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Product Detailed Parameters
- Description：IC LED DRIVER LINEAR 60MA 32VQFN
- Series：-
- Mfr：Texas Instruments
- Package：Tape & Reel (TR)
- Type：Linear
- Topology：Shift Register
- Internal Switch(s)：Yes
- Number of Outputs：16
- Voltage - Supply (Min)：3V
- Voltage - Supply (Max)：5.5V
- Voltage - Output：3V ~ 15V
- Current - Output / Channel：60mA
- Frequency：30MHz
- Dimming：-
- Applications：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 TLC5944RHBR is a Texas Instruments LED driver IC featuring 16 constant-current channels in a VQFN-32 package. It supports a supply voltage range of 3V to 5.5V with a maximum output current of 60mA per channel and an external reference voltage up to 30V. The device operates within a temperature range of -40°C to +85°C and utilizes a 30MHz SPI-compatible interface for grayscale and duty cycle control.
Feature Summary
- Integrates 16-channel constant-current sinks with independent 12-bit grayscale PWM control for precise brightness adjustment.
- Includes on-chip dot correction circuitry to compensate for manufacturing variations across LEDs, ensuring uniform color appearance.
- Features an error flag output that signals open or short circuit conditions in the LED load connections.
Applications
- High-density LED display panels requiring uniform luminance
- Backlighting systems for LCD modules
- General-purpose multi-channel LED lighting arrays
Procurement Notes
Verify the specific suffix 'RHBR' corresponds to the tape-and-reel packaging configuration required for your assembly line. Confirm RoHS compliance status through the manufacturer's official documentation before finalizing procurement orders.
Selection Notes
Select this component when 16 individually controllable channels are sufficient for the design. Ensure the application requires linear constant-current sinking rather than boost topology. Verify that the PCB layout can accommodate the thermal dissipation requirements of the VQFN-32 package under maximum load conditions.
Part Context
This part belongs to the TLC594x series of LED drivers from Texas Instruments. It shares architectural similarities with the TLC5940 and TLC5946 but distinguishes itself through its specific 60mA output capability and integrated dot correction features tailored for high-quality visual displays.
Replacement Considerations
The TLC5944RHBRG4 is a verified lead-free variant of this component. Designers should verify pin compatibility and electrical specifications when substituting between standard and G4 suffixes.
FAQ
How does the dot correction feature function?
Dot correction allows users to store unique 12-bit values for each channel in internal registers, compensating for individual LED brightness variations to achieve uniform color and intensity across the array.
What interface is used for data input?
The device uses a serial interface compatible with standard SPI, utilizing SIN, SCLK, and GSCLK pins for receiving grayscale and duty cycle data.
