TJ1052

CONSTANT VOLTAGE & CONSTANT CURRENT CONTROLLER FEATURES z z z z z z z Constant Voltage and Constant Current Control Low Voltage Operation Precision Internal Component Count Current Sink Output Stage Easy Compensation Low AC Mains Voltage Rejection Moisture Sensitivity Level 3 TJ1052 SOT-23 6L APPLICATION z Battery Chargers z Adapters ORDERING INFORMATION Device TJ1052SF6 TJ1052GSF6 Package SOT-23 6L DESCRIPTION TJ1052 is a highly integrated solution for SMPS applications requiring constant voltage and constant current mode. TJ1052 integrates one voltage reference, two operational amplifiers (with one output - common collectors), and a current sensing circuit. The voltage reference combined with one operational amplifier makes it an ideal voltage controller, and the other low voltage reference combined with the other operational amplifier makes it an ideal current limiter for output low side current sensing. The current threshold is fixed and precise. The only external components are : z A resistor bridge to be connected to the output of the power supply (adaptor, battery charger) to set the voltage regulation by dividing the desired output voltage to match the internal voltage reference value. z A sense resistor having a value and allowable dissipation power which need to be chosen according to the internal voltage threshold. TJ1052 is ideal for space shrunk applications such as adapters and battery chargers. Absolute Maximum Ratings (TA = 25℃, unless otherwise specified...