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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),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：-
- 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 TLC5957RTQT is a Texas Instruments LED lighting driver IC featuring a linear topology and shift register interface. It provides sixteen constant-current outputs with a per-channel current of 25 mA. The device operates on a supply voltage range from 3 V to 5.5 V and supports a maximum working frequency of 33 MHz. It is housed in a 56-VFQFN package with exposed pad, designed for surface mount installation. The component functions within an ambient temperature range of -40°C to +85°C.
Feature Summary
- Integrates sixteen independent constant-current sink channels for precise LED control
- Utilizes a serial shift register interface for data input and latch functionality
- Includes internal thermal shutdown protection to safeguard against overheating
Applications
- Signage illumination systems
- LED backlighting drivers
- General LED lighting applications
Procurement Notes
Verify the specific suffix RTQT corresponds to the reel or cut tape packaging variant required for your assembly line. Confirm the 56-QFN footprint dimensions match your PCB layout constraints. Ensure the operating temperature range aligns with your environmental specifications. Cross-reference the datasheet revision history for any recent design or material changes that may affect compatibility.
Selection Notes
Select this component when a high channel count with moderate current capability is required. The linear topology suits applications where efficiency is secondary to cost and simplicity. Consider the 56-pin QFN package for space-constrained designs. Evaluate the 33 MHz clock speed against your system's refresh rate requirements to ensure adequate performance without excessive power consumption.
Part Context
This part belongs to the TLC5957 series of LED drivers from Texas Instruments. It shares functional similarities with other members like the TLC5957RTQR, differing primarily in packaging format. The series is designed for applications requiring multiple individually controllable LED channels with integrated dimming capabilities via PWM.
Replacement Considerations
The TLC5957RTQR is a documented alternative offering identical electrical characteristics but potentially different packaging options such as Digi-Reel. Verify pinout compatibility and thermal performance before substitution.
