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DRV8821DCAR Datasheet(PDF) 11 Page - Texas Instruments |
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DRV8821DCAR Datasheet(HTML) 11 Page - Texas Instruments |
11 / 32 page A OU T 1 A OU T2 BOU T1 B OU T2 Step Motor VM VM A IS EN B ISEN APH A SE Pre- drive Pre- drive VC P, VGD VM VM + - PW M V CP, VGD + - PW M A BVR EF OC P OC P OC P OC P A BD EC A Y B EN BL DAC DAC A = 5 A = 5 A I[2:0] B I[2:0] 3 3 AEN B L BPH A SE A I[2:0] 3 From Indexer Logic DRV8821 www.ti.com SLVS912J – JANUARY 2009 – REVISED JANUARY 2016 Feature Description (continued) Figure 10. Block Diagram Note that there are multiple VM motor power supply pins. All VM pins must be connected together to the motor supply voltage. 7.3.2 Current Regulation The PWM chopping current is set by a comparator which compares the voltage across a current sense resistor connected to the xISEN pins, multiplied by a factor of 5, with a reference voltage. The reference voltage is input from the xVREF pin. Copyright © 2009–2016, Texas Instruments Incorporated Submit Documentation Feedback 11 Product Folder Links: DRV8821 |
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