SEA05L Advanced constant voltage and constant current controller with very efficient LED pilot-lamp driver

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

技术特性

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

应用领域

AC-DC adapter with LED pilot-lamp
Battery chargers with LED pilot-lamp
SMPS with LED pilot-lamp

管脚定义图

SEA05L 订购信息

订购型号	产品状态	美金价格	数量	封装	包装形式	温度范围	材料声明
SEA05LTR	Active		1000	SOT23-6L	Tape And Reel

DATASHEET

描述	版本	大小
SEA05L : DS7102: Advanced constant voltage and constant current controller with very efficient LED pilot-lamp driver	1	261KB

APPLICATION NOTES

描述	版本	大小
AN3971: STEVAL-ISV005V2: solar battery charger for lead acid batteries based on the SPV1020 and SEA05L	1	1575KB

DESIGN NOTES

描述	版本	大小
DN0002: 10W off-line LED driver based on VIPER27	1.0	829KB

PRODUCT PRESENTATIONS

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