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

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  • 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.

    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

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Part Number
Package
Packing Type
Temperature (°C) Reference Voltage (V) (nom)
Marketing Status
Budgetary Price (US$)*
Quantity
More info
Order from Distributors
Order from ST
min
max
SEA05LTR SOT23-6L Tape And Reel -40 150 2.5
Active
0.2664 1000
MORE INFO

ECCN (US):

EAR99

Country of Origin:

-

Check Availability

Distributor availability ofSEA05LTR

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 1407 1 Order Now
ARROW AMERICA 17 1 Order Now
MOUSER WORLDWIDE 1540 1 Order Now
RUTRONIK EUROPE 3000 3000 Order Now

Distributor reported inventory date: 2019-09-20

Distributor Name

DIGIKEY

Stock

1407

Min.Order

1

Region

WORLDWIDE Order Now

ARROW

Stock

17

Min.Order

1

Region

AMERICA Order Now

MOUSER

Stock

1540

Min.Order

1

Region

WORLDWIDE Order Now

RUTRONIK

Stock

3000

Min.Order

3000

Region

EUROPE Order Now

Distributor reported inventory date: 2019-09-20

Get sample

SEA05LTR

Package

SOT23-6L

Packing Type

Tape And Reel

Unit Price (US$)

0.2664*

Distributor availability ofSEA05LTR

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 1407 1 Order Now
ARROW AMERICA 17 1 Order Now
MOUSER WORLDWIDE 1540 1 Order Now
RUTRONIK EUROPE 3000 3000 Order Now

Distributor reported inventory date: 2019-09-20

Distributor Name

DIGIKEY

Stock

1407

Min.Order

1

Region

WORLDWIDE Order Now

ARROW

Stock

17

Min.Order

1

Region

AMERICA Order Now

MOUSER

Stock

1540

Min.Order

1

Region

WORLDWIDE Order Now

RUTRONIK

Stock

3000

Min.Order

3000

Region

EUROPE Order Now

Distributor reported inventory date: 2019-09-20

Operating Temperature (°C)

(min)

-40

(max)

150

Reference Voltage (V) (nom)

2.5

Marketing Status

Active

Unit Price (US$)

0.2664

Quantity

1000

ECCN (US)

EAR99

Country of Origin

-

(*) 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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Publications and Collaterals

    • Description Version Size Action
      Power Management Guide 06.2019
      5.5 MB
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Part Number Marketing Status Package Grade RoHS Compliance Grade Material Declaration**
SEA05LTR
Active
SOT23-6L Industrial Ecopack2

SEA05LTR

Package:

SOT23-6L

Material Declaration**:

Marketing Status

Active

Package

SOT23-6L

Grade

Industrial

RoHS Compliance Grade

Ecopack2

(**) The Material Declaration forms available on st.com may be generic documents based on the most commonly used package within a package family. For this reason, they may not be 100% accurate for a specific device. Please contact our sales support for information on specific devices.