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參數(shù)資料
| 型號(hào)： | DRV8825PWP |
| 廠(chǎng)商： | TEXAS INSTRUMENTS INC |
| 元件分類(lèi)： | 運(yùn)動(dòng)控制電子 |
| 英文描述： | BRUSH DC MOTOR CONTROLLER, PDSO28 |
| 封裝： | GREEN, PLASTIC, HTSSOP-28 |
| 文件頁(yè)數(shù)： | 16/22頁(yè) |
| 文件大?。?/td> | 628K |
| 代理商： | DRV8825PWP |
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SLVSA73C
– APRIL 2010 – REVISED MAY 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 (8.2 - 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
Logic high to disable device outputs and
nENBL
21
I
Enable input
indexer operation, logic low to enable. Internal
pulldown.
Logic high to enable device, logic low to enter
nSLEEP
17
I
Sleep mode input
low-power sleep mode. Internal pulldown.
Rising edge causes the indexer to move one
STEP
22
I
Step input
step
DIR
20
I
Direction input
Level sets the direction of stepping
MODE0
24
I
Microstep mode 0
MODE0 - MODE2 set the step mode - full,
MODE1
25
I
Microstep mode 1
1/2, 1/4, 1/8/ 1/16, or 1/32 step
MODE2
26
I
Microstep mode 2
Low = slow decay, open = mixed decay,
DECAY
19
I
Decay mode
high = fast decay.
Internal pulldown and pullup.
Active-low reset input initializes the indexer
nRESET
16
I
Reset input
logic and disables the H-bridge outputs.
Internal pulldown.
AVREF
12
I
Bridge A current set reference input
Reference voltage for winding current set.
Normally AVREF and BVREF are connected
to the same voltage. Can be connected to
BVREF
13
I
Bridge B current set reference input
V3P3OUT.
STATUS
nHOME
27
OD
Home position
Logic low when at home state of step table
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 bipolar stepper motor winding A.
Positive current is AOUT1
→ AOUT2
AOUT2
7
O
Bridge A output 2
BOUT1
10
O
Bridge B output 1
Connect to bipolar stepper motor winding B.
Positive current is BOUT1
→ BOUT2
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
2010–2011, Texas Instruments Incorporated
3
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