Part # TSM1052 datasheet

Part Manufacturer: ST Microelectronics

ST Microelectronics

Part Description: Constant voltage and constant current controller for battery chargers and adapters


Part Details:

TSM1052 Constant voltage and constant current controller for battery chargers and adapters Features Secondary-side constant voltage and constant current control Very low voltage operation Very low quiescent consumption High-accuracy internal reference Low external component count Wired-or open-drain output stage SOT23-6 Easy frequency compensation SOT23-6 micro package Applications Battery chargers The external components needed to complete the two control loops are: AC DC adapters A resistor divider that senses the output of the Description power supply (adapter, battery charger) and fixes the voltage regulation set point at the The TSM1052 is a highly integrated solution for specified value; SMPS applications requiring a dual control loop to A sense resistor that feeds the current sensing perform CV (constant voltage) and CC (constant circuit with a voltage proportional to the dc current) regulation. output current; this resistor determines the current regulation set point and must be The TSM1052 integrates a voltage reference, two adequately rated in terms of power dissipation; op amps (with OR-ed open-drain outputs), and a low-side current sensing circuit. Frequency compensation components (RC networks) for both loops. The voltage reference, along with one op amp, is the core of the voltage control loop; the current The TSM1052, housed in one of the smallest sensing circuit and the other op amp make up the package available, is ideal for space-shrunk current control loop. applications such as adapters and chargers. Table 1. Device summary Part number Package Packaging TSM1052 SOT23-6 Tape and reel February 2008 Rev 2 1/15 www.st.com 15 Contents


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TSM1052.pdf Datasheet