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A4982SLPTR-T 参数 Datasheet PDF下载

A4982SLPTR-T图片预览
型号: A4982SLPTR-T
PDF下载: 下载PDF文件 查看货源
内容描述: DMOS细分驱动器与转换器和过流保护 [DMOS Microstepping Driver with Translator and Overcurrent Protection]
分类和应用: 驱动器转换器运动控制电子器件信号电路光电二极管电动机控制
文件页数/大小: 19 页 / 522 K
品牌: ALLEGRO [ ALLEGRO MICROSYSTEMS ]
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A4982
DMOS Microstepping Driver with Translator
and Overcurrent Protection
Features and Benefits
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
μA
No smoke no fire (NSNF) compliance (ET package)
Description
The A4982 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 sixteenth-step
modes, with an output drive capacity of up to 35 V and ±2 A.
The A4982 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.
The translator is the key to the easy implementation of the
A4982. 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 A4982 interface is an ideal fit for applications where a
complex microprocessor is unavailable or is overburdened.
During stepping operation, the chopping control in the A4982
automatically selects the current decay mode, Slow or Mixed.
Packages
:
with exposed thermal pad
5 mm × 5 mm × 0.90 mm
(ET package)
24-pin TSSOP
with exposed thermal pad
(LP Package)
32-contact QFN
Approximate size
Continued on the next page…
Typical Application Diagram
V
DD
0.22
μF
VREG ROSC
VDD
5 kΩ
Microcontroller or
Controller Logic
SLEEP
STEP
MS1
MS2
DIR
ENABLE
RESET
VREF
GND
GND
OUT2A
OUT2B
SENSE2
CP1
CP2
VCP
0.1
μF
0.1
μF
0.22
μF
VBB1
VBB2
OUT1A
100
μF
A4982
OUT1B
SENSE1
4982-DS