SEA05Advanced CV/CC secondary controller
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 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.
The device, housed in one of the smallest available package, is ideal for space-shrunk applications such as adapters and chargers.
- 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
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Sample & BuyTop
|Part Number||Marketing Status||Package||Packing Type||Operating Temperature (min)||Operating Temperature (max)||Reference Voltage (nom)||Automotive Grade||Order From ST||Unit Price (US$)*|
|Distributor Availability||RoHS Compliance Grade||Download
|SEA05TR||Active||SOT23-6L||Tape And Reel||_||.19|
(*) Suggested Resale Price per unit (USD) for BUDGETARY USE ONLY. For quotes, prices in local currency, please contact your local ST Sales Office or our Distributors
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