ST IPS4260L四路低边智能电源开关解决方案

ST公司的IPS4260L是单片高速(FSW = 100 kHz)器件,能驱动四路独立的容性,电阻或电感负载,工作电压8V-50V,具有单独的保护,VCC欠压锁住,高速工作(tr, tf< 1 μs),可由外接电阻编程负载电流限流水平,典型负载电流:0.5A(每路)/2A(一路),设计满足IEC 61131-2要求,主要用在可编程逻辑控制(PLC),工业PC外设输入/输出,数字控制机和通用低边开关应用.本文介绍了IPS4260L主要特性,框图和应用电路,以及评估板STEVAL-IFP029V1主要特性,电路图,材料清单和PCB设计图.
The IPS4260L is a monolithic high speed (FSW = 100 kHz) device, which can drive four independent capacitive, resistive or inductive loads with one side connected to supply voltage.
Four integrated inductive catch diodes clamp the turn-off transients generated by inductive loads combined with proper external TVS allowing fast decay even with huge inductance. Each channel is protected by the overload protection limiting the output current in case of overload. The IC allows the overload current limitation level (ICOLIM) to be set by an external resistor on ILIM pin.
Built-in thermal shutdown protects the chip against overtemperature even in case of short-circuit. If enabled, the integrated cut-off protection features a non-dissipative protection in case of overload; it limits both the output average current value and, consequently, the device overheating. Cut-off delay/restart can be programmed by external resistors on CoD pin; it can be disabled by shorting CoD to GND.
Two common diagnostic open drains pins (OL, for open load and FLT for overload and thermal shutdown) together with the four open drain on each INx pin (overload and thermal shutdown) feature an extensive diagnostic of the chip.
IPS4260L主要特性:
 8 V to 50 V operating voltage range
 Four independent protected channels
 VCC undervoltage lock-out
 High speed operation (tr, tf< 1 μs)
 Programmable load current limitation level by external resistor
 Typical operating load current: 0.5...