SEA05TR

STMICROELECTRONICS  SEA05TR  芯片, 恒压/恒流控制器, SOT-23-6

The is a highly Integrated Controller 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 op-amps with ORed 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 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 adequately rated in terms of power dissipation, the frequency compensation components R-C networks for both loops.

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200µA Low quiescent consumption

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±0.5% Voltage control loop accuracy

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50mV Current sense threshold