- 您现在的位置：买卖IC网 > PDF目录1773 > A4979GLPTR-T (Allegro Microsystems Inc)IC MOTOR DRVR MICRO STEP 28TSSOP PDF资料下载
参数资料
| 型号： | A4979GLPTR-T |
| 厂商： | Allegro Microsystems Inc |
| 文件页数： | 29/44页 |
| 文件大小： | 0K |
| 描述： | IC MOTOR DRVR MICRO STEP 28TSSOP |
| 特色产品： | A4979 Series |
| 标准包装： | 1 |
| 应用： | 直流电机驱动器，PWM 电机驱动器，步进电机驱动器 |
| 评估套件： | 可供 |
| 输出数： | 1 |
| 电流 - 输出： | 1.5A |
| 电压 - 负载： | 7 V ~ 50 V |
| 电源电压： | 3 V ~ 5.5 V |
| 工作温度： | -40°C ~ 105°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 28-SOIC（0.173"，4.40mm 宽）裸露焊盘 |
| 供应商设备封装： | 28-TSSOP 裸露焊盘 |
| 包装： | 标准包装 |
| 其它名称： | 620-1463-6 |
第1页第2页第3页第4页第5页第6页第7页第8页第9页第10页第11页第12页第13页第14页第15页第16页第17页第18页第19页第20页第21页第22页第23页第24页第25页第26页第27页第28页当前第29页第30页第31页第32页第33页第34页第35页第36页第37页第38页第39页第40页第41页第42页第43页第44页
A4979
Microstepping Programmable Stepper Motor Driver
With Stall Detect and Short Circuit Protection
first two rows are the entries for Q1 of phase A.
Step 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
Q1
Value 0 5 11 18 23 29 35 40 44 48 52 55 58 60 62 63
Step 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16
Q2
Value 5 11 18 23 29 35 40 44 48 52 55 58 60 62 63 63
The second two rows are the entries for Q2 of phase A. The Step
Angle Number in the third row increases from 16 to 31, this time
from right to left, but the same default values still increase from
left to right. A single value is therefore placed in more than one
location in the table. Shown outlined above, steps 4 and 28 both
contain the value 23.
The same principal can be applied to Q3 and Q4 of phase A. In
this case the mirror image is in the horizontal axis, about the zero
reference value. Although the current in Q3 and Q4 for phase A is
effectively negative, the negation is provided by controlling the
direction of the current. The current control scheme still operates
using positive values.
As shown in the following table, the table of values can be
extended to include Q3 and Q4 with the current direction indi-
cated in the last column. Note that the same value is now applied
to four locations in the full 360-degree electrical cycle.
There are two exceptions to this data distribution principal. These
are the zero value and the maximum value:
? The values in phase A steps 0 and 32 and phase B steps 16 and
48 are always set to zero and cannot be programmed.
? The maximum value, PT(15), is distributed to only two Step
Angle Numbers in each phase. These are the points in the cycle
where the peak current is required, namely phase A steps 16 and
48 and phase B steps 0 and 32.
Each of the 16 values written to the phase table is a 6-bit num-
ber that determines the current trip point for the associated step.
The highest value, 63, represents the maximum phase current,
I PMAX , defined in the section of the specification on phase cur-
rent control. Other numbers represent a percentage of I PMAX . For
example, the number 23 sets the phase current trip point to 23/63
= 36.51% of I PMAX .
There are two restrictions when using the phase table load capa-
bility:
? The required current profile must conform to the symmetry
shown in figure 10. The forward (positive) current part must be
symmetrical about Step Angle Number16 for phase A and about 0
for phase B. The reverse (negative) current part must be sym-
Step 0
Value 0
Step
Value
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
5 11 18 23 29 35 40 44 48 52 55 58 60 62 63
31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16
5 11 18 23 29 35 40 44 48 52 55 58 60 62 63 63
Q1 FWD
Q2 FWD
Step 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47
Value 0 5 11 18 23 29 35 40 44 48 52 55 58 60 62 63
Q3 Rev
Step
Value
63 62 61 60 59 58 57 56 55 54 53 52 51 50 49 48
5 11 18 23 29 35 40 44 48 52 55 58 60 62 63 63
Q4 Rev
Shown outlined above, steps 4, 28, 36, and 60 all contain the
value 23.
The other phase, phase B, uses the same values as phase A but
shifted back by 16 Step Angle Numbers. The full distribution of
the value entered in step 4 of phase A is highlighted in figure 12
(and shown in table 7). This single value is used in a total of eight
locations. The same distribution of values applies to all the values
in steps 1 to 15. These values are defined in the A4979 as PT(0)
to PT(14), respectively.
Figure 12. Digitizing the example current profile
Allegro MicroSystems, LLC
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
29
相关PDF资料 |
PDF描述 |
|---|---|
| A4980KLPTR-T | IC STEPPER DVR PROGR 28-TSSOP |
| A4982SLPTR-T | IC DRIVER MICROSTEPPING 24-TSSOP |
| A4983SETTR-T | IC MOTOR DRIVER MICROSTEP 28-QFN |
| A4984SLPTR-T | IC STEPPER MOTOR DRIVER 24TSSOP |
| A4985SETTR-T | IC STEPPER MOTOR DRIVER 32QFN |
相关代理商/技术参数 |
参数描述 |
|---|---|
| A4980 | 制造商:ALLEGRO 制造商全称:Allegro MicroSystems 功能描述:The A4980 is a flexible microstepping motor driver with built-in translator for easy operation. |
| A4980KLP-T | 制造商:Allegro MicroSystems LLC 功能描述: |
| A4980KLPTR-T | 功能描述:IC STEPPER DVR PROGR 28-TSSOP RoHS:是 类别:集成电路 (IC) >> PMIC - 电机和风扇控制器，驱动器 系列:- 标准包装:1 系列:- 应用:步进电机驱动器，1-2 相，2 相 评估套件:- 输出数:1 电流 - 输出:800mA 电压 - 负载:10 V ~ 28 V 电源电压:4.75 V ~ 5.25 V 工作温度:-20°C ~ 90°C 安装类型:表面贴装 封装/外壳:28-SOP + 2 翼片裸露焊盘 供应商设备封装:28-HSOPHC（15.2x7.9） 包装:剪切带 (CT) 其它名称:869-1268-1 |
| A4982 | 制造商:ALLEGRO 制造商全称:Allegro MicroSystems 功能描述:DMOS Microstepping Driver with Translator And Overcurrent Protection |
| A4982_V4 | 制造商:ALLEGRO 制造商全称:Allegro MicroSystems 功能描述:DMOS Microstepping Driver with Translator And Overcurrent Protection |
发布紧急采购，3分钟左右您将得到回复。