IPS21I-SO-G-LF-TR

Current & Power Monitors & Regulators Current and Voltage Feedback Controllers

Feedback Controllers With Low Current Sense Voltage

The 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.

Features

Dual precision regulators for SMPS voltage and current control

Output currents up to 50A

Output voltage down to 1.2V

50mV or 100mV current sensing voltage

1.20V voltage reference

Operates with grounded optocoupler

4V shunt regulator for VCC supply

Applications

Fast chargers for power tools and other applications

Battery eliminators

Industrial and bench-type power supplies

Distributed power systems