SEA05LTR Active

Advanced constant voltage and constant current controller with very efficient LED pilot-lamp driver
Operating Temp Min Celsius-40.0
Operating Temp Max Celsius150.0
Packing TypeTape And Reel
ROHS Compliance GradeEcopack2
Package NameSOT23-6L
Key Features
  • Constant voltage and constant current control
  • Very efficient LED pilot-lamp driver
  • Wide operating VCCrange (3.5 V - 36 V)
  • Low quiescent consumption: 250 μA
  • Voltage reference: 2.5 V
  • Voltage control loop accuracy ± 0.5%
  • Current sense threshold: 50 mV
  • Current control loop accuracy ± 4%
  • Low external component count
  • Open-drain output stage
  • SOT23-6L package

The device is a highly integrated solution for SMPS applications, with an LED pilot-lamp requiring a dual control loop to perform CV (constant voltage) and CC (constant current) regulation.

The IC allows very efficient LED pilot-lamp driving which helps to reduce the standby consumption of the SMPS. It integrates a voltage reference, two op-amps (with OR-ed open-drain outputs), a low-side current sensing circuit and an LED pilot-lamp driver pin implemented with an open-drain mosfet driven by square waveform with 12.5% duty cycle at 1 kHz that allows reducing LED consumption.

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 is ideal for space-critical applications.

In stock:
Range Unit Price Savings
1 - 9$0.840%
10 - 99$0.7017%
100 - 499$0.4546%
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