STLD40D

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White Led Power Supply For Large Display Backlight

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  • STLD40D is a boost converter that operates from 3.0 V to 5.5 V. It can provide an output voltage as high as 37 V and can drive up to 10 white LEDs in series. The converter is a PFM (pulse frequency modulation) inductor switch that can work in discontinuous (DCM) mode operation. A minimum OFF time of the embedded boost switch TSWis fixed internally and allows limiting the switching frequency. The output current capability is 20 mA with an output voltage of 37 V. The regulation is done by sensing the LED current through the resistor RLED. The device can be turned ON/OFF through the logic enable signal pin EN. By applying a low frequency PWM signal the LEDs can be dimmed. The maximum peak inductor current can be programmed by connected a resistor RSETto the pin RSET.

    Key Features

    • Inductor switches boost controller
    • PFM mode control
    • High efficiency over wide range of input voltage from 3.0 V to 5.5 V
    • Over voltage protection with automatic restart
    • Adjustable peak current limit
    • Enable pin with possibility of PWM dimming control
    • Low shutdown current < 1 μA
    • Small external component
    • Good load and line regulation
    • QFN8 3 x 3 mm

Circuit Diagram

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Technical Documentation

    • Description Version Size Action
      DS4675
      White LED power supply for large display backlight
      7.1
      339.87 KB
      PDF
      DS4675

      White LED power supply for large display backlight

    • Description Version Size Action
      AN2333
      White LED power supply for large display backlight
      3.3
      358.67 KB
      PDF
      AN2333

      White LED power supply for large display backlight

Quality and Reliability

Part Number Marketing Status Package Grade RoHS Compliance Grade Material Declaration**
STLD40DPUR
Active
VFDFPN 8 3x3x1.0 Industrial Ecopack2

STLD40DPUR

Package:

VFDFPN 8 3x3x1.0

Material Declaration**:

PDF XML

Marketing Status

Active

Package

VFDFPN 8 3x3x1.0

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.

Sample & Buy

Part Number
Order from Distributors
Order from ST
Marketing Status
Package
Packing Type
Temperature (°C) ECCN (US)
Country of Origin
Budgetary Price (US$)*/Qty
min
max
STLD40DPUR Available at 5 distributors

Distributor availability ofSTLD40DPUR

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 1438 1 Order Now
FUTURE WORLDWIDE 3000 3000 Order Now
Newark Element14 AMERICA 300 0 Order Now
MOUSER WORLDWIDE 1254 1 Order Now
Farnell Element14 EUROPE 630 1 Order Now

Distributor reported inventory date: 2020-07-10

Distributor Name

DIGIKEY

Stock

1438

Min.Order

1

Region

WORLDWIDE Order Now

FUTURE

Stock

3000

Min.Order

3000

Region

WORLDWIDE Order Now

Newark Element14

Stock

300

Min.Order

0

Region

AMERICA Order Now

MOUSER

Stock

1254

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

630

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2020-07-10

Buy now
Active
VFDFPN 8 3x3x1.0 Tape And Reel -40 85 EAR99 MALAYSIA 0.63 / 1k

STLD40DPUR

Marketing Status

Active

Unit Price (US$)

0.63

Budgetary Price (US$)*/Qty

0.63 / 1k

Distributor availability ofSTLD40DPUR

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 1438 1 Order Now
FUTURE WORLDWIDE 3000 3000 Order Now
Newark Element14 AMERICA 300 0 Order Now
MOUSER WORLDWIDE 1254 1 Order Now
Farnell Element14 EUROPE 630 1 Order Now

Distributor reported inventory date: 2020-07-10

Distributor Name

DIGIKEY

Stock

1438

Min.Order

1

Region

WORLDWIDE Order Now

FUTURE

Stock

3000

Min.Order

3000

Region

WORLDWIDE Order Now

Newark Element14

Stock

300

Min.Order

0

Region

AMERICA Order Now

MOUSER

Stock

1254

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

630

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2020-07-10

Package

VFDFPN 8 3x3x1.0

Packing Type

Tape And Reel

Operating Temperature (°C)

(min)

-40

(max)

85

ECCN (US)

EAR99

Country of Origin

MALAYSIA

(*) 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