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Home » NEWEST Products » New by Manufacturer » NXP Semiconductors » LED Drivers for Lighting Control Systems - NXP
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NXP LED Drivers for Lighting Control Systems

NXP LED Drivers for Lighting Control Systems

NXP LED Drivers for Lighting Control Systems

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NXP Semiconductors PCA9622 16-bit LED Driver is an I²C-bus controller device optimized for voltage switch dimming and blinking 100mA RGBA LEDs. Each LED output has its own 8-bit fixed frequency individual PWM controller that operates at 97kHz with a duty cycle that is adjustable from 0 to 99.6% to allow the LED to be set to a specific brightness value. The NXP PCA9622 LED Driver is one of the first LED controller devices in a new Fast-mode Plus (Fm+) family. Fm+ devices offer higher frequency (up to 1MHz) and more densely populated bus operation (up to 4000pF). Each LED output can be off, on (no PWM control), set at its individual PWM controller value or at both individual and group PWM controller values. The NXP PCA9622 LED Driver operates with a supply voltage range of 2.3V to 5.5V and the 100mA open-drain outputs allow voltages up to 40V.


Features
  • 16 LED drivers. Each output programmable at:
    • Off
    • On
    • Programmable LED brightness
    • Programmable group dimming/blinking mixed with individual LED brightness
  • 1MHz Fast-mode Plus compatible I²C-bus interface with 30mA high drive capability on SDA output for driving high capacitive buses
  • 256-step (8-bit) linear programmable brightness per LED output varying from fully off (default) to maximum brightness using a 97kHz PWM signal
  • 256-step group brightness control allows general dimming (using a 190Hz PWM signal) from fully off to maximum brightness (default)
  • 256-step group blinking with frequency programmable from 24Hz to 10.73s and duty cycle from 0pct to 99.6pct
  • Sixteen open-drain outputs can sink between 0mA to 100mA and are tolerant to a maximum off state voltage of 40V. No input function.
  • Output state change programmable on the Acknowledge or the STOP Command to update outputs byte-by-byte or all at the same time (default to 'Change on STOP').
  • Active LOW Output Enable input pin allows for hardware blinking and dimming of the LEDs
  • 7 hardware address pins allow 126 PCA9622 devices to be connected to the same I²C-bus and to be individually programmed
Applications
  • RGB or RGBA LED drivers
  • LED status information
  • LED displays
  • LCD backlights
  • Keypad backlights for cellular phones or handheld devices

Block Diagram
Block Diagram

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NXP's PCA9952 16-Channel Constant Current LED Drivers is a I2C-bus controlled 16-channel constant current LED driver optimized for dimming and blinking 57 mA Red/Green/Blue/Amber (RGBA) LEDs in amusement products. Each LED output has its own 8-bit resolution (256 steps) fixed frequency individual PWM controller that operates at 31.25 kHz with a duty cycle that is adjustable from 0 % to 99.6 % to allow the LED to be set to a specific brightness value. An additional 8-bit resolution (256 steps) group PWM controller has both a fixed frequency of 122 Hz and an adjustable frequency between 15 Hz to once every 16.8 seconds with a duty cycle that is adjustable from 0 % to 99.6 % that is used to either dim or blink all LEDs with the same value.


Features
  • 16 LED drivers. Each output programmable at:
    • Off
    • On
    • Programmable LED brightness
    • Programmable group dimming/blinking mixed with individual LED brightness
    • Programmable LED output enable delay to reduce EMI and surge currents
  • 16 constant current output channels can sink up to 57mA, tolerate up to 40V when OFF
  • Output current adjusted through an external resistor
  • Output current accuracy
    • 6% between output channels
    • 8% between PCA9952 devices
  • Open/short load/overtemperature detection mode to detect individual LED errors
  • 1MHz Fast-mode Plus compatible I2C-bus interface with 30mA high drive capability on SDA output for driving high capacitive buses
  • 256-step (8-bit) linear programmable brightness per LED output varying from fully off (default) to maximum brightness using a 31.25kHz PWM signal
  • 256-step group brightness control allows general dimming (using a 122Hz PWM signal) from fully off to maximum brightness (default)
  • 256-step group blinking with frequency programmable from 15Hz to 16.8 s and duty cycle from 0% to 99.6%
  • Output state change programmable on the Acknowledge or the STOP Command to update outputs byte-by-byte or all at the same time (default to 'Change on STOP')
  • Active LOW Output Enable (OE) input pin (only on PCA9952) allows for hardware blinking and dimming of the LEDs
  • Four hardware address pins allow 16 PCA9955 devices to be connected to the same I2C-bus and to be individually programmed
  • 8 MHz internal oscillator requires no external components
  • Internal power-on reset
  • Noise filter on SDA/SCL inputs
  • No glitch on LED on power-up
  • Low standby current
  • Operating power supply voltage (VDD) range of 3V to 5.5V
  • 5.5V tolerant inputs on non-LED pins
Applications
  • Amusement products
  • RGB or RGBA LED drivers
  • LED status information
  • LED displays
  • LCD backlights
  • Keypad backlights for cellular phones or handheld devices

Block Diagram
NXP UBA3070 LED Backlight Driver IC

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NXP UBA3070 driver IC is the first member of a first generation of power-efficient LED backlight driver ICs. Highly efficient, flexible and reliable LED drivers can easily be designed using the UBA3070 control IC. This NXP switch-mode buck controller drives strings of LEDs up to 600V power efficiently.


Features
  • Switch-mode buck controller that drives strings of LEDs up to 600V power-efficiently
  • Controller with power-efficient Boundary Conduction Mode (BCM) operation:
    • Virtually no reverse recovery losses in freewheel diode
    • Zero Current Switching (ZCS) at switch, switch-on
    • Zero voltage or valley switching at switch, switch-on
    • Minimal required inductance value and size
  • Suitable for direct Pulse Width Modulation (PWM) dimming
  • Fast transient response through cycle-by-cycle current control, thereby:
    • Preventing over or undershoots in the Light Emitting Diode (LED) current
    • Enabling efficient PWM dimming by quickly turning the converter on and off and thus removing the need for extra dimming switches and high-side drivers
  • Single controlled input voltage required for all UBA3070 driven LED strings in RGB or white backlighting units
  • No binning on LED forward voltage required
Applications
  • High voltage LED lighting applications
  • LED backlighting in LCD televisions and monitors
  • General lighting applications

Block Diagram
Block Diagram

NXP Video: UBA3070 LED driver IC with Boundary Conduction Mode
  • NXP Semiconductors
  • Lighting
  • Optoelectronics|Drivers|Semiconductors|Integrated Circuits|Driver ICs