LTC3220
Linear Technology
Demonstration circuit 1265 is a 360mA Universal 18- Channel LED Driver with twelve white LEDs and two RGB LEDs featuring the LTC3220/LTC3220-1.
Design DocumentAnalog
DC1265A: 360mA Universal 18-Channel LED Driver featuring LTC3220/LTC3220-1
Demonstration circuit 1265 is an 18-channel LED driver board featuring the LTC3220/LTC3220-1 with I2C control, low-noise charge pump, and 64 dimming states.
Overview
Demonstration circuit 1265 showcases the LTC3220 and LTC3220-1, which are high-efficiency 360mA universal 18-channel LED drivers. The board is populated with twelve white LEDs and two RGB LEDs. The LTC3220 utilizes a low-noise charge pump with automatic mode switching (1x, 1.5x, and 2x) to maintain efficiency across various LED dropout voltages. All functions, including 64-step intensity dimming, blinking, gradation, and software shutdown, are managed via an I2C serial interface. The design requires only five small ceramic capacitors to form a complete LED power supply and current controller, operating from an input range of 2.9V to 5.5V.
Use Cases
- Handheld device backlighting
- Portable electronics displays
- RGB color lighting effects
- Multi-channel status indicators
- General purpose LED current regulation
Topics
LTC3220
LTC3220-1
LED Driver
Charge Pump
I2C LED Controller
18-Channel LED Driver
DC1265A
RGB LED Control
Linear Technology
Analog Devices
Referenced Parts
LTC3220-1
Linear Technology
The LTC3220/LTC3220-1 is a low noise charge pump designed to drive 18 universal LED (ULED) current sources.
| LTC3220 | Linear Technology | Demonstration circuit 1265 is a 360mA Universal 18- Channel LED Driver with twelve white LEDs and two RGB LEDs featuring the LTC3220/LTC3220-1. |
| LTC3220-1 | Linear Technology | The LTC3220/LTC3220-1 is a low noise charge pump designed to drive 18 universal LED (ULED) current sources. |