Features and Benefits
- True Color PWM™ with 3000:1 Dimming Ratio
- Operates in Boost, Buck Mode or Buck-Boost Mode
- Wide Input Voltage Range:
- Operation from 3V to 30V
- Transient Protection to 40V
- Gate Driver for Optional PWM Dimming with P-channel MOSFET
- Adjustable Frequency: 250kHz to 2MHz
- Constant-Current and Constant-Voltage Regulation
- Low Shutdown Current: <1μA
- RoHS Compliant Package with Gold Pad Finish
- Tiny, Low Profile (9mm × 15mm × 2.82mm) Surface Mount LGA Package
The LTM8042 is a complete μModule® (power module) Boost LED Driver specifically designed to drive LEDs up to 1A, while the LTM8042-1 drives up to 350mA. It combines a boost power topology with a unique current loop to operate as a constant-current source. The PWM input provides as much as 3000:1 LED dimming, while 10:1 analog dimming can be accomplished by a single resistor or analog voltage applied to the CTL pin. As with any boost topology, the LTM8042/LTM8042-1 has an uninterrupted current path between its input and output and is thus intolerant to a short-circuit or overload from the output to ground.
|# WHITE LEDS||LED CURRENT||12VIN||24VIN|
The LTM8042/LTM8042-1 is packaged in a thermally enhanced, compact overmolded land grid array (LGA) package. The LTM8042/LTM8042-1 is Pb-free and a RoHS compliant.
- Display Backlighting
- Automotive and Avionic Lighting
Product Lifecycle Production
At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.
Evaluation Kits (2)
Demonstration circuits 1511A-B features the LTM8042-1, which is a complete 350mA µModule LED driver. The demonstration circuit is configured using the boost topology, accepting an input voltage from 3V to 30V and supporting an output up to 32V. The default switching frequency is 950kHz for the DC1511A-B, but can be adjusted by changing the value of the RT resistor. DC1511A is easily configured to support other features, including PWM dimming and analog dimming; It also supports buck-boost mode and buck mode (step-down) topologies.
Demonstration circuits 1511A-A features the LTM8042, which is a complete 1A µModule LED driver. The demonstration circuit is configured using the boost topology, accepting an input voltage from 3V to 30V and supporting an output up to 32V. The default switching frequency is 600kHz for the DC1511A-A, but can be adjusted by changing the value of the RT resistor. DC1511A is easily configured to support other features, including PWM dimming and analog dimming; It also supports buck-boost mode and buck mode (step-down) topologies.
Tools & Simulations
LTspice® is a powerful, fast and free simulation software, schematic capture and waveform viewer with enhancements and models for improving the simulation of analog circuits.
To launch ready-to-run LTspice demonstration circuits for this part:
Step 1: Download and install LTspice on your computer.
Step 2: Click on the link in the section below to download a demonstration circuit.
Step 3: If LTspice does not automatically open after clicking the link below, you can instead run the simulation by right clicking on the link and selecting “Save Target As.” After saving the file to your computer, start LTspice and open the demonstration circuit by selecting ‘Open’ from the ‘File’ menu.
Models for the following parts are available in LTspice:
Product Selector Card (1)
Press Releases (1)
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Sample & Buy
The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Analog Devices, Inc. sales office or authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.