A3966

更新时间： 2024-02-04 21:36:44

品牌	Logo	应用领域
急速微 - ALLEGRO		驱动器
页数	文件大小	规格书
12页	201K
描述
DUAL FULL-BRIDGE PWM MOTOR DRIVER

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技术参数
数据手册

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A3966 技术参数

是否无铅：	不含铅	是否Rohs认证：	符合
生命周期：	Active	零件包装代码：	SOIC
包装说明：	SOP, SOP16,.4	针数：	16
Reach Compliance Code：	compliant	ECCN代码：	EAR99
HTS代码：	8542.39.00.01	风险等级：	1.66
Samacsys Confidence：	3	Samacsys Status：	Released
2D Presentation：	https://componentsearchengine.com/2D/0T/755.1.1.png	Schematic Symbol：	https://componentsearchengine.com/symbol.php?partID=755
PCB Footprint：	https://componentsearchengine.com/footprint.php?partID=755	3D View：	https://componentsearchengine.com/viewer/3D.php?partID=755
Samacsys PartID：	755	Samacsys Image：	https://componentsearchengine.com/Images/9/A3966SLBTR-T.jpg
Samacsys Thumbnail Image：	https://componentsearchengine.com/Thumbnails/1/A3966SLBTR-T.jpg	Samacsys Pin Count：	16
Samacsys Part Category：	Integrated Circuit	Samacsys Package Category：	Small Outline Packages
Samacsys Footprint Name：	16 SOICW	Samacsys Released Date：	2015-07-02 00:00:00
Is Samacsys：	N	其他特性：	ALSO REQUIRES VCC TO 30V VBB SUPPLY
模拟集成电路 - 其他类型：	STEPPER MOTOR CONTROLLER	JESD-30 代码：	R-PDSO-G16
JESD-609代码：	e3	长度：	10.3 mm
湿度敏感等级：	3	功能数量：	2
端子数量：	16	最高工作温度：	85 °C
最低工作温度：	-20 °C	最大输出电流：	0.75 A
封装主体材料：	PLASTIC/EPOXY	封装代码：	SOP
封装等效代码：	SOP16,.4	封装形状：	RECTANGULAR
封装形式：	SMALL OUTLINE	峰值回流温度（摄氏度）：	260
电源：	5 V	认证状态：	Not Qualified
座面最大高度：	2.65 mm	子类别：	Motion Control Electronics
最大供电电流 (Isup)：	50 mA	最大供电电压 (Vsup)：	5.5 V
最小供电电压 (Vsup)：	4.75 V	标称供电电压 (Vsup)：	5 V
表面贴装：	YES	技术：	BIPOLAR
温度等级：	OTHER	端子面层：	Matte Tin (Sn)
端子形式：	GULL WING	端子节距：	1.27 mm
端子位置：	DUAL	处于峰值回流温度下的最长时间：	40
宽度：	7.5 mm	Base Number Matches：	1

A3966 数据手册

3966

DUAL FULL-BRIDGE

PWM MOTOR DRIVER

FUNCTIONAL DESCRIPTION (continued)

Load Current Regulation. Due to internal logic and

switching delays (t_d), the actual load current peak will be

slightly higher than the I_TRIPvalue. These delays, plus the

blanking time, limit the minimum value the current control

circuitry can regulate. To produce zero current in a

winding, the ENABLE terminal should be held high,

turning off all output drivers for that H-bridge.

Miscellaneous Information. Thermal protection

circuitry turns off all output drivers should the junction

temperature reach +165 °C (typical). This is intended

only to protect the device from failures due to excessive

junction temperatures and should not imply that output

short circuits are permitted. Normal operation is resumed

when the junction temperature has decreased about 15 °C.

The A3966 current control employs a fixed-fre-

quency, variable duty cycle PWM technique. As a result,

the current-control regulation may become unstable if the

duty cycle exceeds 50%.

Logic Inputs. A logic high on the PHASE input results

in current flowing from OUT_Ato OUT_Bof that H-bridge.

A logic low on the PHASE input results in current flowing

from OUT_Bto OUT_A. An internally generated dead time

(t_codt) of approximately 1 µs prevents cross-over current

spikes that can occur when switching the PHASE input.

To minimize current-sensing inaccuracies caused by

ground trace I_Rdrops, each current-sensing resistor

should have a separate return to the ground terminal of

the device. For low-value sense resistors, the I•R drops

in the printed-wiring board can be significant and should

be taken into account. The use of sockets should be

avoided as their contact resistance can cause variations in

the effective value of R_S.

A logic high on the ENABLE input turns off all four

output drivers of that H-bridge. This results in a fast

current decay through the internal ground clamp and

flyback diodes. A logic low on the ENABLE input turns

on the selected source and sink driver of that H-bridge.

The ENABLE inputs can be pulse-width modulated for

applications that require a fast current-decay PWM. If

external current-sensing circuitry is used, the internal

current-control logic can be disabled by connecting the

R_TC_Tterminal to ground.

The LOAD SUPPLY terminal, V_BB, should be

decoupled with an electrolytic capacitor (47 µF recom-

mended) placed as close to the device as physically

practical. To minimize the effect of system ground IR

drops on the logic and reference input signals, the system

ground should have a low-resistance return to the load

supply voltage.

The REFERENCE input voltage is typically set with a

resistor divider from V_CC. This reference voltage is

internally divided down by 4 to set up the current-com-

parator trip-voltage threshold. The reference input voltage

range is 0 to 2 V.

The frequency of the clock oscillator will determine

the amount of ripple current. A lower frequency will

result in higher current ripple, but reduced heating in the

motor and driver IC due to a corresponding decrease in

hysteretic core losses and switching losses respectively.

A higher frequency will reduce ripple current, but will

increase switching losses and EMI.

Output Drivers. To minimize on-chip power dissipation,

the sink drivers incorporate a Satlington™ structure. The

Satlington output combines the low V_CE(sat)features of a

saturated transistor and the high peak-current capability of

a Darlington (connected) transistor. A graph showing

typical output saturation voltages as a function of output

current is on the next page.

115 Northeast Cutoff, Box 15036

Worcester, Massachusetts 01615-0036 (508) 853-5000

1...3 4 567 8 9...12

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与A3966相关器件

型号	品牌	描述	获取价格	数据表
A3966SA	ALLEGRO	DUAL FULL-BRIDGE PWM MOTOR DRIVER	获取价格
A3966SLB	ALLEGRO	DUAL FULL-BRIDGE PWM MOTOR DRIVER	获取价格
A3966SLB-T	ALLEGRO	DUAL FULL-BRIDGE PWM MOTOR DRIVER	获取价格
A3966SLBTR	ALLEGRO	Stepper Motor Controller, 0.75A, BIPolar, PDSO16, PLASTIC, SOIC-16	获取价格
A3966SLBTR-T	ALLEGRO	DUAL FULL-BRIDGE PWM MOTOR DRIVER	获取价格
A3967	ALLEGRO	MICROSTEPPING DRIVER WITH TRANSLATOR	获取价格

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