STMicroelectronics SEA05L
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.| Part No. | SEA05L |
|---|---|
| Datasheet | SEA05L Download |
| Manufacturer |  STMicroelectronics |
| Description | Advanced constant voltage and constant current controller |
| Buy | Stock & Price |
FEATURES
● Constant voltage and constant current control● Very efficient LED pilot-lamp driver
● Wide operating VCC range (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
APPLICATIONS
● AC-DC adapter with LED pilot-lamp● Battery chargers with LED pilot-lamp
● SMPS with LED pilot-lamp
DESCRIPTION
It integrates a voltage reference, two op-amps (with OR-ed open-drain outputs), a lowside 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. SOT23-6L (plastic package) Figure 1. Block diagram 1.23 V 2.5 V + - V CC 6 50mV + - 5 3 4 2 GND 1 OSC Isense Out Vctrl LD The voltage reference, along with one op-amp, is the core of the voltage control loop.
