SEA05 Datasheet | STMicroelectronics

Advanced constant voltage and constant current controller Features - Constant voltage and constant current control - Wide operating VCC range [3.5 - 36] V - Low quiescent consumption: 200 µA - Voltage reference: 2.5 V - Voltage control loop accuracy +/- 0.5% - Current sense threshold: 50 m V - Open-drain output stage - Low external ponent count - SOT23-6L micro package Applications - Battery chargers - AC-DC adapters - LED drivers Description The SEA05 is a highly integrated solution for SMPS applications requiring a dual control loop to perform CV (constant voltage) and CC (constant current) regulation. The device integrates a voltage reference, two opamps (with OR-ed open-drain outputs), and a lowside 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 ponents needed to plete the two control loops are: a resistor divider that senses the output of the power supply and fixes the voltage regulation setpoint 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 setpoint and must be SOT23 - 6L adequately rated in terms of power dissipation; the frequency pensation ponents (R-C networks) for both loops. The device, housed in one of the smallest available package, is ideal for space-shrunk applications such as adapters and chargers. Figure 1. Internal schematic Vcc 2.5 V 1.23...