DRV8843_15 Datasheet, PDF (3/20 Pages) Texas Instruments – DUAL H-BRIDGE DRIVER IC

DRV8843
www.ti.com
SLVSAS8C – APRIL 2011 – REVISED AUGUST 2013
Table 1. TERMINAL FUNCTIONS
NAME
PIN
POWER AND GROUND
GND
14, 28
VMA
4
VMB
11
V3P3OUT
15
CP1
1
CP2
2
VCP
3
CONTROL
AIN1
21
AIN2
20
AI0
24
AI1
25
BIN1
22
BIN2
23
BI0
26
BI1
27
DECAY
19
nRESET
16
nSLEEP
17
AVREF
12
BVREF
13
STATUS
nFAULT
18
OUTPUT
ISENA
6
ISENB
9
AOUT1
5
AOUT2
7
BOUT1
10
BOUT2
8
I/O ⁽¹⁾
DESCRIPTION
-
Device ground
-
Bridge A power supply
-
Bridge B power supply
O
3.3-V regulator output
IO
Charge pump flying capacitor
IO
Charge pump flying capacitor
IO
High-side gate drive voltage
I
Bridge A input 1
I
Bridge A input 2
I
Bridge A current set
I
I
Bridge B input 1
I
Bridge B input 2
I
Bridge B current set
I
I
Decay mode
I
Reset input
I
Sleep mode input
I
Bridge A current set reference input
I
Bridge B current set reference input
OD
Fault
IO
Bridge A ground / Isense
IO
Bridge B ground / Isense
O
Bridge A output 1
O
Bridge A output 2
O
Bridge B output 1
O
Bridge B output 2
EXTERNAL COMPONENTS
OR CONNECTIONS
Connect to motor supply (8.2 - 45 V). Both
pins must be connected to same supply.
Bypass to GND with a 0.47-μF 6.3-V ceramic
capacitor. Can be used to supply VREF.
Connect a 0.01-μF 50-V capacitor between
CP1 and CP2.
Connect a 0.1-μF 16-V ceramic capacitor and
a 1-MΩ resistor to VM.
Logic input controls state of AOUT1. Internal
pulldown.
Logic input controls state of AOUT2. Internal
pulldown.
Sets bridge A current: 00 = 100%,
01 = 71%, 10 = 38%, 11 = 0
Internal pulldown.
Logic input controls state of BOUT1. Internal
pulldown.
Logic input controls state of BOUT2. Internal
pulldown.
Sets bridge B current: 00 = 100%,
01 = 71%, 10 = 38%, 11 = 0
Internal pulldown.
Low = slow decay, open = mixed decay,
high = fast decay
Internal pulldown and pullup.
Active-low reset input initializes internal logic
and disables the H-bridge outputs. Internal
pulldown.
Logic high to enable device, logic low to enter
low-power sleep mode. Internal pulldown.
Reference voltage for winding current set.
Can be driven individually with an external
DAC for microstepping, or tied to a reference
(e.g., V3P3OUT).
Logic low when in fault condition (overtemp,
overcurrent)
Connect to current sense resistor for bridge A
Connect to current sense resistor for bridge B
Connect to motor winding A
Connect to motor winding B
(1) Directions: I = input, O = output, OZ = tri-state output, OD = open-drain output, IO = input/output
Copyright © 2011–2013, Texas Instruments Incorporated
Product Folder Links: DRV8843
Submit Documentation Feedback
3