On Semi公司的AMIS-39101是帶保護的8路大電流輸出高邊驅動器,每個驅動對可提供830mA連續電流,外接一個電容可形成電荷泵,主要用在工業應用如馬達,繼電器和LED陣列等.本文介紹了AMIS-39101主要特性,框圖,典型應用電路以及評估板AMIS−3910XGEVB主要特性,電路圖,材料清單和PCB元件布局圖.
The AMIS-39101 is a robust high side driver featuring eight independent high current output drive channels along with a number of integrated fault protection circuits. This highly integrated product is designed for controlled delivery of power to a large variety of loads in industrial applications including motors, relays and LED arrays, among others. With all driver output channels in the conducting state, each channel can source up to 350 mA of continuous current (resistive load). In cases where all output drivers are not active, higher output current per channel can be achieved provided that the thermal limits of the device are not exceeded.
Furthermore, in order to minimize system cost each output driver has built-in fly-back diodes. The device withstands short circuits to ground and supply, respectively. It is designed with an array of integrated protection features including overtemperature and overcurrent detection and shutdown. The integrated charge pump requires only one external capacitor and provides for operation of the critical fault protection circuitry even in case of low supply voltages. The device can be interfaced to a variety of microcontrollers via the serial interface link, in turn allowing for monitoring and controlling the state of each of the output drivers individually. In this case, at the onset of a potential hazardous situation the drivers are switched off and the diagnostic state of the drivers can be extracted via the serial interface. The device also features a power down mode for reduced power consumption and has high built-in electrostatic discharge (ESD) protection capability for robust operation.
AMIS-39101主要特性:
Eight high side output drivers
Up to 830mA continuous current per driver pair (resistive load)
Charge pump with one external capacitor
Serial interface
Short-circuit protection
Diagnostic features
Power-down mode
Internal thermal shutdown
3.3 V and 5 V microcontroller compliant
Excellent system ESD
Automotive compliant
AMIS-39101應用:
Actuators
LEDs
Solenoids
Smart junction boxes
Power management modules
Automobiles
圖1. AMIS-39101框圖
圖2. AMIS-39101典型應用電路圖
評估板AMIS−3910XGEVB
The AMIS−3910XGEVB evaluation board demonstrates the AMIS−39101 high side driver in SOIC package. The evaluation board includes all external components needed for operating AMIS−39101 and to demonstrate the small PCB surface area such an implementation requires.
評估板AMIS−3910XGEVB主要特性:
Eight High Side Output Drivers
Up to 830 mA Continuous Current per Driver Pair (Resistive Load)
Charge Pump with One External Capacitor
Serial Interface
Short−circuit Protection
Diagnostic Features
Power−down Mode
Internal Thermal Shutdown
3.3 V and 5 V Microcontroller Compliant
Excellent System ESD
Automotive Compliant
Temperature Range of −40℃ to +150℃
Available in 28−pin SOIC
These are Pb−Free Devices
圖3. 評估板AMIS−3910XGEVB外形圖
圖4. 評估板AMIS−3910XGEVB電路圖
評估板AMIS−3910XGEVB材料清單:
圖5. 評估板AMIS−3910XGEVB PCB元件布局圖:頂層
圖6. 評估板AMIS−3910XGEVB PCB元件布局圖:底層
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