PCA9685BS,118

Overview

The PCA9685BS,118 is a 16-channel LED display driver from NXP Semiconductors, housed in an HVQFN28 package. It operates on a supply voltage range of 2.3 V to 5.5 V with a maximum power dissipation of 400 mW. The device features a 1 MHz I2C interface and provides independent 12-bit PWM control for each channel. Output drivers support up to 25 mA sink current at 5 V, with a high-level output current of 10 uA. Operating temperatures range from -40°C to +85°C.

Feature Summary

• Supports 16 independent channels with 12-bit resolution PWM controllers for precise brightness adjustment.
• Features staggered output switching capability to minimize current surges during LED activation.
• Includes external clock input pin for synchronization with user-provided clocks up to 50 MHz.
• Operates within the Fast-mode Plus (Fm+) family, supporting bus frequencies up to 1 MHz.

Applications

• Red/green/blue/amber (RGBA) color backlighting systems
• LCD backlight control applications
• Ambilight lighting effects
• LED matrix displays requiring synchronized multi-device operation

Procurement Notes

Verify the specific suffix 'BS,118' against the manufacturer's official documentation to confirm the HVQFN28 package type and tape-and-reel packaging configuration. Ensure that the automotive qualification status matches project requirements, as standard and automotive variants may differ in reliability specifications. Cross-reference the datasheet revision date to confirm compatibility with current design constraints.

Selection Notes

Select this component when 12-bit PWM resolution and staggered switching are required to manage inrush currents. The Fm+ I2C interface supports higher bus speeds and capacitance compared to standard I2C devices. Consider the external clock input feature if system-wide synchronization across multiple LED controllers is necessary for uniform timing.

Part Context

The PCA9685 series represents an evolution from the PCA9635, offering enhanced features for complex lighting applications. Unlike its predecessor, it provides 12-bit PWM resolution instead of 8-bit and includes programmable delay for staggered outputs. The BS variant specifically denotes the HVQFN28 package, distinguishing it from TSSOP-28 alternatives like the PW version.

Replacement Considerations

PCA9685PW,118 offers identical functionality in a TSSOP-28 package. PCA9685PW/Q900,118 is the automotive-grade equivalent. Verify package footprint compatibility when substituting between BS and PW variants.