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Product Detailed Parameters
- Description：IC LED DRIVER LINEAR 25MA 56QFN
- Series：-
- Mfr：Texas Instruments
- Package：Tape & Reel (TR),Cut Tape (CT)
- Type：Linear
- Topology：Shift Register
- Internal Switch(s)：Yes
- Number of Outputs：48
- Voltage - Supply (Min)：3V
- Voltage - Supply (Max)：5.5V
- Voltage - Output：10V
- Current - Output / Channel：25mA
- Frequency：-
- Dimming：-
- Applications：Signage
- Operating Temperature：-40°C ~ 85°C (TA)
- Mounting Type：Surface Mount
- Package / Case：56-VFQFN Exposed Pad
- Supplier Device Package：56-QFN (8x8)
- Grade：-
- Qualification：-
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Overview
The TLC59581RTQT is a 48-channel, 16-bit ES-PWM LED driver IC from Texas Instruments. It features adjustable sink current capability with 65,536-step pulse width modulation for each channel. The device supports 32-multiplexing and includes pre-charge FETs and LOD (LED Open Detection) Caterpillar functionality. It operates within a supply voltage range of 3V to 5.5V, delivering up to 10V output and 25mA per channel. Packaged in a 56-VFQFN (8x8mm) with exposed pad, it functions between -40°C and +85°C.
Feature Summary
- Provides independent pixel-level LED PWM control via 16-bit resolution across 48 channels
- Integrates pre-charge FETs to manage LED turn-on transients and reduce power consumption
- Includes LOD Caterpillar circuitry for detecting open LED conditions in series strings
- Supports high multiplexing rates up to 32:1 for efficient display driving
Applications
- Large-scale LED video displays
- Architectural lighting systems
- Digital signage panels
Procurement Notes
Verify the specific suffix RTQT corresponds to the 56-QFN package and tape-and-reel or cut-tape availability as required. Confirm RoHS compliance status and moisture sensitivity level (MSL 3) requirements for your assembly process. Ensure the design accounts for the thermal performance of the exposed pad in the VQFN-56 package under maximum load conditions.
Selection Notes
Select this component when high-resolution grayscale control is required for large LED matrices. The 16-bit PWM depth ensures smooth dimming without visible flicker. Consider the 48-channel density and multiplexing support if board space is limited compared to lower-density drivers. Verify that the 25mA per channel rating meets the forward current requirements of the selected LED modules.
Part Context
This part belongs to the TLC59581/82 family of LED drivers designed for high-performance display applications. It shares functional similarities with the TLC5958 but offers enhanced features like pre-charge FETs and improved LOD detection. The RTQT designation specifically identifies the QFN-56 package variant suitable for surface-mount assembly in compact electronic designs.
Replacement Considerations
The TLC5958RTQR is listed as a parameter-equivalent substitute. Verify pin compatibility and electrical specifications before substitution. Note that packaging differences may exist between the RTQT and RTQR variants.
