LT3954IUHE#PBF Multitopology LED Driver by Analog Devices

Status: Production
Series: LT3954
RoHS: Compliant
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The LT3954 is a DC/DC converter designed to operate as a constant-current source and constant-voltage regulator. It features an internal low side N-channel MOSFET rated for 40V/5A. The LT3954 is ideally suited for driving high current LEDs, but also has features to make it suitable for charging batteries and supercapacitors. The fixed frequency, current mode architecture results in stable operation over a wide range of supply and output voltages. A voltage feedback pin serves as the input for several LED protection features, and also makes it possible for the converter to operate as a constant-voltage source. A frequency adjust pin allows the user to program the frequency from 100kHz to 1MHz to optimize efficiency, performance or external component size.The LT3954 senses output current at the high side or at the low side of the load. The internal PWM generator can be configured to self-oscillate at fixed frequency with duty ratio programmable from 4% to 96%. When driven by an external signal, the PWM input provides LED dimming ratios of up to 3000:1. The CTRL input provides additional analog dimming capability.

Where to Buy

Prices starting from US$4.73

Distributor Stock
Logo for Analog Devices
Analog Devices
from US$4.73
1,168
in stock
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Logo for Richardson RFPD
Richardson RFPD
from US$6.11
-
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Features

3000:1 True Color PWM™ Dimming for LEDs
Wide VIN Range: 4.5V to 40V
Rail-to-Rail Current Sense Range: 0V to 40V
Internal 40V/5A Switch
Programmable PWM Dimming Signal Generator
Constant Current (±3%) and Constant-Voltage (±2%) Regulation
Accurate Analog Dimming
Drives LEDs in Boost, SEPIC, CUK, Buck Mode, Buck-Boost Mode, or Flyback Configuration
Output Short-Circuit Protected Boost
Open LED Protection and Reporting
Adjustable Switching Frequency: 100kHz to 1MHz
Programmable VIN UVLO with Hysteresis
C/10 Indication for Battery Chargers
Low Shutdown Current: <1μA
Thermally Enhanced 5mm × 6mm QFN Package

Alternative Descriptions

40Vin LED Conv w/ Int PWM Gen | Analog Devices
LED DRIVER IC | Richardson RFPD


LT3954IUHE#PBF Semiconductors - ICs by Linear Technology

IC LED CONVERTER 40V 5A QFN-36

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

Specifications

Device Topology Boost Buck Buck-Boost Flyback SEPIC
Input Voltage Min 4.5V
Input Voltage Max 40V
Output Voltage Max -
Output Current Max 5A
Switching Frequency 1MHz
No. of Outputs 1Outputs
IC Mounting SMD
Driver Case Style QFN
No. of Pins 36Pins
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)
Dimming Control Type Analogue PWM

Frequently Asked Questions

Where can I find additional details, specifications and documents for a LT3954IUHE#PBF?

Additional datasheets, footprints and schematics for LT3954IUHE#PBF are listed on our Part Details page. You can also find images and similar parts to LT3954IUHE#PBF on this page.

What pricing and inventory information can I view?

Distributor pricing and stock information is available for LT3954IUHE#PBF on our Product Comparison page. Access via the 'View Pricing & Stock' button to view LT3954IUHE#PBF price breaks, MOQs, lead times, inventory and SKUs from distributors.

What category does LT3954IUHE#PBF fall under?

The LT3954IUHE#PBF is listed under Multitopology LED Driver.

Can I view similar or alternative parts?

You can view similar parts to LT3954IUHE#PBF when available in the Multitopology LED Driver range under the specifications section at the bottom of the details page.

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Submit any questions directly to the customer support team of the distributor listing the product. For the LT3954IUHE#PBF you can contact the distributor directly for product support, shipping queries etc.

Is the LT3954IUHE#PBF RoHS compliant?

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

Which authorised distributors for LT3954IUHE#PBF have stock available?

Authorised distributors including Analog Devices and Richardson RFPD have stock available or on a lead time for LT3954IUHE#PBF.

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