10 VDD = 3.3 V fS = 500 kHz 10 0 0 1 2 3 4 5 6 7 8 RL – Load Resistance – Ω 9 1 10 Figure 2 IO = 1 A TA = 25°C 250 Total 150 Low Side 100 High Side 50 0 2.7 3.1 3.5 3.9 4.3 4.
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www.ti.com SLOS390A – NOVEMBER 2001– REVISED MAY 2002 TYPICAL CHARACTERISTICS SUPPLY CURRENT vs SWITCHING FREQUENCY 300 10 VDD = 3.3 V IO = 1 A VFP Package 250 No Load 8 Iq – Supply Current – mA rDS(on) – Drain-Source On-State Resistance – mΩ DRAIN-SOURCE ON-STATE RESISTANCE vs FREE-AIR TEMPERATURE Total 200 150 Low Side 100 High Side VDD = 5 V 6 VDD = 3.
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www.ti.com SLOS390A – NOVEMBER 2001– REVISED MAY 2002 TYPICAL CHARACTERISTICS MAXIMUM OUTPUT CURRENT vs OUTPUT VOLTAGE MAXIMUM OUTPUT CURRENT vs AMBIENT TEMPERATURE 3.5 3.5 I O – Maximum Output Current – A I O – Maximum Output Current – A 3 TJ = 100°C 2.5 TJ = 85°C 2 TJ = 125°C 1.5 1 VDD = 5 V TA = 25°C VFP Package 0.5 0 0 1 2 3 VO – Output Voltage – V 3 2.5 2 1.5 1 0.
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www.ti.com SLOS390A – NOVEMBER 2001– REVISED MAY 2002 APPLICATION INFORMATION L DRIVING EXTERNALLY-GENERATED PWM TO THE DRV592 INPUTS OUT+ C The DRV592 may be simply viewed as a full-H-bridge, with all the gate drive and protection circuitry fully integrated, but with no internal PWM generator. TEC R L OUT– C The inputs may be driven independently with a PWM signal ranging from dc to 1 MHz. The HIGH and LOW levels must be TTL compatible.
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www.ti.com SLOS390A – NOVEMBER 2001– REVISED MAY 2002 LC FILTER IN THE TIME DOMAIN The ripple current of an inductor may be calculated using equation (4): DI + L ǒVO–V TECǓDTs (4) L D + duty cycle (0.5 worst case) POWER SUPPLY DECOUPLING T s + 1ńfs + 1ń500 kHz For VO = 5 V, VTEC = 2.5 V, and L = 10 µH, and a switching frequency of 500 kHz; the inductor ripple current is 250 mA.
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www.ti.com SLOS390A – NOVEMBER 2001– REVISED MAY 2002 and normal operation resumes. During the under-voltage condition, the outputs are high-impedance to prevent over-dissipation due to increased rDS(on). The over-temperature fault is reported when the junction temperature exceeds 130°C. The device continues operating normally until the junction temperature reaches 190°C, at which point the IC is disabled to prevent permanent damage from occurring.
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PACKAGE OPTION ADDENDUM www.ti.com 28-Mar-2008 PACKAGING INFORMATION Orderable Device Status (1) Package Type Package Drawing Pins Package Eco Plan (2) Qty DRV592VFP ACTIVE HLQFP VFP 32 DRV592VFPG4 ACTIVE HLQFP VFP 32 250 Lead/Ball Finish Green (RoHS & no Sb/Br) CU NIPDAU TBD Call TI MSL Peak Temp (3) Level-2-260C-1 YEAR Call TI (1) The marketing status values are defined as follows: ACTIVE: Product device recommended for new designs.
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IMPORTANT NOTICE Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, modifications, enhancements, improvements, and other changes to its products and services at any time and to discontinue any product or service without notice. Customers should obtain the latest relevant information before placing orders and should verify that such information is current and complete.