Key facts
- Brand
- Linear Technology
- Model
- LTC3220-1
- Category
- Other Electronics
- Documents
- 2
- Languages
- EN
- Last added
- 2012-06-05
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Linear Technology LTC3220/LTC3220-1 User's Guide Application Note 115
This document is Application Note 115 from Linear Technology, serving as a user's guide for the LTC3220 and LTC3220-1 Universal LED (ULED) Drivers. Published in February 2008 by Marty Merchant, it details how to program the device via I2C to control up to 18 LEDs individually.
The note covers key features such as linear dimming with 64-step control, blink modes with four patterns, and gradual on/off transitions. It also explains the General Purpose Output (GPO) functionality, which can operate in strong pull-down or current-limited modes to drive other devices while the main LED outputs are in shutdown.
Linear Technology LTC3220-1 specifications
| Number of Separate Outputs | 18 |
|---|---|
| Current Source Capability | 20mA Current Sources with 64-Step Linear Dimming Control |
| Input Supply Voltage Range | 2.9V to 5.5V |
| DVcc Supply Voltage Range | 1.5V to 5.5V |
| GPO Current Limit Mode Range | 0.4mA to 20mA in 63 steps |
Source: Linear Technology LTC3220/LTC3220-1 User's Guide Application Note 115
All Linear Technology LTC3220-1 documents by type
Day-to-day operation, settings and troubleshooting. Start here if the product is already set up.
Ratings, dimensions and ordering codes, for selection and design work.
Questions answered in these manuals
What is the difference between LTC3220 and LTC3220-1?
The only difference between the two devices is the 7-bit I2C address.
From: Linear Technology LTC3220/LTC3220-1 User's Guide Application Note 115
How many blinking patterns are available?
The device supports four different blinking patterns.
From: Linear Technology LTC3220/LTC3220-1 User's Guide Application Note 115
What is the maximum total output current of the LTC3220?
The device can deliver up to 360 mA total output current.
How many universal LED current sources does the LTC3220 provide?
It provides eighteen universal LED current sources.