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DRV8821DCAR Datasheet(PDF) 3 Page - Texas Instruments |
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DRV8821DCAR Datasheet(HTML) 3 Page - Texas Instruments |
3 / 32 page 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 28 27 26 25 24 23 22 21 20 ABDECAY AOUT1 VM VM AOUT2 AISEN ABSTEP ABUSM0 ABDIR ABVREF BISEN CDVREF CDDECAY ABENBLn V3P3 BOUT2 BOUT1 CDSTEP CDUSM0 CDDIR CDENBLn 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 32 31 30 29 PGND PGND PGND PGND PGND PGND Solder these pins to copper heatsink area PGND PGND PGND PGND PGND VCP CP2 CP1 VM DOUT2 DISEN DOUT1 VM ABUSM1 ABRESETn CISEN COUT2 CDRESETn COUT1 CDUSM1 PGND Solder these pins to copper heatsink area DRV8821 www.ti.com SLVS912J – JANUARY 2009 – REVISED JANUARY 2016 5 Pin Configuration and Functions DCA Package 48-Pin HTSSOP Top View Pin Functions PIN I/O(1) DESCRIPTION EXTERNAL COMPONENTS OR CONNECTIONS NAME NO. POWER AND GROUND VM 1,2, Connect all VM pins together to motor supply voltage. — Motor supply voltage (multiple pins) (4 pins) 23, 24 Bypass each VM to GND with a 0.1-µF, 35-V ceramic capacitor. V3P3 16 — 3.3 V regulator output Bypass to GND with 0.47- μF, 6.3-V ceramic capacitor. GND 10-15, — Power ground (multiple pins) Connect all PGND pins to GND and solder to copper heatsink areas. 34-39 CP1 7 IO Charge pump flying capacitor Connect a 0.01- μF capacitor between CP1 and CP2 CP2 8 IO VCP 9 IO Charge pump storage capacitor Connect a 0.1- μF, 16 V ceramic capacitor to VM MOTOR AB ABSTEP 45 I Motor AB step input Rising edge causes the indexer to move one step. ABDIR 43 I Motor AB direction input Level sets the direction of stepping. ABUSM0 44 I Motor AB microstep mode 0 USM0 and USM1 set the step mode - full step, half step, quarter step, or eight microsteps/step. ABUSM1 41 I Motor AB microstep mode 1 ABENBLn 42 I Motor AB enable input Logic high to disable motor AB outputs, logic low to enable. Active-low reset input initializes the indexer logic and disables the H- ABRESETn 40 I Motor AB reset input bridge outputs for motor AB. ABDECAY 6 I Motor AB decay mode Logic low for slow decay mode, high for mixed decay. Motor AB current set reference ABVREF 17 I Sets current trip threshold. voltage AOUT1 5 O Bridge A output 1 Connect to first coil of bipolar stepper motor AB, or DC motor winding. AOUT2 3 O Bridge A output 2 AISEN 4 — Bridge A current sense Connect to current sense resistor for bridge A. (1) Directions: i = input, O = output, OZ = 3-state output, OD = open-drain ouput, IO = input/ouput Copyright © 2009–2016, Texas Instruments Incorporated Submit Documentation Feedback 3 Product Folder Links: DRV8821 |
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