- 您现在的位置：买卖IC网 > PDF目录16465 > A3982SLBTR (Allegro Microsystems Inc)IC MOTOR DRIVER STEPPER 24-SOIC PDF资料下载
参数资料
| 型号： | A3982SLBTR |
| 厂商： | Allegro Microsystems Inc |
| 文件页数： | 8/11页 |
| 文件大小： | 0K |
| 描述： | IC MOTOR DRIVER STEPPER 24-SOIC |
| 标准包装： | 1,000 |
| 应用： | 步进电机驱动器 |
| 输出数： | 1 |
| 电流 - 输出： | ±2A |
| 电压 - 负载： | 8 V ~ 35 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) |
A3982
DMOS Stepper Motor Driver with Translator
is determined by the selection of an external resistor con-
nected from the ROSC timing pin to ground. If the ROSC
pin is tied to an external voltage > 3 V, then t OFF defaults to
30 μ s. The ROSC pin can be safely connected to the VDD
pin for this purpose. The value of t OFF ( μ s) is approximately
t OFF ≈ R OSC ? 825
Blanking. This function blanks the output of the current
sense comparators when the outputs are switched by the
internal current control circuitry. The comparator outputs
are blanked to prevent false overcurrent detection due to
reverse recovery currents of the clamp diodes, and switching
transients related to the capacitance of the load. The blank
time, t BLANK ( μ s), is approximately
t BLANK ≈ 1 μ s
Charge Pump (CP1 and CP2). The charge pump is
used to generate a gate supply greater than that of VBB
for driving the source-side DMOS gates. A 0.1 μ F ceramic
capacitor, should be connected between CP1 and CP2. In
addition, a 0.1 μ F ceramic capacitor is required between
VCP and VBB, to act as a reservoir for operating the
high-side DMOS gates.
VREG (VREG) . This internally-generated voltage is
used to operate the sink-side DMOS outputs. The VREG
pin must be decoupled with a 0.22 μ F ceramic capacitor to
ground. VREG is internally monitored. In the case of a fault
condition, the DMOS outputs of the A3982 are disabled.
Enable Input (ENABLE) . This input turns on or off all
of the DMOS outputs. When set to a logic high, the outputs
are disabled. When set to a logic low, the internal control
enables the outputs as required. The translator inputs STEP,
DIR, and MS1, as well as the internal sequencing logic, all
remain active, independent of the ENABLE input state.
Shutdown. In the event of a fault, overtemperature
(excess T J ) or an undervoltage (on VCP), the DMOS out-
puts of the A3982 are disabled until the fault condition is
removed. At power-on, the UVLO (undervoltage lockout)
circuit disables the DMOS outputs and resets the translator
to the Home state.
Mixed Decay Operation. The bridge can operate in
Mixed Decay Mode, depending on the step sequence, as
shown in figures 3 thru 5. As the trip point is reached, the
A3982 initially goes into a fast decay mode for 31.25%
of the off-time, t OFF . After that, it switches to Slow Decay
Mode for the remainder of t OFF .
Synchronous Rectification . When a PWM-off cycle
is triggered by an internal fixed–off-time cycle, load current
recirculates according to the decay mode selected by the
control logic. This synchronous rectification feature turns on
the appropriate FETs during current decay, and effectively
shorts out the body diodes with the low DMOS R DSON . This
reduces power dissipation significantly, and can eliminate
the need for external Schottky diodes in many applications.
Turning off synchronous rectification prevents the reversal of
the load current when a zero-current level is detected.
Allegro MicroSystems, LLC
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
8
相关PDF资料 |
PDF描述 |
|---|---|
| A3982SLB | IC MOTOR DRIVER STEPPER 24-SOIC |
| VI-J0M-EX | CONVERTER MOD DC/DC 10V 75W |
| LK2125R10K-T | INDUCTOR MULTILAYER .1UH 0805 |
| A3980KLPTR | IC DRIVER MICROSTEPPING 28-TSSOP |
| ECC25DRYH | CONN EDGECARD 50POS DIP .100 SLD |
相关代理商/技术参数 |
参数描述 |
|---|---|
| A3982SLBTR-T | 功能描述:IC MOTOR DRIVER STEPPER 24-SOIC 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 |
| A3983 | 制造商:ALLEGRO 制造商全称:Allegro MicroSystems 功能描述:DMOS Microstepping Driver with Translator |
| A3983_08 | 制造商:ALLEGRO 制造商全称:Allegro MicroSystems 功能描述:DMOS Microstepping Driver with Translator |
| A3983_10 | 制造商:ALLEGRO 制造商全称:Allegro MicroSystems 功能描述:The A3983 is a complete microstepping motor driver with built-in translator for easy operation. |
| A3983SLP | 功能描述:IC DRIVER MICROSTEPPING 24-TSSOP 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 |
发布紧急采购，3分钟左右您将得到回复。