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Product Detailed Parameters
- Description：IC LED DRVR LIN PWM 25MA 28TSSOP
- Series：-
- Mfr：NXP USA Inc.
- Package：Tube
- Type：Linear
- Topology：-
- Internal Switch(s)：Yes
- Number of Outputs：16
- Voltage - Supply (Min)：2.3V
- Voltage - Supply (Max)：5.5V
- Voltage - Output：5.5V
- Current - Output / Channel：25mA
- Frequency：-
- Dimming：PWM
- Applications：Backlight
- Operating Temperature：-40°C ~ 85°C (TA)
- Mounting Type：Surface Mount
- Package / Case：28-TSSOP (0.173", 4.40mm Width)
- Supplier Device Package：28-TSSOP
- Grade：-
- Qualification：-
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Overview
The PCA9685PW,112 is an I²C-bus controlled 16-channel LED controller optimized for RGBA color backlighting. It features a 12-bit PWM resolution (4096 steps) with programmable frequencies from 24 Hz to 1526 Hz. The device operates on a supply voltage of 2.3 V to 5.5 V and supports Fm+ speeds up to 1 MHz. Outputs provide 25 mA sink current or 25 mA sink/10 mA source in totem-pole mode. It includes staggered output timing to minimize current surges and an external clock input for synchronization.
Feature Summary
- Supports 12-bit PWM resolution for precise brightness control across 16 channels
- Enables staggered LED output timing to reduce power supply current surges
- Includes external clock input pin for multi-device synchronization
- Features software-programmable full-call and sub-call I²C addresses
Applications
- LCD RGBA color backlighting systems
- LED display driver circuits
- Ambilight lighting applications
- Multi-device synchronized LED arrays
Procurement Notes
Verify the specific suffix '112' against the manufacturer's official documentation to confirm package type and tape/reel specifications. Confirm RoHS compliance status as indicated in the datasheet. Check the product lifecycle status, as some sources indicate end-of-life or obsolescence warnings. Ensure the ordering part number matches the exact TSSOP-28 variant required for your design.
Selection Notes
Select this component when high-resolution 12-bit dimming is required for RGBA backlighting. Choose over similar models like PCA9635 if staggered output timing, external clock synchronization, or higher PWM resolution is necessary. Verify that the 2.3 V to 5.5 V operating range aligns with the system power architecture. Consider the Fm+ bus speed capabilities for dense bus environments.
Part Context
The PCA9685 series belongs to NXP's Fast-mode Plus (Fm+) family, supporting I²C speeds up to 1 MHz. This model specifically utilizes the TSSOP-28 package. It serves as an advanced solution compared to earlier generations, offering enhanced features such as independent channel delay programming and external clock inputs for complex lighting control systems.
Replacement Considerations
Public confirmed substitute part numbers include PCA9685PW/Q900,118. Verify compatibility regarding automotive qualification and packaging differences before substitution.
