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DRV8802 Datasheet(数据表) 3 Page - Texas Instruments

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部件型号  DRV8802
说明  DC MOTOR DRIVER IC
下载  18 Pages
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制造商  TI1 [Texas Instruments]
网页  http://www.ti.com
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DRV8802 Datasheet(HTML) 3 Page - Texas Instruments

 
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DRV8802
www.ti.com
SLVSAM9A
– APRIL 2011 – REVISED JUNE 2011
Table 1. TERMINAL FUNCTIONS
EXTERNAL COMPONENTS
NAME
PIN
I/O(1)
DESCRIPTION
OR CONNECTIONS
POWER AND GROUND
GND
14, 28
-
Device ground
VMA
4
-
Bridge A power supply
Connect to motor supply (8 - 45 V). Both pins
must be connected to same supply.
VMB
11
-
Bridge B power supply
Bypass to GND with a 0.47-
μF 6.3-V ceramic
V3P3OUT
15
O
3.3-V regulator output
capacitor. Can be used to supply VREF.
CP1
1
IO
Charge pump flying capacitor
Connect a 0.01-
μF 50-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
AENBL
21
I
Bridge A enable
Logic high to enable bridge A
APHASE
20
I
Bridge A phase (direction)
Logic high sets AOUT1 high, AOUT2 low
AI0
24
I
Sets bridge A current: 00 = 100%,
Bridge A current set
01 = 71%, 10 = 38%, 11 = 0
AI1
25
I
BENBL
22
I
Bridge B enable
Logic high to enable bridge B
BPHASE
23
I
Bridge B phase (direction)
Logic high sets BOUT1 high, BOUT2 low
BI0
26
I
Sets bridge B current: 00 = 100%,
Bridge B current set
01 = 71%, 10 = 38%, 11 = 0
BI1
27
I
Low = brake (slow decay),
DECAY
19
I
Decay (brake) mode
high = coast (fast decay)
Active-low reset input initializes internal logic
nRESET
16
I
Reset input
and disables the H-bridge outputs
Logic high to enable device, logic low to enter
nSLEEP
17
I
Sleep mode input
low-power sleep mode
AVREF
12
I
Bridge A current set reference input
Reference voltage for winding current set.
Can be driven individually with an external
DAC for microstepping, or tied to a reference
BVREF
13
I
Bridge B current set reference input
(e.g., V3P3OUT).
STATUS
Logic low when in fault condition (overtemp,
nFAULT
18
OD
Fault
overcurrent)
OUTPUT
ISENA
6
IO
Bridge A ground / Isense
Connect to current sense resistor for bridge A
ISENB
9
IO
Bridge B ground / Isense
Connect to current sense resistor for bridge B
AOUT1
5
O
Bridge A output 1
Connect to motor winding A
AOUT2
7
O
Bridge A output 2
BOUT1
10
O
Bridge B output 1
Connect to motor winding B
BOUT2
8
O
Bridge B output 2
(1)
Directions: I = input, O = output, OZ = tri-state output, OD = open-drain output, IO = input/output
Copyright
© 2011, Texas Instruments Incorporated
3




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