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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
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Product Specifications (1)
| Resource title | Latest update | |||
|---|---|---|---|---|
| 19 Sep 2016 |
19 Sep 2016
|
Application Notes (1)
| Resource title | Latest update | |||
|---|---|---|---|---|
| 13 Sep 2018 |
13 Sep 2018
|
EDA Symbols, Footprints and 3D Models
STMicroelectronics - STLD40D
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Quality and Reliability
| Part Number | Marketing Status | Package | Grade | RoHS Compliance Grade | Material Declaration** |
|---|---|---|---|---|---|
| STLD40DPUR |
Active
|
VFDFPN 8 3x3x1.0 | Industrial | 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 | ECCN (US) | ECCN (EU) | Packing Type | Package | Temperature (°C) | Country of Origin | Budgetary Price (US$)*/Qty | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| min | max | |||||||||||
| STLD40DPUR | 7 distributors | Buy Direct |
Active
|
EAR99 | NEC | Tape And Reel | VFDFPN 8 3x3x1.0 | -40 | 85 | MALAYSIA | 0.63 / 1k | |
(*) 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
