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1、GVDD GVDD PVDD PVDD M M Controller RESET_AB PWM_B OC_ADJ GND GND_A GND_B OUT_B PVDD_B AGND VREG M3 M2 BST_B BST_C PVDD_C OUT_C RESET_CD PWM_D VDD GVDD_C OUT_D PVDD_D BST_D GVDD_D PWM_C GND_D M1 GND_C GVDD_B OTW FAULT PWM_A GVDD_A BST_A PVDD_A OUT_A DRV8412 DRV8432 SLES242C DECEMBER 2009REVISED MAY 2
2、010 Dual Full Bridge PWM Motor Driver Check for Samples: DRV8412, DRV8432 The DRV8412/32 require two power supplies, one at 1FEATURES 12 V for GVDD and VDD, and another up to 50 V for High-Efficiency Power Stage (up to 97%) with PVDD.TheDRV8412/32canoperateatupto Low RDS(on)MOSFETs (80 m at TJ= 25C)
3、 500-kHzswitchingfrequencywhilestillmaintain Operating Supply Voltage up to 50 V precise control and high efficiency. They also have an (70 V Absolute Maximum) innovative protection system safeguarding the device against a wide range of fault conditions that could DRV8412 (power pad down): up to 2 x
4、 3 A damagethesystem.Thesesafeguardsare Continuous Output Current (2 x 6 A Peak) in short-circuitprotection,overcurrentprotection, Dual Full Bridge Mode or 6 A Continuous undervoltageprotection,andtwo-stagethermal Current in Parallel Mode (12 A Peak) protection. The DRV8412/32 have a current-limitin
5、g DRV8432 (power pad up): up to 2 x 7 A circuit that prevents device shutdown during load Continuous Output Current ( 2 x 12 A Peak) in transients such as motor start-up. A programmable Dual Full Bridge Mode or 14 A Continuousovercurrent detector allows adjustable current limit andprotectionleveltom
6、eetdifferentmotorCurrent in Parallel Mode (24 A Peak) requirements. PWM Operating Frequency up to 500 kHz The DRV8412/32 have unique independent supply Integrated Self-Protection Circuits Including and ground pins for each half bridge, which makes it Undervoltage, Overtemperature, Overload, and poss
7、ible to provide current measurement through Short Circuit external shunt resistor and support multiple motors Programmable Cycle-by-Cycle Current Limit with different power supply voltage requirements. Protection Simplified Application DiagramIndependent Supply and Ground Pins for Each Half Bridge I
8、ntelligent Gate Drive and Cross Conduction Prevention No External Snubber or Schottky Diode is Required APPLICATIONS Brushed DC and Stepper Motors Three Phase Permanent Magnet Synchronous Motors Robotic and Haptic Control System Actuators and Pumps Precision Instruments TEC Drivers DESCRIPTION The D
9、RV8412/32 are high performance, integrated dual full bridge motor drivers with an advanced protection system. Because of the low RDS(on)of the H-Bridge MOSFETs and intelligent gate drive design, the efficiency of these motor drivers can be up to 97%, which enables the use of smaller power supplies a
10、nd heatsinks, and are good candidates for energy efficient applications. 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.
11、PRODUCTION DATA information is current as of publication date. Copyright 20092010, 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. DRV8412 DRV8432
12、 SLES242C DECEMBER 2009REVISED MAY 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 perfo
13、rmance degradation to complete device failure. Precision integrated circuits may be more susceptible to damage because very small parametric changes could cause the device not to meet its published specifications. ABSOLUTE MAXIMUM RATINGS Over operating free-air temperature range unless otherwise no
14、ted (1) VALUE VDD to GND0.3 V to 13.2 V GVDD_X to GND0.3 V to 13.2 V PVDD_X to GND_X (2) 0.3 V to 70 V OUT_X to GND_X (2) 0.3 V to 70 V BST_X to GND_X (2) 0.3 V to 80 V Transient peak output current (per pin), pulse width limited by internal over-current protection circuit.16 A Transient peak output
15、 current for latch shut down (per pin)20 A VREG to AGND0.3 V to 4.2 V GND_X to GND0.3 V to 0.3 V GND to AGND0.3 V to 0.3 V PWM_X to GND0.3 V to 4.2 V OC_ADJ, M1, M2, M3 to AGND0.3 V to 4.2 V RESET_X, FAULT, OTW to GND0.3 V to 7 V Maximum continuous sink current (FAULT, OTW)9 mA Maximum operating jun
16、ction temperature range, TJ-40C to 150C Storage temperature, TSTG55C to 150C (1)Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated under Recommended Operating Conditions is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliabil
