SN71052

SN71052 Constant voltage and constant current controller for battery chargers and adapters Semiconductor http:// www.auk.co.kr Description The SN71052 is a highly integrated solution for SMPS applications requiring a dual control loop to perform CV (constant voltage) and CC (constant current) regulation. The SN71052 integrates a voltage reference, Two Op-Amps (with OR-ed open-drain outputs), and a low-side current sensing circuit. The voltage reference, along with one Op-Amp, is the core of the voltage control loop; the current sensing circuit and the other Op-Amp make up the current control loop. The external components needed to complete the two control loops are: ■ A resistor divider that senses the output of the power supply SOT-26 (adapter, battery charger) and fixes the voltage regulation set point at the specified value; ■ A sense resistor that feeds the current sensing circuit with a voltage proportional to the dc output current; this resistor determines the current regulation set point and must be adequately rated in terms of power dissipation; ■ Frequency compensation components (R-C networks) for both loops. ORDERING INFORMATION Product SN71052 Marking 702 Package SOT-26 Application ◈ Battery chargers ◈ AC to DC adapters Block Diagram ▲ Marking Detail Information 702(①)□(②) ① Device Code ② Week Code KSD-I5P012-000 Dec, 2011 REV. 00 1 Free Datasheet http://www.datasheet4u.com/ SN71052 ◈ Pin connection 1 : Vctrl 2 : GND 3 : OUT 4 : Ictrl 5 : Vsense 6: V...