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Product Detailed Parameters
- Description：IC LED DRIVER LINEAR 40MA 32VQFN
- Series：-
- Mfr：Texas Instruments
- Package：Tape & Reel (TR),Cut Tape (CT),Bulk
- Type：Linear
- Topology：Shift Register
- Internal Switch(s)：Yes
- Number of Outputs：16
- Voltage - Supply (Min)：3V
- Voltage - Supply (Max)：5.5V
- Voltage - Output：17V
- Current - Output / Channel：40mA
- Frequency：30MHz
- Dimming：-
- Applications：Backlight, Signage
- Operating Temperature：-40°C ~ 85°C (TA)
- Mounting Type：Surface Mount
- Package / Case：32-VFQFN Exposed Pad
- Supplier Device Package：32-VQFN (5x5)
- Grade：-
- Qualification：-
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Overview
The TLC5946RHBR is a Texas Instruments LED display driver featuring 16 channels with 12-bit PWM resolution. It operates within a 3 V to 5.5 V supply range and supports up to 45 mA power dissipation. The device includes 6-bit dot correction for uniformity, error flagging, and fault detection capabilities such as open/short LED identification. Packaged in a VQFN-32 format, it functions between -40°C and +85°C.
Feature Summary
- Integrates 12-bit PWM dimming with 6-bit per-channel dot correction for high-fidelity color accuracy.
- Provides comprehensive diagnostic features including error flags and automatic detection of LED open or short circuits.
Applications
- High-resolution LED matrix displays
- Professional stage lighting fixtures
- Architectural accent lighting systems
Procurement Notes
Verify the specific suffix 'RHB' corresponds to the VQFN-32 package variant when sourcing. Confirm RoHS compliance status through official manufacturer documentation prior to integration. Ensure thermal management strategies align with the specified power dissipation limits during continuous operation.
Selection Notes
Select this component for designs requiring precise grayscale control without external microcontrollers for timing. Consider the VQFN-32 footprint constraints against available PCB real estate. Evaluate thermal performance requirements relative to the maximum operating temperature range and ambient conditions.
Part Context
This part belongs to the TLC5946 series, designed for scalable LED driving solutions. It complements other drivers like the TLC5947 by offering channel-specific correction. The RHBR designation indicates the specific tape-and-reel packaging configuration for surface-mount assembly processes.
Replacement Considerations
- TLC5946RHBRG4
FAQ
Does the TLC5946RHBR support daisy-chaining?
Yes, the device allows cascading multiple units to drive larger LED arrays using serial data lines.
What is the purpose of the dot correction feature?
Dot correction compensates for manufacturing variations in individual LEDs to ensure consistent brightness and color across the display.
