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參數(shù)資料
| 型號(hào)： | NJM3770AD3 |
| 廠商： | New Japan Radio Co., Ltd. |
| 元件分類： | 基準(zhǔn)電壓源/電流源 |
| 英文描述： | STEPPER MOTOR DRIVER |
| 中文描述： | 步進(jìn)電機(jī)驅(qū)動(dòng)器 |
| 文件頁(yè)數(shù)： | 7/10頁(yè) |
| 文件大?。?/td> | 173K |
| 代理商： | NJM3770AD3 |
NJM3770A
T
C
E
MA
MB
V
VR
NJM3770A
8
7
9
4, 5
12, 13
1
Phase
A
I1A
I0A
1
15
Diodes are
UF 100 ns
t
Phase
I
1
I
0
T
C
E
V
V
V
GND
M
A
M
B
NJM3770A
11
6
3,14
8
7
9
2
10
16
4, 5
12, 13
MOTOR
0.5
820pF
820pF
1k
56 k
0.5
CC
V
MM
MM
CC
R
10
16
820pF
1k
15
V
MM
6
3,14
11
V (+5V)
2
56 k
820pF
Phase
A
I1A
I0A
0
I
I
1
Phase
GND
V
CC
MM
I
APPLICATIONS INFORMATION
Motor selection
Some stepper motors are not designed for continuous operation at maximum current. As the circuit drives a
constant current through the motor, its temperature can increase, both at low- and high-speed operation.
Some stepper motors have such high core losses that they are not suited for switched-mode operation.
Interference
As the circuit operates with switched-mode current regulation, interference-generation problems can arise in some
applications. A good measure is then to decouple the circuit with a 0.1
μ
F ceramic capacitor, located near the
package across the power line V
and ground.
Also make sure that the V
Ref
input is sufficiently decoupled. An electrolytic capacitor should be used in the +5 V
rail, close to the circuit.
The ground leads between R
, C
and circuit GND should be kept as short as possible. This applies also to the
leads connecting R
and R
to pin 16 and pin 10 respectively.
In order to minimize electromagnetic interference, it is recommended to route M
and M
leads in parallel on the
printed circuit board directly to the terminal connector. The motor wires should be twisted in pairs, each phase
separately, when installing the motor system.
Unused inputs
Unused inputs should be connected to proper voltage levels in order to obtain the highest possible noise immunity.
Ramping
A stepper motor is a synchronous motor and does not change its speed due to load variations. This means that the
torque of the motor must be large enough to match the combined inertia of the motor and load for all operation
modes. At speed changes, the requires torque increases by the square, and the required power by the cube of the
speed change. Ramping, i.e., controlled acceleration or deceleration must then be considered to avoid motor pull-
out.
V
CC
, V
MM
The supply voltages, V
and V
, can be turned on or off in any order. Normal dv/dt values are assumed.
Before a driver circuit board is removed from its system, all supply voltages must be turned off to avoid destruc-
tive transients being generated by the motor.
Switching frequency
The motor inductance, together with the pulse time, t
, determines the switching frequency of the current regulator.
The choice of motor may then require other values on the R
,
C
components than those recommended in figure 3,
to obtain a switching frequency above the audible range. Switching frequencies above 40 kHz are not recom-
mended because the current regulation can be affected.
Figure 7. Typical stepper motor driver application with NJM3770A
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| NJM3770AFM2 | STEPPER MOTOR DRIVER |
| NJM3771 | DUAL STEPPER MOTOR DRIVER |
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| NJM3771FM2 | DUAL STEPPER MOTOR DRIVER |
| NJM3771E3 | DUAL STEPPER MOTOR DRIVER |
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|---|---|
| NJM3770AE2 | 功能描述:馬達(dá)/運(yùn)動(dòng)/點(diǎn)火控制器和驅(qū)動(dòng)器 Stepping Motor Driver RoHS:否 制造商:STMicroelectronics 產(chǎn)品:Stepper Motor Controllers / Drivers 類型:2 Phase Stepper Motor Driver 工作電源電壓:8 V to 45 V 電源電流:0.5 mA 工作溫度:- 25 C to + 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:HTSSOP-28 封裝:Tube |
| NJM3770AE2-TE2 | 功能描述:馬達(dá)/運(yùn)動(dòng)/點(diǎn)火控制器和驅(qū)動(dòng)器 Stepping Motor Driver RoHS:否 制造商:STMicroelectronics 產(chǎn)品:Stepper Motor Controllers / Drivers 類型:2 Phase Stepper Motor Driver 工作電源電壓:8 V to 45 V 電源電流:0.5 mA 工作溫度:- 25 C to + 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:HTSSOP-28 封裝:Tube |
| NJM3770AFM2 | 功能描述:馬達(dá)/運(yùn)動(dòng)/點(diǎn)火控制器和驅(qū)動(dòng)器 Stepping Motor Driver RoHS:否 制造商:STMicroelectronics 產(chǎn)品:Stepper Motor Controllers / Drivers 類型:2 Phase Stepper Motor Driver 工作電源電壓:8 V to 45 V 電源電流:0.5 mA 工作溫度:- 25 C to + 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:HTSSOP-28 封裝:Tube |
| NJM3770AFM2-TE2 | 功能描述:馬達(dá)/運(yùn)動(dòng)/點(diǎn)火控制器和驅(qū)動(dòng)器 Stepper RoHS:否 制造商:STMicroelectronics 產(chǎn)品:Stepper Motor Controllers / Drivers 類型:2 Phase Stepper Motor Driver 工作電源電壓:8 V to 45 V 電源電流:0.5 mA 工作溫度:- 25 C to + 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:HTSSOP-28 封裝:Tube |
| NJM3770AFM2-TE3 | 功能描述:馬達(dá)/運(yùn)動(dòng)/點(diǎn)火控制器和驅(qū)動(dòng)器 Stepping Motor Driver RoHS:否 制造商:STMicroelectronics 產(chǎn)品:Stepper Motor Controllers / Drivers 類型:2 Phase Stepper Motor Driver 工作電源電壓:8 V to 45 V 電源電流:0.5 mA 工作溫度:- 25 C to + 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:HTSSOP-28 封裝:Tube |
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