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| 型号： | MCZ33887EK |
| 厂商： | Freescale Semiconductor |
| 文件页数： | 23/37页 |
| 文件大小： | 0K |
| 描述： | IC H-BRIDGE 5V CURR FDBK 54-SOIC |
| 标准包装： | 26 |
| 类型： | 半桥 |
| 输入类型： | 非反相 |
| 输出数： | 2 |
| 导通状态电阻： | 120 毫欧 |
| 电流 - 输出 / 通道： | 5A |
| 电流 - 峰值输出： | 6.5A |
| 电源电压： | 5 V ~ 28 V |
| 工作温度： | -40°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 54-SSOP（0.295"，7.50mm 宽）裸露焊盘 |
| 供应商设备封装： | 54-SOICW-EP |
| 包装： | 管件 |
| 产品目录页面： | 808 (CN2011-ZH PDF) |
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FUNCTIONAL DEVICE OPERATION
OPERATIONAL MODES
FUNCTIONAL DEVICE OPERATION
OPERATIONAL MODES
The 33887 Simplified Internal Block Diagram shown in
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 28 V V+ source. An internal
charge pump supports PWM frequencies to 10 kHz. An
external pull-up resistor is required at the FS pin for fault
status reporting. The 33887 has an analog feedback (current
mirror) output pin (the FB pin) 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 pin 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.
33887
Analog Integrated Circuit Device Data
Freescale Semiconductor
23
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MCZ33887EKR2 | 功能描述:马达/运动/点火控制器和驱动器 H-BRIDGE W/LD CUR 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 |
| MCZ33887EKR2DH | 制造商:FREESCALE 制造商全称:Freescale Semiconductor, Inc 功能描述:5.0 A H-Bridge with Load Current Feedback |
| MCZ33889BEG | 功能描述:网络控制器与处理器 IC SBC-LITE-LS-CAN RoHS:否 制造商:Micrel 产品:Controller Area Network (CAN) 收发器数量: 数据速率: 电源电流（最大值）:595 mA 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:PBGA-400 封装:Tray |
| MCZ33889BEG | 制造商:Freescale Semiconductor 功能描述:IC SYSTEM BASIS W/CAN TRANCEIVER |
| MCZ33889BEG/R2 | 制造商:FREESCALE 制造商全称:Freescale Semiconductor, Inc 功能描述:System Basis Chip with Low Speed Fault Tolerant CAN Interface |
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