Key facts
- Brand
- Linear Technology
- Model
- LT3598
- Category
- Other Electronics
- Documents
- 2
- Languages
- EN
- Last added
- 2012-06-05
Start here
Linear Technology LT3598 Design Note 462: Medium LCD LED Backlights with Single Inductor Driver
This document describes a design solution using the LT3598 to reduce cost and complexity in medium-sized LCD displays by driving six strings of ten LEDs with a single inductor. The IC features built-in power switching, adaptive feedback loops for efficiency, and thermal derating capabilities.
The application note details typical configurations, including driving 60 LEDs at 20mA per string or combining channels to drive higher currents up to 90mA per string. It also covers channel disable functionality and PWM dimming performance.
Linear Technology LT3598 specifications
| Minimum Operating Voltage | 3.2 V |
|---|---|
| Maximum Operating Voltage | 30 V |
| Output Voltage | Up to 44 V |
| Switching Frequency | 200 kHz – 2.5 MHz (adjustable) |
| LED String Current | 20 mA |
All Linear Technology LT3598 documents by type
How to use the product for one specific task, with worked examples.
Ratings, dimensions and ordering codes, for selection and design work.
Questions answered in these manuals
How many LED strings can the LT3598 drive simultaneously?
The device drives six strings of ten LEDs at up to 30mA per string.
From: Linear Technology LT3598 Design Note 462: Medium LCD LED Backlights with Single Inductor Driver
What is the maximum current per string for multiple channel configurations?
Multiple channels can be combined to drive two strings at up to 90mA per string.
From: Linear Technology LT3598 Design Note 462: Medium LCD LED Backlights with Single Inductor Driver
What is the input voltage range for the LT3598?
The device operates from a minimum of 3.2 V up to a maximum of 30 V.
What is the maximum LED current per string?
Each LED string can be driven up to 20 mA.