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NJM3517D2 参数 Datasheet PDF下载

NJM3517D2图片预览
型号: NJM3517D2
PDF下载: 下载PDF文件 查看货源
内容描述: 步进电机控制器/驱动器 [STEPPER MOTOR CONTROLLER / DRIVER]
分类和应用: 驱动器电动机控制电机控制器
文件页数/大小: 12 页 / 191 K
品牌: NJRC [ NEW JAPAN RADIO ]
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NJM3517  
PURPOSE OF EXTERNAL COMPONENTS  
For figures 3 and 4. Note that “Larger than …” is normally the vice versa of  
“Smaller than … .”  
Component Purpose  
Value  
Larger than value Smaller than value  
D1, D2  
Passes low power to I = 1A  
f
motor and prevents  
high power from  
shorting through low  
power supply  
Increases price  
Decreases max  
current capability  
1N4001, UF4001  
D3 … D6  
Inductive current  
supressor  
I = 1A  
f
Increases price  
Decreases current  
turn-off capability  
t
= 100nS  
Slows down turn- Speeds up turn-  
off time. Voltage off time.  
at anode might  
exceed voltage  
breakdown  
rr  
e.g. BYV27  
UF4001  
RGPP10G  
RGPP30D  
R1  
Base drive current  
limitter  
R = 20ohm  
Slows down Q1’s Speeds up Q1’s  
turn-on and Q4’s turn-on and Q4’s  
2
V
mm  
P = R1  
turn-off time.  
turn-off time.  
(
)
R + R  
1
2
R2, R3  
Base discharge resistor R = 240ohm  
V
Slows down Q1’s Speeds up Q1’s  
turn-off and Q4’s turn-off and Q4’s  
2
mm  
P = R1  
turn-on time.  
)
Decreases ext.  
turn-on time.  
(
R + R  
1
2
R4 … R7 External transistor base  
driver  
Increases ext.  
transistor I max. transistor I max.  
V - V - V  
mm be ce  
R =  
C C  
Lowers 3517 Increases 3517  
power dissipation. power dissipation.  
V
be  
I -  
4
(
Check hfe.  
)
R12  
2
P > (I ) • R4  
4
R8, R9  
ØA, ØB pull-up  
resistors  
R = 5kohm @ pull-up Increases noise  
voltage = 5V. sensitivity, worse immunity, better  
logic-level logic-level  
definition definition.  
Increases noise  
2
(V  
)
CC  
P =  
R
Less stress on ØA, Stress on ØA, ØB  
ØB output output  
transistors transistors.  
R10, R11 Limit max. motor  
current. Resistors may  
V
R =  
-V  
mm Motor CESat  
-V  
Decreases motor Increases motor  
current.  
current.  
I
Motor max  
be omitted. (Check  
motor specifications  
first.)  
V
be  
R12 … R15 External transistor base  
discharge.  
Slows down  
Speeds up  
R =  
15  
=
external transistor external transistor  
turn-off time. turn-off time.  
Lowers 3517 Increases 3517  
power dissipation power dissipation  
I
12  
P > V • I  
be 12  
RT, CT  
C1, C2  
Sets L and L on time R = 47kohm, C = 10nf Increases on time. Decreases on time.  
A B  
when triggered by  
STEP.  
P < 250mW  
Stores the doubling  
voltage.  
C = 100µF  
Increases effective Decreases  
on-time during effective on-time  
voltage doubling during voltage  
doubling.  
V 45V  
C
C3 … C5  
Filtering of supply-  
voltage ripple and take-  
up of energy feedback  
from D3 … D6  
C 10 µF  
Increases price, Decreases price,  
better filtering, more compact  
decreases risk of solution.  
IC breakdown  
V
>V  
,V or V Increases price  
ss cc  
Risk for capacitor  
breakdown.  
Rated  
mm  
Q1, Q2  
Q3, Q4  
Activation transistor of  
voltage doubling.  
I
as motor requires. Increases price. Decreases max I  
during voltage  
doubling.  
C
m
- V -V ) • C1  
CE  
(V  
mm  
Charging of voltage  
doubling capacitor  
f
I
=
C
1
- 0.55 • R • C  
T
T
( )  
f
Step  
Increases max  
current capability. current capability.  
Q5 … Q8 Motor current drive  
transistor.  
I
C
as motor requires.  
PNP power trans.  
Decreases max