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A3982 の電気的特性と機能

A3982のメーカーはAllegroです、この部品の機能は「DMOS Stepper Motor Driver」です。


製品の詳細 ( Datasheet PDF )

部品番号
A3982
部品説明
DMOS Stepper Motor Driver
メーカ
Allegro
ロゴ

Allegro ロゴ 




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A3982 Datasheet, A3982 PDF,ピン配置, 機能
A3982
DMOS Stepper Motor Driver with Translator
Features and Benefits
Low RDS(on) outputs
Automatic current decay mode detection/selection
Mixed and Slow current decay modes
Synchronous rectification for low power dissipation
Internal UVLO and thermal shutdown circuitry
Crossover-current protection
Package: 24 pin SOICW with internally
fused leads (suffix LB)
Description
The A3982 is a complete stepper motor driver with built-
in translator for easy operation. It is designed to operate
bipolar stepper motors in full- and half-step modes, with an
output drive capacity of up to 35 V and ±2 A. The A3982
includes a fixed off-time current regulator which has the
ability to operate in Slow or Mixed decay modes.
The translator is the key to the easy implementation of the
A3982. Simply inputting one pulse on the STEP input drives
the motor one step. There are no phase sequence tables, high
frequency control lines, or complex interfaces to program.
The A3982 interface is an ideal fit for applications where a
complex microprocessor is unavailable or is overburdened.
The chopping control in the A3982 automatically selects
the current decay mode (Slow or Mixed). When a signal
occurs at the STEP input pin, the A3982 determines if
that step results in a higher or lower current in each of the
motor phases. If the change is to a higher current, then the
decay mode is set to Slow decay. If the change is to a lower
current, then the current decay is set to Mixed (set initially
to a fast decay for a period amounting to 31.25% of the
Not to scale
Continued on the next page…
Pin-out Diagram
OUT2A 1
SENSE2 2
VBB2 3
OUT2B 4
ENABLE 5
PGND 6
PGND 7
CP1 8
CP2 9
VCP 10
VREG 11
MS1 12
24 OUT1A
23 SENSE1
22 VBB1
21 OUT1B
20 DIR
19 PGND
18 PGND
17 REF
16 STEP
15 VDD
14 ROSC
13 RESET
26184.28C
Free Datasheet http://www.Datasheet4U.com

1 Page





A3982 pdf, ピン配列
A3982
DMOS Stepper Motor Driver with Translator
Functional Block Diagram
0.22 μF
0.1 μF
VDD
VREG
Current
Regulator
ROSC
OSC
CP1
CP2
Charge
Pump
VCP
REF
DAC
STEP
DIR
RESET
MS1
Translator
PWM Latch
Blanking
Mixed Decay
Control
Logic
ENABLE
PWM Latch
Blanking
Mixed Decay
DMOS Full Bridge
Gate
Drive
DMOS Full Bridge
VBB1
OUT1A
OUT1B
SENSE1
VBB2
OUT2A
OUT2B
SENSE2
DAC
0.1 μF
RS1
RS2
VREF
Allegro MicroSystems, LLC
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
3
Free Datasheet http://www.Datasheet4U.com


3Pages


A3982 電子部品, 半導体
A3982
DMOS Stepper Motor Driver with Translator
STEP
MS1,
RESET, or DIR
tA
tC tD
tB
Time Duration
STEP minimum, HIGH pulse width
STEP minimum, LOW pulse width
Setup time, input change to STEP
Hold time, input change to STEP
Figure 1. Logic Interface Timing Diagram
Symbol
tA
tB
tC
tD
Typ.
1
1
200
200
Unit
μs
μs
ns
ns
Table 1. Stepping Resolution Truth Table
MS1 Step Resolution Excitation Mode
L Full Step
2 Phase
H Half Step
1-2 Phase
Allegro MicroSystems, LLC
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
6
Free Datasheet http://www.Datasheet4U.com

6 Page

合計 : 11 ページ
PDF ダウンロード

[ A3982 データシート.PDF ]

データシートを活用すると、その部品の主な機能と仕様を詳しく理解できます。 ピン構成、電気的特性、動作パラメータ、性能を確認してください。

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