DRV8844 Datasheet, PDF (3/17 Pages) Texas Instruments – QUAD 1/2-H-BRIDGE DRIVER IC

DRV8844
www.ti.com
SLVSBA2 – JULY 2012
Table 1. TERMINAL FUNCTIONS
NAME
PIN
POWER AND GROUND
VNEG
6, 9, 14,
28, PPAD
LGND
19
I/O ⁽¹⁾
DESCRIPTION
-
Negative power supply (dual supplies) or
ground (single supply)
I
Logic input reference ground
VM
4, 11
-
Main power supply
V3P3OUT
15
CP1
1
CP2
2
VCP
3
CONTROL
IN1
27
EN1
26
IN2
25
EN2
24
IN3
23
EN3
22
IN4
21
EN4
20
nRESET
16
nSLEEP
STATUS
nFAULT
OUTPUT
OUT1
OUT2
OUT3
OUT4
NO CONNECT
NC
17
18
5
7
10
8
12, 13
O
3.3-V regulator output
IO
Charge pump flying capacitor
IO
Charge pump flying capacitor
IO
High-side gate drive voltage
I
Channel 1 input
I
Channel 1 enable
I
Channel 2 input
I
Channel 2 enable
I
Channel 3 input
I
Channel 3 enable
I
Channel 4 input
I
Channel 4 enable
I
Reset input
I
Sleep mode input
OD
Fault
O
Output 1
O
Output 2
O
Output 3
O
Output 4
-
No connect
EXTERNAL COMPONENTS
OR CONNECTIONS
Connect to logic ground. This may be any
voltage between VNEG and VM - 8 V.
Connect to motor supply (8 V - 60 V). Both
pins must be connected to same supply.
Bypass to VNEG with a 10-µF (minimum)
capacitor.
Bypass to VNEG with a 0.47-μF 6.3-V
ceramic capacitor. Can be used to supply
VREF.
Connect a 0.01-μF 100-V capacitor between
CP1 and CP2.
Connect a 0.1-μF 16-V ceramic capacitor to
VM.
Logic input controls state of OUT1. Internal
pulldown.
Logic high enables OUT1. Internal pulldown.
Logic input controls state of OUT2. Internal
pulldown.
Logic high enables OUT2. Internal pulldown.
Logic input controls state of OUT3. Internal
pulldown.
Logic high enables OUT3. Internal pulldown.
Logic input controls state of OUT4. Internal
pulldown.
Logic high enables OUT4. Internal pulldown.
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.
Logic low when in fault condition (overtemp,
overcurrent, UVLO). Open-drain output.
Connect to loads.
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
Product Folder Link(s): DRV8844
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