Datasheet

Logic inputs
To
logic
ESD
Internal
pulldown
Hysteresis
DRV8823
www.ti.com SLVS913D –JANUARY 2009–REVISED JANUARY 2010
TERMINAL FUNCTIONS
NAME NO. I/O
(1)
DESCRIPTION EXTERNAL COMPONENTS OR CONNECTIONS
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 to GND with several 0.1-mF, 35-V ceramic capacitors.
V3P3 16 - 3.3 V regulator output Bypass to GND with 0.47-mF, 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-mF capacitor between CP1 and CP2
CP2 8 IO
VCP 9 IO Charge pump storage capacitor Connect a 0.1-mF, 16 V ceramic capacitor to V
M
MOTOR DRIVERS
Bridge A & B 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 1, or DC motor winding.
AOUT2 3 O Bridge A output 2
ISENA 4 - Bridge A current sense Connect to current sense resistor for bridge A.
BOUT1 48 O Bridge B output 1
Connect to second coil of bipolar stepper motor 1, or DC motor
winding.
BOUT2 46 O Bridge B output 2
ISENB 47 - Bridge B current sense Connect to current sense resistor for bridge B.
Bridge C & D current set reference
CDVREF 18 I Sets current trip threshold.
voltage
COUT1 27 O Bridge C output 1
Connect to first coil of bipolar stepper motor 2, or DC motor winding.
COUT2 25 O Bridge C output 2
ISENC 26 - Bridge C current sense Connect to current sense resistor for bridge C.
DOUT1 22 O Bridge D output 1
Connect to second coil of bipolar stepper motor 2, or DC motor
winding.
DOUT2 20 O Bridge D output 2
ISEND 22 - Bridge D current sense Connect to current sense resistor for bridge D.
SERIAL INTERFACE
SDATA 31 I Serial data input Data is clocked in on rising edge of SCLK.
SCLK 33 I Serial input clock Logic high enables serial data to be clocked in.
SCS 45 I Serial chip select Logic high latches serial data.
SSTB 30 I Serial data strobe Active low resets serial interface and disables outputs.
RESETn 43 I Reset input Active low input disables outputs and charge pump.
SLEEPn 42 I Sleep input
TEST PINS
19, 28,
TEST I Test inputs Do not connect these pins - used for factory test only.
29, 32
(1) Directions: I = input, O = output, OZ = 3-state output, OD = open-drain output, IO = input/output, PU = internal pullup
Figure 1. Logic Inputs
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