LT3909EDD#PBF Step-Up (Boost) LED Drivers by Analog Devices

Status: Production
Series: LT3909
RoHS: Compliant
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The LT3909 is a 2-string × 60mA LED driver with a fixed 2MHz step-up DC/DC converter capable of driving up to 36V of LEDs. Each LED string contains an accurate high-side current source with ±2% current matching. Output voltage adapts to variations in LED VF for optimum efficiency.Maximum LED current can be programmed from 10mA to 60mA per string using a single resistor. LED brightness can be reduced with analog dimming (up to 10:1) or with PWM dimming (up to 40,000:1 at 100Hz, up to 160:1 at 25kHz) (independent of leakage at VOUT). The LED pins can be paralleled for higher LED current.Additional features include: programmable maximum VOUT for open LED protection, a fault flag to indicate open-LED or LED-short-to-GND and an internal regulation loop to safely limit junction temperature. The LT3909 also includes internal compensation, internal soft-start and micropower shutdown. The LT3909 is available in the 12-pin (3mm × 3mm) DFN and 12-pin MSOP packages.

Where to Buy

Prices starting from US$3.02

Distributor Stock
Logo for Analog Devices
Analog Devices
from US$3.02
6,184
in stock
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Logo for Richardson RFPD
Richardson RFPD
from US$3.90
-
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Features

Up to 36V of LEDs, 2-String × 60mA LED Driver
Wide Input Range: 2.9V to 40V
Up to 40,000:1 PWM Dimming (250ns LED On-Time) (Independent of Leakage at VOUT)
±2% LED Current Matching (Typ ±0.3%)
Integrated Schottky Diode
Internal 400mΩ, 40V, 1A Switch
Single Resistor Sets LED Current (10mA to 60mA) for Both High-Side Current Sources
Output Adapts to LED VF for Optimum Efficiency
LED Current Regulated Even for VIN > VOUT
Fault Flag + Protection for Open-LED and LED-Short-to- GND (Other String Remains in Regulation)
Programmable Maximum VOUT (Regulated)
Internal Compensation, Soft-Start and Thermal Regulation
Accurate EN/UVLO Threshold
Fixed 2MHz Switching Frequency

Alternative Descriptions

2-String × 60mA, 2MHz Boost LE | Analog Devices
LED DRIVER IC | Richardson RFPD


LT3909EDD#PBF Semiconductors - ICs by Linear Technology

LED DRIVER BOOST 2MHZ DFN-12

Status: Unknown
Series: -
RoHS: Unknown
Download Datasheet Visit Manufacturer Site View Pricing & Stock

Specifications

Device Topology Boost (Step Up)
Input Voltage Min 2.9V
Input Voltage Max 40V
Output Voltage Max 36V
Output Current Max 50mA
Switching Frequency 2MHz
No. of Outputs 2Outputs
IC Mounting SMD
Driver Case Style DFN
No. of Pins 12Pins
Operating Temperature Min -40°C
Operating Temperature Max 125°C
Product Range -
Automotive Qualification Standard -
RoHS Phthalates Compliant Yes
MSL MSL 1 - Unlimited
SVHC No SVHC (15-Jan-2018)
Output Current 50mA
Output Voltage 36V

Frequently Asked Questions

Where can I find additional details, specifications and documents for a LT3909EDD#PBF?

Additional datasheets, footprints and schematics for LT3909EDD#PBF are listed on our Part Details page. You can also find images and similar parts to LT3909EDD#PBF on this page.

What pricing and inventory information can I view?

Distributor pricing and stock information is available for LT3909EDD#PBF on our Product Comparison page. Access via the 'View Pricing & Stock' button to view LT3909EDD#PBF price breaks, MOQs, lead times, inventory and SKUs from distributors.

What category does LT3909EDD#PBF fall under?

The LT3909EDD#PBF is listed under Step-Up (Boost) LED Drivers.

Can I view similar or alternative parts?

You can view similar parts to LT3909EDD#PBF when available in the Step-Up (Boost) LED Drivers range under the specifications section at the bottom of the details page.

Who can I contact for technical support of the product?

Submit any questions directly to the customer support team of the distributor listing the product. For the LT3909EDD#PBF you can contact the distributor directly for product support, shipping queries etc.

Is the LT3909EDD#PBF RoHS compliant?

Yes. This part has been flagged as RoHS Compliant by Analog Devices.

Which authorised distributors for LT3909EDD#PBF have stock available?

Authorised distributors including Analog Devices and Richardson RFPD have stock available or on a lead time for LT3909EDD#PBF.

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