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PCA9956B

PCA9956B

NXP Semiconductors
Multi-channel LED driver alternative suitable for matrix and panel lighting applications.
Active3,330 in stock
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Overview

The NXP PCA9956B is a 24-channel constant current LED driver with an I2C-bus interface, designed for LED dimming and control. Each channel provides individual 8-bit brightness control and 8-bit group dimming/blinking control. It supports open/short load and overtemperature detection, making it suitable for robust lighting applications.

Why Choose This Part

This LED driver offers 24 independent constant current outputs, simplifying the design for multi-LED systems. Its integrated open/short load and overtemperature detection enhance system reliability. The I2C-bus interface allows for easy control from a host microcontroller, reducing pin count requirements.

Applications

RGB/RGBA LED Display Panels
Driving individual color channels in matrix LED displays for vibrant, dynamic lighting effects.
Backlight Control
Managing backlighting for LCDs and other displays, offering precise brightness adjustment.
Architectural Lighting
Controlling multiple LED strings in smart building and decorative lighting installations.
Automotive Interior Lighting
Providing dimmable LED control for instrument clusters, cabin lighting, and ambient effects.
Medical Device Status Indicators
Implementing multi-color status indicators with fine-grained control for user interfaces.

Key Specifications

Type Linear
Dimming PWM
Applications Backlight
Mounting Type Surface Mount
Package / Case 38-TFSOP (0.173", 4.40mm Width) Exposed Pad
Number of Outputs 24
Internal Switch(s) Yes
Operating Temperature -40degC ~ 85degC (TA)
Voltage - Supply (Max) 5.5V
Voltage - Supply (Min) 3V
Supplier Device Package 38-HTSSOP
Current - Output / Channel 65mA

Getting Started

To get started with the PCA9956B, connect it to an I2C-bus master like an NXP LPC or Kinetis microcontroller. Utilize the provided application notes and example code for I2C communication and register configuration to control the LED outputs and dimming functions. Ensure proper external current setting resistors are selected for the desired LED current.

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