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| 型号： | A3967SLBTR |
| 厂商： | Allegro Microsystems Inc |
| 文件页数： | 6/15页 |
| 文件大小： | 0K |
| 描述： | IC MOTOR DRIVER PWM FULL 24SOIC |
| 标准包装： | 1,000 |
| 应用： | 步进电机驱动器 |
| 输出数： | 1 |
| 电流 - 输出： | ±750mA |
| 电压 - 负载： | 4.75 V ~ 30 V |
| 电源电压： | 3 V ~ 5.5 V |
| 工作温度： | -20°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 24-SOIC（0.295"，7.50mm 宽） |
| 供应商设备封装： | 24-SOIC W |
| 包装： | 带卷 (TR) |
A3967
Microstepping Driver with Translator
Functional Description (cont’d)
RC Blanking. In addition to the ? xed off-time of the
PWM control circuit, the C T component sets the compara-
tor blanking time. This function blanks the output of the
current-sense comparator when the outputs are switched by
the internal current-control circuitry. The comparator out-
put is blanked to prevent false overcurrent detection due
to reverse recovery currents of the clamp diodes, and/or
switching transients related to the capacitance of the load.
The blank time t BLANK can be approximated by:
t BLANK = 1400C T
Enable Input (ENABLE). This active-low input enables
all of the outputs. When logic high the outputs are dis-
abled. Inputs to the translator (STEP, DIRECTION, MS 1 ,
MS 2 ) are all active independent of the ENABLE input
state.
Shutdown. In the event of a fault (excessive junction
temperature) the outputs of the device are disabled until
the fault condition is removed. At power up, and in the
event of low V CC , the under-voltage lockout (UVLO)
circuit disables the drivers and resets the translator to the
home state.
Sleep Mode (SLEEP). An active-low control input used
to minimize power consumption when not in use. This dis-
ables much of the internal circuitry including the outputs.
A logic high allows normal operation and startup of the
device in the home position.
Percent Fast Decay Input (PFD). When a STEP input
signal commands a lower output current from the previous
step, it switches the output current decay to either slow-,
fast-, or mixed-decay depending on the voltage level at the
PFD input. If the voltage at the PFD input is greater than
0.6V CC then slow-decay mode is selected. If the voltage on
the PFD input is less than 0.21V CC then fast-decay mode is
selected. Mixed decay is between these two levels.
Mixed Decay Operation. If the voltage on the PFD in-
put is between 0.6V CC and 0.21V CC , the bridge will oper-
ate in mixed-decay mode depending on the step sequence
(see ? gures). As the trip point is reached, the device will
go into fast-decay mode until the voltage on the RC termi-
nal decays to the voltage applied to the PFD terminal. The
time that the device operates in fast decay is approximated
by:
t FD = R T C T In (0.6V CC /V PFD )
After this fast decay portion, t FD , the device will
switch to slow-decay mode for the remainder of the ? xed
off-time period.
2.5
T A = +25 ° C
2.0
SOURCE DRIVER
1.5
1.0
Typical output saturation voltages show-
ing Satlington sink-driver operation.
0.5
SINK DRIVER
0
200
300
4 0 0
500
600
7 0 0
OUTPUT CURRENT IN MILLIAMPERES
Dwg. GP-064-1A
Allegro MicroSystems, LLC
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
6
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| A3967SLB | IC MOTOR DRIVER PWM FULL 24SOIC |
相关代理商/技术参数 |
参数描述 |
|---|---|
| A3967SLBTR-T | 功能描述:IC MOTOR DRIVER PWM FULL 24SOIC 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 |
| A3967SLBTR-T-CUT | 制造商:Allegro MicroSystems LLC 功能描述: |
| A3968 | 制造商:ALLEGRO 制造商全称:Allegro MicroSystems 功能描述:Dual Full-Bridge PWM Motor Driver |
| A3968SA | 功能描述:IC MOTOR DRIVER PWM DUAL 16-DIP RoHS:否 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:直流电机驱动器，步进电机驱动器 评估套件:- 输出数:1 或 2 电流 - 输出:750mA 电压 - 负载:10 V ~ 40 V 电源电压:4.5 V ~ 5.5 V 工作温度:-20°C ~ 70°C 安装类型:表面贴装 封装/外壳:24-BFSOP（0.295"，7.50mm 宽） 供应商设备封装:24-SOP 包装:Digi-Reel® 其它名称:MTS62C19A-HS105DKR |
| A3968SLB | 功能描述:IC MOTOR DRIVER PWM DUAL 16SOIC RoHS:否 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:直流电机驱动器，步进电机驱动器 评估套件:- 输出数:1 或 2 电流 - 输出:750mA 电压 - 负载:10 V ~ 40 V 电源电压:4.5 V ~ 5.5 V 工作温度:-20°C ~ 70°C 安装类型:表面贴装 封装/外壳:24-BFSOP（0.295"，7.50mm 宽） 供应商设备封装:24-SOP 包装:Digi-Reel® 其它名称:MTS62C19A-HS105DKR |
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