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| 型号： | MC33981BPNAR2 |
| 厂商： | Freescale Semiconductor |
| 文件页数： | 29/40页 |
| 文件大小： | 0K |
| 描述： | IC SWITCH HI SIDE SINGLE 16-PQFN |
| 标准包装： | 1,200 |
| 类型： | 高端 |
| 输入类型： | PWM |
| 输出数： | 1 |
| 导通状态电阻： | 4 毫欧 |
| 电源电压： | 6 V ~ 27 V |
| 工作温度： | -40°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 16-PowerDFN |
| 供应商设备封装： | 16-PQFN（12x12） |
| 包装： | 带卷 (TR) |
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TYPICAL APPLICATIONS
POWER DISSIPATION
1.5 m Length
of Cable
CISPR
LISN and
Inductive Load
Anechoic
Chamber
Class 3
Limits
33981
Emission
EUT
Figure 32. Radiated Emission Spectrum for 33981
1 m Vertical
Monopole
Antenna
Figure 31. Radiated Emission Test Set-up
The results of these measurements are represented in
Class 3 limits of the CISPR25 standard for radiated emission.
CONCLUSION
This document explains how to measure conducted and
radiated emission in accordance with the automotive
CISPR25 standard. Measurements were performed on the
33981 in real application conditions, when driving an
inductive load. An optimized filtering solution was put in place
to have the tested system in accordance with the Class 3
limits. The same method can be used with other PC boards.
POWER DISSIPATION
INTRODUCTION
This section relates to the power dissipation capability for
33981, high frequency high-current high side switch. This
device is a self-protected silicon switch used to replace
electromechanical relays, fuses, and discrete circuits in
power management applications.
This section presents the key features of the device and its
targeted applications. The theoretical calculations for power
dissipation and die junction temperatures are determined in
this document for inductive loads. A concrete example with
DEVICE FEATURES
This 33981 is a 4.0 m ? self-protected, high side switch
digitally controlled from a microcontroller (MCU) with
extended diagnostics, able to drive DC motors up to 60 kHz.
A bootstrap architecture has been used to provide fast
transient gate voltage in order to reach 4.0 m ? R DS(ON)
maximum at room temperature. In parallel, a charge pump is
implemented to offer continuous on-state capability. This
dual current supply of the high side MOSFET allows a duty
cycle from 5% to 100%. An external capacitor connected
between pins SR and GND is used to control the slew rate at
the output and, therefore, reduce electromagnetic
perturbations.
In standard configuration, the motor current recirculation is
handled by an external freewheeling diode. To reduce global
power dissipation, the freewheeling diode can be replaced by
an external discrete MOSFET in low side configuration. The
IC integrates a gate driver that controls and protects this
external MOSFET in the event of short-circuit to battery. The
product manages the cross conduction between the internal
high side and the external low side when used in a half-bridge
configuration. The two MOSFETs can be controlled
independently when the CONF pin is at 0 V. To eliminates
fuses, the device is self-protected from severe short-circuits
(100 A typical) with an innovative over-current strategy.
The 33981 has a current feedback for real-time monitoring
of the load current through an MCU analog/digital converter
to facilitate closed-loop operation for motor speed control.
The 33981 has an analog thermal feedback that can be
used by the MCU to monitor PC board temperature to
optimize the motor control and to protect the entire electronic
system. Therefore, an over-temperature shutdown feature
protects the IC against high overload condition.
Figure 33 illustrates the typical application diagram.
Figure 33. Typical Application Diagram
33981
Analog Integrated Circuit Device Data ?
Freescale Semiconductor
29
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MC33982BPNA | 功能描述:电源开关 IC - 配电 SPSS RoHS:否 制造商:Exar 输出端数量:1 开启电阻（最大值）:85 mOhms 开启时间（最大值）:400 us 关闭时间（最大值）:20 us 工作电源电压:3.2 V to 6.5 V 电源电流（最大值）: 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:SOT-23-5 |
| MC33982BPNAR2 | 功能描述:电源开关 IC - 配电 SPSS RoHS:否 制造商:Exar 输出端数量:1 开启电阻（最大值）:85 mOhms 开启时间（最大值）:400 us 关闭时间（最大值）:20 us 工作电源电压:3.2 V to 6.5 V 电源电流（最大值）: 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:SOT-23-5 |
| MC33982CHFK | 功能描述:电源开关 IC - 配电 SNGL 2MOHMS RoHS:否 制造商:Exar 输出端数量:1 开启电阻（最大值）:85 mOhms 开启时间（最大值）:400 us 关闭时间（最大值）:20 us 工作电源电压:3.2 V to 6.5 V 电源电流（最大值）: 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:SOT-23-5 |
| MC33982CHFKR2 | 功能描述:电源开关 IC - 配电 SNGL 2MOHMS RoHS:否 制造商:Exar 输出端数量:1 开启电阻（最大值）:85 mOhms 开启时间（最大值）:400 us 关闭时间（最大值）:20 us 工作电源电压:3.2 V to 6.5 V 电源电流（最大值）: 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:SOT-23-5 |
| MC33982CPNA | 制造商:Freescale Semiconductor 功能描述: |
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