STMicroelectronics SEA05
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.| Part No. | SEA05 |
|---|---|
| Datasheet | SEA05 Download |
| Manufacturer |  STMicroelectronics |
| Description | Advanced constant voltage and constant current controller |
| Buy | Stock & Price |
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 mV
● Open-drain output stage
● Low external component count
● SOT23-6L micro package
APPLICATIONS
● Battery chargers● AC-DC adapters
● LED drivers
DESCRIPTION
The external components needed to complete 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 compensation components (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.
