TLC5947DAPRG4

Overview

The TLC5947DAPRG4 is a 24-channel, constant-current sink LED driver manufactured by Texas Instruments. It features individually adjustable channels with 4096 pulse-width modulated (PWM) steps for precise brightness control. The device operates on a single power supply ranging from 3V to 5.5V and supports an output voltage of up to 30V per channel. Each channel can deliver a maximum current of 30mA. The IC utilizes a serial interface for data input and includes an internal oscillator for PWM generation. It is housed in a 32-HTSSOP package and is designed for applications requiring high-density LED control.

Feature Summary

• Provides 24 independent constant-current sink channels for individual LED control
• Supports 12-bit resolution with 4096 PWM steps for fine brightness adjustment
• Integrates an internal oscillator to simplify timing requirements
• Utilizes a serial interface for efficient data transmission and daisy-chaining capability

Applications

• LED backlighting systems
• General LED lighting arrays
• Display panel illumination
• Consumer electronics indicator lights

Procurement Notes

Verify the specific ordering suffix 'G4' to ensure compliance with environmental standards such as RoHS. Confirm that the 32-HTSSOP package dimensions match your PCB footprint requirements. Check for any recent Product Change Notifications regarding assembly or material changes. Ensure the supply voltage range aligns with your system's power architecture before finalizing the component selection.

Selection Notes

Select this component when a high number of individually controllable LED channels is required within a compact surface-mount package. The internal oscillator eliminates the need for external clock components, reducing board space. Consider the 30mA per channel limit to ensure it meets the forward current requirements of your selected LEDs. Verify that the serial interface speed is compatible with your microcontroller's communication capabilities.

Part Context

The TLC5947 belongs to Texas Instruments' family of LED lighting driver ICs. It is part of the broader TLC594x series, which offers various channel counts and pin configurations. This specific variant provides a balance between channel density and control precision, making it suitable for complex lighting designs where individual channel dimming is necessary without excessive external circuitry.

Replacement Considerations

The TLC5947DAPR is a related variant in the same series. Note that DigiKey lists the TLC5947DAPRG4 as discontinued; verify availability through authorized distributors or consider alternative packages if supply chain stability is critical.