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A8905CLB

更新时间： 2024-01-10 16:47:26
品牌 Logo 应用领域
急速微 - ALLEGRO 驱动器电动机控制电机控制器
页数 文件大小 规格书
12页 164K
描述
3-PHASE BRUSHLESS DC MOTOR CONTROLLER/DRIVER WITH BACK-EMF SENSING

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A8905CLB 技术参数

是否Rohs认证： 不符合生命周期：Obsolete
包装说明：SOP,Reach Compliance Code：unknown
风险等级：5.92驱动类型：OPTICAL
接口集成电路类型：CD MOTOR DRIVERJESD-30 代码：R-PDSO-G24
JESD-609代码：e0长度：15.4 mm
功能数量：1端子数量：24
最高工作温度：70 °C最低工作温度：
封装主体材料：PLASTIC/EPOXY封装代码：SOP
封装形状：RECTANGULAR封装形式：SMALL OUTLINE
峰值回流温度（摄氏度）：NOT SPECIFIED认证状态：Not Qualified
座面最大高度：2.65 mm最大供电电压：5.5 V
最小供电电压：4.5 V标称供电电压：5 V
表面贴装：YES技术：NMOS
温度等级：COMMERCIAL端子面层：Tin/Lead (Sn/Pb)
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：NOT SPECIFIED
宽度：7.5 mmBase Number Matches：1

A8905CLB 数据手册

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8905  
3-PHASE BRUSHLESS DC MOTOR  
CONTROLLER/DRIVER WITH BACK-EMF SENSING  
The A8905CLB isw a three-phase brushless dc motor controller/  
driver for use with CD-ROM or DVD drives. The three half-bridge  
outputs are low on-resistance n-channel DMOS devices capable of  
driving up to 1.25 A. The A8905CLB provides complete, reliable,  
self-contained back-EMF sensing motor startup and running algorithms.  
A programmable digital frequency-locked loop speed control circuit  
together with the linear current control circuitry provides precise motor  
speed regulation.  
LOAD  
SUPPLY  
COMMUTATION  
DELAY  
1
24  
23  
C
V
D1  
BB  
DATA IN  
C
2
3
4
D2  
22 CLOCK  
21  
C
WD  
C
CHIP SELECT  
ST  
20 RESET  
OUT  
5
6
A
A serial port allows the user to program various features and modes  
of operation, such as the speed control parameters, startup current limit,  
sleep mode, diagnostic modes, and others.  
19  
18  
GROUND  
GROUND  
GROUND  
GROUND  
7
8
OUT  
B
DATA OUT  
OSCILLATOR  
MUX  
17  
16  
15  
APPLICATIONS  
9
OUT  
C
FLL  
V
■ CD-ROMs  
■ DVDs  
LOGIC  
SUPPLY  
CENTERTAP 10  
DD  
BOOST  
CHARGE  
PUMP  
14  
13  
INDEX  
FILTER  
BRAKE  
11  
12  
FEATURES  
C
RES  
■ DMOS Outputs  
Dwg. PP-040-1  
■ Low rDS(on)  
■ Startup Commutation Circuitry  
■ Back-EMF Commutation Circuitry  
■ Serial Port Interface  
■ Frequency-Locked Loop Speed Control  
■ Tachometer Signal Input  
■ Programmable Start-Up Current  
■ Diagnostics Mode  
ABSOLUTE MAXIMUM RATINGS  
at TA = +25°C  
Load Supply Voltage, VBB . . . . . . 14 V  
Output Current, IOUT . . . . . . . . ±1.25 A  
Logic Supply Voltage, VDD . . . . 6.0 V  
Logic Input Voltage Range,  
VIN . . . . . . . -0.3 V to VDD + 0.3 V  
Package Power Dissipation,  
■ Sleep Mode  
PD . . . . . . . . . . . . . . . . See Graph  
Operating Temperature Range,  
■ Linear Current Control  
■ Internal Current Sensing  
■ Dynamic Braking Through Serial Port  
■ Power-Down Dynamic Braking  
■ System Diagnostics Data Out  
■ Data Out Ported in Real Time  
■ Internal Thermal Shutdown Circuitry  
TA . . . . . . . . . . . . . . 0°C to +70°C  
Junction Temperature, TJ . . . +150°C†  
Storage Temperature Range,  
TS . . . . . . . . . . . . -55°C to +150°C  
† Fault conditions that produce excessive  
junction temperature will activate device thermal  
shutdown circuitry. These conditions can be  
tolerated, but should be avoided.  
Output current rating may be restricted to a value  
determined by system concerns and factors.  
These include: system duty cycle and timing,  
ambient temperature, and use of any heatsinking  
and/or forced cooling. For reliable operation, the  
specified maximum junction temperature should  
not be exceeded.  
Always order by complete part number, e.g., A8905CLB .  
1234567...12

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