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参数资料
| 型号： | A4950KLJTR-T |
| 厂商： | Allegro Microsystems Inc |
| 文件页数： | 7/9页 |
| 文件大小： | 0K |
| 描述： | IC MOTOR DVR FULL-BRIDGE 8-SOIC |
| 标准包装： | 1 |
| 应用： | 直流电机驱动器，PWM 电机驱动器 |
| 评估套件： | * |
| 输出数： | 1 |
| 电流 - 输出： | 3.5A |
| 电压 - 负载： | 8 V ~ 40 V |
| 工作温度： | -40°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 8-SOIC（0.154"，3.90mm Width）裸露焊盘 |
| 供应商设备封装： | 8-SOICN 裸露焊盘 |
| 包装： | 标准包装 |
| 其它名称： | 620-1470-6 |
A4950
Full-Bridge DMOS PWM Motor Driver
Application Information
Sense Pin (LSS)
In order to use PWM current control, a low-value resistor is
placed between the LSS pin and ground for current sensing pur-
poses. To minimize ground-trace IR drops in sensing the output
current level, the current sensing resistor should have an indepen-
dent ground return to the star ground point. This trace should be
as short as possible. For low-value sense resistors, the IR drops in
the PCB can be significant, and should be taken into account.
When selecting a value for the sense resistor be sure not to
exceed the maximum voltage on the LSS pin of ±500 mV at
maximum load. During overcurrent events, this rating may be
exceeded for short durations.
Ground
A star ground should be located as close to the A4950 as possible.
The copper ground plane directly under the exposed thermal pad
of the device makes a good location for the star ground point. The
exposed pad can be connected to ground for this purpose.
Layout
The PCB should have a thick ground plane. For optimum
electrical and thermal performance, the A4950 must be soldered
directly onto the board. On the underside of the A4950 package is
an exposed pad, which provides a path for enhanced thermal dis-
sipation. The thermal pad must be soldered directly to an exposed
surface on the PCB in order to achieve optimal thermal conduc-
tion. Thermal vias are used to transfer heat to other layers of the
PCB.
The load supply pin, VBB, should be decoupled with an electro-
lytic capacitor (typically 100 μ F) in parallel with a lower valued
ceramic capacitor placed as close as practicable to the device.
GND
GND
A4950
Solder
Trace (2 oz.)
Signal (1 oz.)
OUT2
PCB
Ground (1 oz.)
Thermal (2 oz.)
RS
Thermal Vias
C1
OUT1
A4950
C2
VBB
1 GND
OUT2
BULK
CAPACITANCE
IN2
PAD
LSS
R S
IN1
OUT1
GND
Bill of Materials
GND
VREF
VBB
C1
C2
V BB
Item
1
2
3
Reference
RS
C1
C2
Value
0.25
(for V REF = 5 V, I OUT = 2 A)
0.22
100
Units
Ω
μ F
μ F
Description
2512, 1 W, 1% or better,
carbon film chip resistor
X5R minimum, 50 V or greater
Electrolytic, 50 V or greater
Allegro MicroSystems, LLC
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
7
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相关代理商/技术参数 |
参数描述 |
|---|---|
| A4952 | 制造商:ALLEGRO 制造商全称:Allegro MicroSystems 功能描述:Designed for pulse width modulated (PWM) control of DC motors, the A4952 and A4953 are capable of peak output currents to ?±2 A and operating voltages to 40 V. |
| A4952ELYTR-T | 功能描述:IC PWM MOTOR DVR FULL 10-MSOP 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 |
| A4953 | 制造商:ALLEGRO 制造商全称:Allegro MicroSystems 功能描述:Designed for pulse width modulated (PWM) control of DC motors, the A4952 and A4953 are capable of peak output currents to ?±2 A and operating voltages to 40 V. |
| A495302 | 功能描述:栅栏接线端子 DISCONNECT BLOCK RoHS:否 制造商:TE Connectivity / AMP 产品:Barrier Terminal Blocks 系列: 类型:Dual Barrier, Flat Block without Mounting Ears 节距:9.53 mm 位置/触点数量:2 线规量程:22-12 电流额定值:20 A 电压额定值:300 V 安装风格:Through Hole 安装角:Vertical 端接类型:Screw 触点电镀:Tin |
| A495302CW | 功能描述:栅栏接线端子 MAGNUM A4 SERIES RoHS:否 制造商:TE Connectivity / AMP 产品:Barrier Terminal Blocks 系列: 类型:Dual Barrier, Flat Block without Mounting Ears 节距:9.53 mm 位置/触点数量:2 线规量程:22-12 电流额定值:20 A 电压额定值:300 V 安装风格:Through Hole 安装角:Vertical 端接类型:Screw 触点电镀:Tin |
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