- 您现在的位置：买卖IC网 > PDF目录359133 > MC33887 (飞思卡尔半导体(中国)有限公司) 5.0 A H-Bridge with Load Current Feedback(带本地电流反馈功能的5.0A H桥接器) PDF资料下载
参数资料
| 型号： | MC33887 |
| 厂商： | 飞思卡尔半导体(中国)有限公司 |
| 英文描述： | 5.0 A H-Bridge with Load Current Feedback(带本地电流反馈功能的5.0A H桥接器) |
| 中文描述： | 5.0的H -桥的负载电流反馈（带本地电流反馈功能的5.0AH桥接器） |
| 文件页数： | 18/28页 |
| 文件大小： | 760K |
| 代理商： | MC33887 |
第1页第2页第3页第4页第5页第6页第7页第8页第9页第10页第11页第12页第13页第14页第15页第16页第17页当前第18页第19页第20页第21页第22页第23页第24页第25页第26页第27页第28页
33887
18
Go to: www.freescale.com
SYSTEM/APPLICATION INFORMATION
INTRODUCTION
Numerous protection and operational features (speed,
torque, direction, dynamic braking, PWM control, and closed-
loop control), in addition to the 5.0 A current capability, make
the 33887 a very attractive, cost-effective solution for
controlling a broad range of small DC motors. In addition, a pair
of 33887 devices can be used to control bipolar stepper motors.
The 33887 can also be used to excite transformer primary
windings with a switched square wave to produce secondary
winding AC currents.
As shown in
Figure 1
, Simplified Internal Block Diagram,
page 2, the 33887 is a fully protected monolithic H-Bridge with
Enable, Fault Status reporting, and High-Side current sense
feedback to accommodate closed-loop PWM control. For a DC
motor to run, the input conditions need be as follows: Enable
input logic HIGH, D1 input logic LOW,
D2
input logic HIGH,
FS
flag cleared (logic HIGH), one IN logic LOW and the other IN
logic HIGH (to define output polarity). The 33887 can execute
dynamic braking by simultaneously turning on either both high-
side
MOSFETs or both low-side MOSFETs in the output
H-Bridge; e.g., IN1 and IN2 logic HIGH or IN1 and IN2 logic
LOW.
The 33887 outputs are capable of providing a continuous DC
load current of 5.0 A from a 40 V V+ source. An internal charge
pump supports PWM frequencies to 10 kHz. An external pull-up
resistor is required at the
FS
terminal for fault status reporting.
The 33887 has an analog feedback (current mirror) output
terminal (the FB terminal) that provides a constant-current
source ratioed to the active high-side MOSFET. This can be
used to provide “real time” monitoring of load current to facilitate
closed-loop operation for motor speed/torque control.
Two independent inputs (IN1 and IN2) provide control of the
two totem-pole half-bridge outputs. Two disable inputs (D1 and
D2
) provide the means to force the H-Bridge outputs to a high-
impedance state (all H-Bridge switches OFF). An EN terminal
controls an enable function that allows the 33887 to be placed
in a power-conserving sleep mode.
The 33887 has undervoltage shutdown with automatic
recovery, active current limiting, output short-circuit latch-OFF,
and overtemperature latch-OFF. An undervoltage shutdown,
output short-circuit latch-OFF, or overtemperature latch-OFF
fault condition will cause the outputs to turn OFF (i.e., become
high impedance or tri-stated) and the fault output flag to be set
LOW. Either of the Disable inputs or V+ must be “toggled” to
clear the fault flag.
Active current limiting is accomplished by a constant OFF-
time PWM method employing active current limiting threshold
triggering. The active current limiting scheme is unique in that it
incorporates a junction temperature-dependent current limit
threshold. This means the active current limiting threshold is
“ramped down” as the junction temperature increases above
160
°
C, until at 175
°
C the current will have been decreased to
about 4.0 A. Above 175
°
C,
the overtemperature shutdown
(latch-OFF) occurs. This combination of features allows the
device to remain in operation for 30 seconds at junction
temperatures above 150
°
C for nonrepetitive unexpected loads.
F
Freescale Semiconductor, Inc.
For More Information On This Product,
n
.
相关PDF资料 |
PDF描述 |
|---|---|
| MC33888FB | Quad High Side and Octal Low Side Switch for Automotive Applications(4高端开关及8低端开关，用于自动应用) |
| MC33889 | System Basis Chip (SBC) with Low Speed Fault Tolerant CAN Interface |
| MC33897 | Single-Wire CAN Transceiver(单线CAN收发器) |
| MC33972 | Multiple Switch Detection Interface with Suppressed Wake-Up(带抑制唤醒功能的多开关检测接口) |
| MC33976 | Dual Gauge Driver with Configurable Response Time(带可设置响应时间的双标尺驱动器) |
相关代理商/技术参数 |
参数描述 |
|---|---|
| MC33887APVW | 功能描述:马达/运动/点火控制器和驱动器 H-BRIDGE W/LD CURNT FDBK RoHS:否 制造商:STMicroelectronics 产品:Stepper Motor Controllers / Drivers 类型:2 Phase Stepper Motor Driver 工作电源电压:8 V to 45 V 电源电流:0.5 mA 工作温度:- 25 C to + 125 C 安装风格:SMD/SMT 封装 / 箱体:HTSSOP-28 封装:Tube |
| MC33887APVW-PB | 制造商:Freescale Semiconductor 功能描述: |
| MC33887APVWR2 | 功能描述:马达/运动/点火控制器和驱动器 H-BRIDGE W/LD CURNT FDBK RoHS:否 制造商:STMicroelectronics 产品:Stepper Motor Controllers / Drivers 类型:2 Phase Stepper Motor Driver 工作电源电压:8 V to 45 V 电源电流:0.5 mA 工作温度:- 25 C to + 125 C 安装风格:SMD/SMT 封装 / 箱体:HTSSOP-28 封装:Tube |
| MC33887AVW | 功能描述:开关 IC - 各种 H-BRIDGE W/LD CURNT FDBK RoHS:否 制造商:Fairchild Semiconductor 开启电阻（最大值）: 电源电压-最大:4.4 V 电源电压-最小:2.5 V 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装 / 箱体:WLCSP-9 封装:Reel |
| MC33887AVWR2 | 功能描述:马达/运动/点火控制器和驱动器 H-BRIDGE W/LD CURNT FDBK RoHS:否 制造商:STMicroelectronics 产品:Stepper Motor Controllers / Drivers 类型:2 Phase Stepper Motor Driver 工作电源电压:8 V to 45 V 电源电流:0.5 mA 工作温度:- 25 C to + 125 C 安装风格:SMD/SMT 封装 / 箱体:HTSSOP-28 封装:Tube |
发布紧急采购，3分钟左右您将得到回复。