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Product Detailed Parameters
- Description：IC LED DRVR LINEAR 65MA 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：-
- Current - Output / Channel：65mA
- Frequency：-
- Dimming：-
- 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 PCA9955BTWJ is a 16-channel constant current LED driver IC manufactured by NXP Semiconductors, designed for precise RGB/RGBA LED control. It features an I2C interface operating at up to 1 MHz and supports output currents of 57 mA per channel with a maximum voltage tolerance of 40 V when off. The device includes individual 8-bit PWM resolution for brightness adjustment and group PWM capabilities for synchronized dimming or blinking. It operates within a supply voltage range of 3 V to 5.5 V and is housed in an HTSSOP-28 package.
Feature Summary
- Supports independent 8-bit PWM brightness control for each of the 16 channels
- Includes group PWM controller for synchronized dimming or blinking across all LEDs
- Features Fast-mode Plus I2C interface with high drive capability for capacitive buses
- Provides open/short load and overtemperature detection for error monitoring
Applications
- Amusement product lighting systems
- RGB/RGBA LED matrix displays
- Automotive interior ambient lighting
- Consumer electronics status indicators
Procurement Notes
Verify the specific suffix J indicates the standard tape and reel packaging configuration as documented by NXP. Confirm that the HTSSOP-28 package dimensions align with your PCB footprint requirements. Ensure the I2C bus capacitance does not exceed the 4000 pF limit specified for the Fast-mode Plus interface. Check for RoHS compliance documentation if required for your manufacturing process.
Selection Notes
Select this component when 16 individually addressable constant current outputs are required with high voltage tolerance. It is suitable for designs needing both individual channel precision and global synchronization via group PWM. Consider the PCA9952 if hardware OE pin support is needed, but note the PCA9955 offers additional address pins for larger system scaling.
Part Context
The PCA9955BTWJ belongs to the PCA9955 series of LED drivers from NXP Semiconductors. It is functionally identical to the PCA9952 except for having four hardware address pins instead of three and lacking the external output enable pin. This variant is optimized for applications requiring higher addressability on the I2C bus without external hardware control signals for global enabling.
Replacement Considerations
The PCA9952BTWJ is a compatible alternative with similar functionality but differs in having only three hardware address pins and including an output enable (OE) pin. Verify if the loss of the OE pin and the change in address pin count affect your system design before substitution.
