Datasheet

DRV8844
www.ti.com SLVSBA2A –JULY 2012–REVISED OCTOBER 2012
Table 1. TERMINAL FUNCTIONS
EXTERNAL COMPONENTS
NAME PIN I/O
(1)
DESCRIPTION
OR CONNECTIONS
POWER AND GROUND
6, 9, 14, Negative power supply (dual supplies) or
VNEG -
28, PPAD ground (single supply)
Connect to logic ground. This may be any
LGND 19 I Logic input reference ground
voltage between VNEG and VM - 8 V.
Connect to motor supply (8 V - 60 V). Both
pins must be connected to same supply.
VM 4, 11 - Main power supply
Bypass to VNEG with a 10-µF (minimum)
capacitor.
Bypass to VNEG with a 0.47-μF 6.3-V
V3P3OUT 15 O 3.3-V regulator output ceramic capacitor. Can be used to supply
VREF.
CP1 1 IO Charge pump flying capacitor
Connect a 0.01-μF 100-V capacitor between
CP1 and CP2.
CP2 2 IO Charge pump flying capacitor
Connect a 0.1-μF 16-V ceramic capacitor to
VCP 3 IO High-side gate drive voltage
VM.
CONTROL
Logic input controls state of OUT1. Internal
IN1 27 I Channel 1 input
pulldown.
EN1 26 I Channel 1 enable Logic high enables OUT1. Internal pulldown.
Logic input controls state of OUT2. Internal
IN2 25 I Channel 2 input
pulldown.
EN2 24 I Channel 2 enable Logic high enables OUT2. Internal pulldown.
Logic input controls state of OUT3. Internal
IN3 23 I Channel 3 input
pulldown.
EN3 22 I Channel 3 enable Logic high enables OUT3. Internal pulldown.
Logic input controls state of OUT4. Internal
IN4 21 I Channel 4 input
pulldown.
EN4 20 I Channel 4 enable Logic high enables OUT4. Internal pulldown.
Active-low reset input initializes internal logic
nRESET 16 I Reset input and disables the H-bridge outputs. Internal
pulldown.
Logic high to enable device, logic low to enter
nSLEEP 17 I Sleep mode input
low-power sleep mode. Internal pulldown.
STATUS
Logic low when in fault condition (overtemp,
nFAULT 18 OD Fault
overcurrent, UVLO). Open-drain output.
OUTPUT
OUT1 5 O Output 1
OUT2 7 O Output 2
Connect to loads.
OUT3 8 O Output 3
OUT4 10 O Output 4
NO CONNECT
NC 12, 13 - No connect No connection to these pins
(1) Directions: I = input, O = output, OZ = tri-state output, OD = open-drain output, IO = input/output
Copyright © 2012, Texas Instruments Incorporated Submit Documentation Feedback 3
Product Folder Links: DRV8844