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| 型号： | A4979GLPTR-T |
| 厂商： | Allegro Microsystems Inc |
| 文件页数： | 18/44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 |
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A4979
Microstepping Programmable Stepper Motor Driver
With Stall Detect and Short Circuit Protection
An optional simple odd parity scheme is included to provide
some measure of error checking, if required. Each 6-bit value
can be supplemented with an additional parity bit, PTP, to ensure
an odd number of 1s in the transmission. This is checked by the
A4979 and if a the number of 1s in the value plus parity bit is not
odd, the FF bit will be set and the SDO pin will go high the next
time STRn is taken low, indicating a parity error. That data will
still be written to the next phase table value address; it is incum-
bent upon the external controller to take action, if required.
If the write sequence is broken (by a reset, by writing to another
register, or by a data transfer error) before the sequence has been
completed, then the phase table value address will be reset to
PT(0). If it is required to load the table, then the entire 16-value
sequence must be sent.
After loading, although the phase current table is volatile, a reset
using a low pulse on the RESETn pin does not corrupt the table.
The table is only reset to default values on a power-on reset.
Diagnostic Registers
The diagnostic registers comprise two read-only fault data regis-
ters. Access is described in the section Reading from Diagnostic
Registers, above.
The diagnostic registers contain fault flags for each fault condi-
tion and are reset to all 0s on the completion of each serial access.
They are also reset to all 0s each time the RESETn input is low
for longer than the Reset Pulse Width, t RST . FAULT0 is set to
all 1s at power-up or after a power-on reset. This indicates to the
external controller that a power-on reset has taken place and all
registers have been reset. Note that a power-on reset only occurs
when the V DD supply rises above its undervoltage threshold.
Power-on reset function is not affected by the state of the motor
supply or V REG .
The first bit in both registers is the Fault Register flag, FF. This
is high if any bits in FAULT0 are set, or if a serial write error or
parity error has occurred.
Allegro MicroSystems, LLC
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
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| 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 |
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| 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: |
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| 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 |
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