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Product Detailed Parameters
- Description：IC LED DRV LIN I2C 57MA 28HTSSOP
- Series：-
- Mfr：NXP USA Inc.
- Package：Tape & Reel (TR),Cut Tape (CT)
- Type：Linear
- Topology：-
- Internal Switch(s)：Yes
- Number of Outputs：16
- Voltage - Supply (Min)：3V
- Voltage - Supply (Max)：5.5V
- Voltage - Output：20V
- Current - Output / Channel：57mA
- Frequency：8MHz
- Dimming：I2C
- Applications：Backlight
- Operating Temperature：-40°C ~ 85°C (TA)
- Mounting Type：Surface Mount
- Package / Case：28-TSSOP (0.173", 4.40mm Width) Exposed Pad
- Supplier Device Package：28-HTSSOP
- Grade：-
- Qualification：-
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Overview
The PCA9955ATWJ is a 16-channel Fm+ I2C-bus controlled constant current LED driver optimized for dimming and blinking applications. It provides 57 mA output current per channel with a maximum voltage of 20 V. The device operates within a supply voltage range of 3 V to 5.5 V and supports an I2C interface frequency up to 1 MHz. It is housed in an HTSSOP28 package and functions within a temperature range of -40 °C to +85 °C.
Feature Summary
- I2C-bus controlled 16-channel constant current LED driver
- Optimized for dimming and blinking Red/Green/Blue/Amber LEDs
- Supports fault detection and open-load detection
Applications
- Automotive interior lighting
- RGB LED applications
- General LED dimming control systems
Procurement Notes
Verify the exact suffix against official NXP documentation, as ordering codes may include specific packaging or tape-and-reel designators that do not alter the core electrical function. Confirm RoHS compliance status and lead times directly with authorized distributors. Ensure the component matches the required automotive qualification standards if used in vehicle interiors.
Selection Notes
Select this component when a high-channel-count LED driver with precise constant current regulation is required. It is suitable for designs needing independent channel control via a standard two-wire interface. Consider the thermal dissipation capabilities of the HTSSOP28 package relative to the total power consumption of all active channels.
Part Context
This part belongs to the PCA9955 family of LED drivers from NXP Semiconductors. It shares functional similarities with variants like the PCA9955BTW and PCA9955TW/Q900, differing primarily in packaging, suffix specifications, and minor electrical tolerances defined by the manufacturer's product line structure.
Replacement Considerations
The PCA9955BTW and PCA9955TW/Q900 are related variants within the same family. Verify pinout compatibility and specific electrical parameter limits before substitution. No other distinct substitute part numbers are publicly confirmed for direct replacement.
