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| 型号： | A3953SLBTR-T |
| 厂商： | Allegro Microsystems Inc |
| 文件页数： | 11/12页 |
| 文件大小： | 0K |
| 描述： | IC MOTOR DRIVER PWM FULL 16-SOIC |
| 标准包装： | 1 |
| 应用： | PWM 电机驱动器 |
| 输出数： | 1 |
| 电流 - 输出： | ±1.3A |
| 电压 - 负载： | 3 V ~ 50 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： | 16-SOIC（0.295"，7.50mm 宽） |
| 供应商设备封装： | 16-SOIC W |
| 包装： | 标准包装 |
| 产品目录页面： | 1140 (CN2011-ZH PDF) |
| 其它名称： | 620-1133-6 |
A3953
the need to generate a variable analog voltage reference. In this
case, a dc voltage on the REF input is used typically to limit the
maximum load current.
In dc servo applications, which require accurate positioning
at low or zero speed, PWM of the PHASE input is selected
typically. This simplifies the servo control loop because the
transfer function between the duty cycle on the PHASE input and
the average voltage applied to the motor is more linear than in the
case of ENABLE PWM control (which produces a discontinuous
current at low current levels).
With bidirectional dc servo motors, the PHASE terminal can be
used for mechanical direction control. Similar to when braking
the motor dynamically, abrupt changes in the direction of a
rotating motor produces a current generated by the back-EMF.
The current generated will depend on the mode of operation. If
the internal current control circuitry is not being used, then the
maximum load current generated can be approximated by I LOAD =
(V BEMF + V BB )/R LOAD where V BEMF is proportional to the motor ’s
speed. If the internal slow current-decay control circuitry is used,
then the maximum load current generated can be approximated
by I LOAD = V BEMF /R LOAD . For both cases care must be taken to
ensure that the maximum ratings of the device are not exceeded.
If the internal fast current-decay control circuitry is used, then the
Full-Bridge PWM Motor Driver
load current will regulate to a value given by:
I LOAD = V REF /R S .
CAUTION : In fast current-decay mode, when the direction of
the motor is changed abruptly, the kinetic energy stored in the
motor and load inertia will be converted into current that charges
the V BB supply bulk capacitance (power supply output and
decoupling capacitance). Care must be taken to ensure that the
capacitance is sufficient to absorb the energy without exceeding
the voltage rating of any devices connected to the motor supply.
See also the Brake Operation section, above.
Soldering Considerations . The lead (Pb) free (100%
matte tin) plating on lead terminations is 100% backward-
compatible for use with traditional tin-lead solders of any
composition, at any temperature of soldering that has been
traditionally used for that tin-lead solder alloy. Further, 100%
matte tin finishes solder well with tin-lead solders even at
temperatures below 232°C. This is because the matte tin dissolves
easily in the tin-lead. Additional information on soldering is
available on the Allegro Web site, www.allegromicro.com.
Figure 4 — Typical Application
Allegro MicroSystems, Inc.
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
10
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| A3955SB | 功能描述:IC MOTOR DRIVER PWM FULL 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 |
| A3955SB-T | 功能描述:IC MOTOR DRIVER PWM FULL 16-DIP 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: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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