What are the key specifications of the PCA9685?

It operates from 2.3V to 5.5V, supports a PWM frequency range of 24Hz to 1526Hz, provides 25mA sink current per channel, and includes a programmable prescaler for synchronizing multiple devices.

What should engineers review before using the PCA9685?

Engineers should verify the output driver mode (open-drain or totem pole) in the MODE2 register, as incorrect settings can lead to IC overheating, especially when using LEDs with integrated Zener diodes.

How does the PCA9685 handle current surges?

The device allows for staggered LED output on and off times, which are independently programmable for each of the 16 channels to minimize current surges.

What is the pinout of PCA9685BS,118?

Use the PCA9685BS,118 datasheet for the official pinout diagram and pin names. In PartGenie, ask Datasheet AI about PCA9685BS,118 pinout to locate pins, power rails, and interface signals before layout.

PCA9685BS,118 Datasheet, Specs, Alternatives & ECAD | NXP Semiconductors

AI summary

The PCA9685 is a 16-channel, 12-bit PWM LED controller designed for RGBA backlighting and LED display applications, featuring an I2C-bus interface and flexible output configuration.

Best for

RGBA color backlighting
LCD and keypad backlighting
LED display systems requiring synchronized dimming

Avoid if

Applications requiring high-current drive beyond 25mA per channel without external drivers.

Check before use

MODE2 register configuration
Decoupling capacitor placement

Key specifications

Channels: 16
Resolution: 12-bit
Supply Voltage: 2.3V to 5.5V
PWM Frequency: 24Hz to 1526Hz

Compliance & Environment

RoHS: Y
REACH: -
MSL: -
ECCN: EAR99
HTSUS: 8542390001.0

Application

RGBA BacklightingLED DisplaysLCD Backlights

Datasheet

sf-00081933.pdf

800 KB

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Alternative components

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Design and risk insights

Questions & answers

The PCA9685 is an I2C-bus controlled 16-channel LED controller with 12-bit PWM resolution, specifically optimized for color backlighting and display applications.

AI summary

Best for

Avoid if

Check before use

Key specifications

Compliance & Environment

Application

Datasheet

CAD Models

Alternative components

Design and risk insights

Questions & answers

What is the PCA9685?+×

What are the key specifications of the PCA9685?+×

What should engineers review before using the PCA9685?+×

How does the PCA9685 handle current surges?+×

What is the pinout of PCA9685BS,118?+×