LINEAR Manuals
LINEAR Triple LED Driver in 4mm × 5mm QFN Supports LCD Backlights in Buck Boost or Buck-Boost Modes Delivers 3000:1 PWM Dimming Ratio Design Note 449 Hua (Walker) Bai
This document introduces the LT®3496 triple LED driver, which can achieve a PWM dimming ratio of up to 3000:1, supports multiple working modes, and is packaged in a 4mm × 5mm QFN package, which is highly efficient, compact, and cost-effective.
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LINEAR 12-bit DAC in TSOT-23 Includes Bidirectional REF Pin for Connection to Op Amp or External High Precision Reference Design Note 448 Kevin Wrenner Troy Seman Mark Thoren
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LINEAR Supercapacitors Can Replace a Backup Battery for Power Ride-Through Applications Design Note 450 Jim Drew
Supercapacitors (or ultracapacitors) are increasingly being used in applications that require short-term energy storage and intermittent high-energy pulses. This document introduces a power ride-through circuit application where a backup energy source switches in and powers the load during a short power supply failure. This application has traditionally been dominated by batteries, but electric double layer capacitors (EDLCs) are gaining traction due to their decreasing price-per-farad, size, and effective series resistance per capacitance (ESR/C).
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LINEAR Current Sense Amp Inputs Work from 0.3V to 44V Independent of Supply Design Note 451 handbook
The LT6105 is a current sense amplifier whose inputs can operate over a range of -0.3V to 44V independent of the supply voltage.
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LINEAR 4-Phase Boost Converter Delivers 384W with no Heat Sink Design Note 453 handbook
This design note introduces a 4-phase boost converter that delivers 384W of power without a heat sink. The converter uses the LTC3862 controller and employs multiphase operation to improve efficiency and reduce ripple voltage and currents in both the input and output capacitors.
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LINEAR Power Monitor for Automotive Telecom Applications Includes ADC I 2C Interface Design Note 452 handbook
This Design Note introduces the LTC4151 power monitor, which can monitor voltages from 12V to 80V and output data through the I2C interface.
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LINEAR Programmable Baseband Filter for Software-De ned UHF RFID Readers Design Note 432 Philip Karantzalis
This design note introduces a programmable baseband filter for software-defined UHF RFID readers. The filter uses a high-linearity direct conversion receiver to achieve reliable multitag detection and high data throughput. The filter's bandwidth can be programmed from 15 kHz to 150 kHz to meet the needs of various applications.
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LINEAR Low Pro le Synchronous 2-Phase Boost Converter Produces 200W with 98% Ef ciency Design Note 455 by Victor Khasiev
This document describes a low-profile synchronous, 2-phase boost converter that produces 200W power with 98% efficiency. The converter is suitable for automotive audio amplifiers, offering high efficiency and compactness.
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LINEAR Single-Ended to Differential Ampli er Design Tips Design Note 454 Philip Karantzalis Tim Regan
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LINEAR Digitize a $1000 Sensor with a $1 Analog-to-Digital Converter Design Note 456 Mark Thoren
This document introduces a method of combining high-precision sensors with low-cost ADCs that can use a $1000 sensor with a $1 ADC. This method uses the LTC2450 16-bit single-ended input, delta-sigma ADC, which has 2LSB INL, 2LSB offset, and 0.01% gain error, making it a perfect match for many high-end industrial sensors as well as a wide variety of data acquisition, measurement, control, and general purpose voltage monitoring applications.
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LINEAR Buck Converter Eases the Task of Designing Auxiliary Low Voltage Negative Rails Design Note 458 handbook
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LINEAR Monolithic Synchronous Step-Down Regulator Delivers up to 12A from a Wide Input Voltage Range Design Note 457 handbook
The LTC3608 is a monolithic synchronous step-down regulator that delivers up to 12A from a wide input voltage range of 4.5V to 20V. It operates at a nominal 650kHz switching frequency, which enables the use of low-profile inductors and capacitors while maintaining high efficiency.
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LINEAR Triple Buck Regulator Features 1-Wire Dynamically Programmable Output Voltages Design Note 459 Andy Bishop
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LINEAR 100V Controller Drives High Power LED Strings from Just about Any Input Design Note 461 by Keith Szolusha
This article introduces a 100V controller that drives high power LED strings from just about any input. The controller features a 125W, 83V at 1.5A, 97% efficient boost LED driver for stadium lighting. It is suitable for large area and high lumens light sources, and can handle wide ranging inputs. It can be applied to various applications including LCD backlights, industrial and architectural lighting, automotive lights, streetlights, billboards, and stadium lights.
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LINEAR Dual Output Buck Regulator with Current Partitioning Optimizes Ef ciency in Space-Sensitive Applications Design Note 460 handbook
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LINEAR Reduce the Cost Complexity of Medium LCD LED Backlights with a Single Inductor LED Driver for 60 LEDs Design Note 462 Daniel Chen
This document introduces a method to reduce the cost and complexity of medium LCD LED backlights by using a single inductor LED driver. The driver can drive 60 LEDs simultaneously and has a built-in power switch to save space and design time.
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LINEAR Upgrade Your Microcontroller ADC to True 12-Bit Performance Design Note DN463 handbook
This article introduces the performance characteristics of the LTC2366 series microcontroller ADC, including AC and DC specifications, operating voltage and current, as well as packaging and adjustable parameters.
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LINEAR High Ef ciency USB Power Management System Safely Charges Li-Ion/Polymer Batteries from Automotive Supplies Design Note 464 handbook
This document describes a high-efficiency USB power management system that safely charges Li-Ion/Polymer batteries from automotive power supplies. The system is compact, robust, efficient, and easy to design, making it suitable for use in large transient environments.
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LINEAR LTC4099 Provides Unprecedented Control of USB Power Management Battery Charger Functions Using I 2C Design Note 1017 George H. Barbehenn
The LTC4099 USB power manager and Li-Ion/Polymer battery charger seamlessly manages power distribution from multiple sources in portable applications. It is differentiated from other USB power managers by its bidirectional I2C port that allows the host microprocessor to control and monitor all aspects of the USB power management and battery charging processes.
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LINEAR Ultralow Power Boost Converters Require Only 8.5 A of Standby Quiescent Current Design Note 465 handbook
Introduces a ultralow power boost converter, which only needs 8.5µA of standby quiescent current, and is suitable for applications that need to be in standby mode for a long time, such as industrial remote monitoring systems and keep-alive circuits.
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