NXP 16-Channel I2C LED Controller, TSSOP-28

The NXP 16-Channel I²C LED Controller is an advanced solution optimised for LCD RGBA colour backlighting applications. Designed in a TSSOP-28 package, this controller features 16 individual LED outputs, each equipped with a 12-bit resolution (4096 steps) fixed frequency PWM controller. This allows for precise brightness adjustment, with a programmable frequency ranging from 40Hz to 1000Hz and a duty cycle adjustable from 0% to 100%.

As part of the Fast-mode Plus (Fm+) family, this device supports higher frequencies up to 1MHz and facilitates more densely populated bus operations of up to 4000pF. It includes a 25MHz internal oscillator that requires no external components, alongside an internal power-on reset and a noise filter on SDA/SCL inputs for reliable performance.

Key Features

• 16-channel LED control with individual 12-bit PWM
• Programmable frequency from 40Hz to 1000Hz
• Adjustable duty cycle from 0% to 100%
• Fast-mode Plus (Fm+) supporting up to 1MHz
• 25MHz internal oscillator requires no external components
• 5.5V tolerant inputs with no output glitches on power-up
• Supports hot insertion with low standby current
• Edge rate control on outputs to help reduce EMI
• Wide operating voltage range of 2.3V to 5.5V

This controller is highly versatile and suitable for a wide range of applications, including RGB or RGBA LED drivers, LED status indicators, displays, and keypad backlights for portable devices.