IPS20C-D-G-LF中文资料Legacy Power Management数据手册Microchip规格书

描述 Description

Feedback Controllers With Low Current Sense VoltageThe IPS20 and IPS21 are low-voltage current sensing feedback controllers used in switch mode power supplies to control load-side current and voltage. They have been designed to limit the power dissipated in the sensing circuitry for high output current applications that require current limiting. They both incorporate a 4V shunt regulator for maximum flexibility to power the chip.The IPS20 and IPS21 only differ by the characteristics of the current sensing references.The IPS20 incorporates a trimmed 50mV reference with a positive temperature coefficient which closely matches that of a PCB copper trace. This copper trace sensing method can be used inexpensively with very low associated power losses. The IPS21 incorporates a temperature compensated 100mV reference for more conventional resistors. Both controllers feature the same voltage regulator section with a trimmed temperature stable voltage reference of 1.19V.FeaturesDual precision regulators for SMPS voltage and current controlOutput currents up to 50AOutput voltage down to 1.2V50mV or 100mV current sensing voltage1.20V voltage referenceOperates with grounded optocoupler4V shunt regulator for VCC supplyApplicationsFast chargers for power tools and other applicationsBattery eliminatorsIndustrial and bench-type power suppliesDistributed power systems