AMIS-30421 Datasheet, PDF (12/41 Pages) ON Semiconductor – Micro-Stepping Stepper Motor Bridge Controller

AMIS−30421
TYPICAL APPLICATION SCHEMATIC
C8
Reset
SPI Interface
Motor Positioner
Diagnostics
Position
Feedback
C₃
C₂
C₄
VDD
38
41
39
40
VDD
10
GXTR
7
C₅
GXTL
4
MOTXN
6
VREGH
13
C₇
MOTXP
3
GXBL
2
GXBR
5
WD
17
CLK
18
CS
19
DI
20
DO
21
NXT
23
DIR
24
CLR
16
ERR
15
SLA
14
AMIS−30421
11
37
42
RSENSXP
8
RSENSXN
9
GYTR
27
GYTL
30
MOTYN
28
MOTYP
31
GYBL
32
GYBR
29
RSENSYP
26
RSENSYN
25
C₆
R₆
T₁
T₂
T₃
T₄
R1
T5
T6
T₇
T₈
R₂
C₁
D1
V_BAT
M
Figure 9. Typical Application Schematic AMIS−30421
Table 6. EXTERNAL COMPONENTS LIST AND DESCRIPTION
Component
Function
C₁
C₂
C₃
C₄
C₅, C₈
C₆
C₇
R₁, R₂
R₆
D₁
T₁ … T₈
V_BB buffer capacitor (Note 1)
Charge−pump pumping capacitor
Charge−pump buffer capacitor
V_BB decoupling capacitor (Note 2)
V_DD buffer capacitor
Low pass filter SLA
VREGH buffer capacitor
Sense Resistors
Low pass filter SLA
Optional reverse protection diode
H−Bridge N−MOSFET
10. ESR < 1 W.
11. ESR < 50 mW.
Typ Value
Tolerance
Unit
100
±20%
mF
220
± 20%
nF
220
±20%
nF
100
±20%
nF
100
±20 %
nF
1
±20%
nF
4.7
±20%
uF
>25
±1%
mW
5.6
±1%
kW
MBRD1045
NTD4815N or
NTD4813N or
NTD40N03R or
NTD5807N
http://onsemi.com
12