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参数资料
| 型号： | A4985SETTR-T |
| 厂商： | Allegro Microsystems Inc |
| 文件页数： | 1/22页 |
| 文件大小： | 0K |
| 描述： | IC STEPPER MOTOR DRIVER 32QFN |
| 特色产品： | A498x Motor Driver Family |
| 标准包装： | 1 |
| 应用： | 步进电机驱动器 |
| 评估套件： | 可供 |
| 输出数： | 1 |
| 电流 - 输出： | ± 1A |
| 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： | 32-VFQFN 裸露焊盘 |
| 供应商设备封装： | 32-QFN 裸露焊盘（5x5） |
| 包装： | 标准包装 |
| 其它名称： | 620-1457-6 |
A4985
DMOS Microstepping Driver with Translator
And Overcurrent Protection
Features and Benefits
Description
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Low R DS(ON) outputs
Automatic current decay mode detection/selection
Mixed and Slow current decay modes
Synchronous rectification for low power dissipation
Internal UVLO
Crossover-current protection
3.3 and 5 V compatible logic supply
Thin profile QFN and TSSOP packages
Thermal shutdown circuitry
Short-to-ground protection
Shorted load protection
Low current Sleep mode, < 10 μ A
No smoke no fire (NSNF) compliance (ET package)
The A4985 is a complete microstepping motor driver with
built-in translator for easy operation. It is designed to operate
bipolar stepper motors in full-, half-, quarter-, and eighth-step
modes. Step modes are selectable by MSx logic inputs. It has
an output drive capacity of up to 35 V and ±1 A. The A4985
includes a fixed off-time current regulator which has the ability
to operate in Slow or Mixed decay modes.
The ET package meets customer requirements for no smoke
no fire (NSNF) designs by adding no-connect pins between
critical output, sense, and supply pins. So, in the case of a
pin-to-adjacent-pin short, the device does not cause smoke
or fire. Additionally, the device does not cause smoke or fire
when any pin is shorted to ground or left open.
Packages:
24-contact QFN
with exposed thermal pad
4 mm × 4 mm × 0.75 mm
(ES package)
32-contact QFN
with exposed thermal pad
5 mm × 5 mm × 0.90 mm
(ET package)
The translator is the key to the easy implementation of the
A4985. Simply inputting one pulse on the STEP input drives
the motor one microstep. There are no phase sequence tables,
high frequency control lines, or complex interfaces to program.
The A4985 interface is an ideal fit for applications where a
complex microprocessor is unavailable or is overburdened.
During stepping operation, the chopping control in the A4985
automatically selects the current decay mode, Slow or Mixed.
In Mixed decay mode, the device is set initially to a fast decay
for a proportion of the fixed off-time, then to a slow decay for
the remainder of the off-time. Mixed decay current control
results in reduced audible motor noise, increased step accuracy,
and reduced power dissipation.
24-pin TSSOP
with exposed thermal pad
(LP Package)
Continued on the next page…
Typical Application Diagram
V DD
0.22 μ F
0.1 μ F
0.1 μ F
0.22 μ F
5 k Ω
VREG ROSC
VDD
CP1
CP2
VCP
VBB1
VBB2
100 μ F
Microcontroller or
Controller Logic
SLEEP
STEP
MS1
A4985
OUT1A
OUT1B
SENSE1
MS2
4985-DS, Rev. 4
DIR
ENABLE
RESET
VREF
GND
GND
OUT2A
OUT2B
SENSE2
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相关代理商/技术参数 |
参数描述 |
|---|---|
| A4985SLPTR | 制造商:Allegro MicroSystems LLC 功能描述:DMOS Microstepping Driver |
| A4985SLPTR-T | 功能描述:IC STEPPER MOTOR DRIVER 24TSSOP 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 |
| A4986 | 制造商:ALLEGRO 制造商全称:Allegro MicroSystems 功能描述:DMOS Dual Full-Bridge PWM Motor Driver With Overcurrent Protection |
| A4986_12 | 制造商:ALLEGRO 制造商全称:Allegro MicroSystems 功能描述:DMOS Dual Full-Bridge PWM Motor Driver With Overcurrent Protection |
| A4986SESTR-T | 制造商:Allegro MicroSystems LLC 功能描述:IC MOTOR DRIVER PAR 24QFN 制造商:ALLEGRO 功能描述:2A DUAL FULL BRDG W/2 BIT DAC W/OCP 制造商:Allegro MicroSystems LLC 功能描述:2A DUAL FULL BRDG W/2 BIT DAC W/OCP |
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