- 您现在的位置：买卖IC网 > PDF目录1773 > A3988SJP-T (Allegro Microsystems Inc)IC MOTOR DVR PWM FULL BRG 48LQFP PDF资料下载
参数资料
| 型号： | A3988SJP-T |
| 厂商： | Allegro Microsystems Inc |
| 文件页数： | 6/14页 |
| 文件大小： | 0K |
| 描述： | IC MOTOR DVR PWM FULL BRG 48LQFP |
| 标准包装： | 1 |
| 应用： | 直流电机驱动器，步进电机驱动器 |
| 输出数： | 2 或 4 |
| 电流 - 输出： | ±1.2A |
| 电压 - 负载： | 8 V ~ 36 V |
| 电源电压： | 3 V ~ 5.5 V |
| 工作温度： | -20°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 48-LQFP 裸露焊盘 |
| 供应商设备封装： | 48-LQFP 裸露焊盘（7x7） |
| 包装： | 管件 |
A3988
Quad DMOS Full Bridge PWM Motor Driver
Synchronous Rectification When a PWM-off cycle is
triggered by an internal fixed off-time cycle, load current will
recirculate. The A3988 synchronous rectification feature will turn
on the appropriate MOSFETs during the current decay, and effec-
tively short out the body diodes with the low R DS(on) driver. This
significantly lowers power dissipation. When a zero current level
is detected, synchronous rectification is turned off to prevent
reversal of the load current.
V PHASE
+
Mixed Decay Operation The bridges operate in mixed
decay mode. Referring to figure 2, as the trip point is reached, the
device goes into fast decay mode for 30.1% of the fixed off-time
period. After this fast decay portion, t FD , the device switches
to slow decay mode for the remainder of the off-time. During
transitions from fast decay to slow decay, the drivers are forced
off for approximately 600 ns. This feature is added to prevent
shoot-through in the bridge. As shown in figure 2, during this
“dead time” portion, synchronous rectification is not active, and
the device operates in fast decay and slow decay only.
I OUT
0
–
9 μ s
Enlargement A
Fixed Off-Time 30 μ s
21 μ s
See Enlargement A
I Trip
I OUT
FD SR
SD SR
FD DT
SD DT
Figure 2. Mixed Decay Mode Operation
SD DT
Allegro MicroSystems, LLC
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
6
相关PDF资料 |
PDF描述 |
|---|---|
| A3989SEVTR-T | IC STEPPER/MOTOR DRIVER 36-QFN |
| A3992SB-T | IC MOTOR DRVR PWM DUAL 24-DIP |
| A3995SEVTR-T | IC MOTOR DRIVER PWM DUAL 36-QFN |
| A3998SETTR-T | IC MOTOR DRIVER DUAL DMOS QFN |
| A4401KL-T | IC QUASI FLYBACK CONVERTER 8SOIC |
相关代理商/技术参数 |
参数描述 |
|---|---|
| A3988SJPTR-T | 功能描述:IC PWM MOTR DVR FULL BRDG 48LQFP 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 |
| A3989 | 制造商:ALLEGRO 制造商全称:Allegro MicroSystems 功能描述:Bipolar Stepper and High Current DC Motor Driver |
| A3989_V | 制造商:ALLEGRO 制造商全称:Allegro MicroSystems 功能描述:Bipolar Stepper and High Current DC Motor Driver |
| A39899 | 制造商:n/a 功能描述:Power Semiconductor |
| A3989SEV-T | 制造商:Allegro MicroSystems 功能描述:Motor Driver IC |
发布紧急采购，3分钟左右您将得到回复。