TLC5947DAPG4

Overview

The TLC5947DAPG4 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 dimming control. The device operates within a supply voltage range of 3 V to 5.5 V and delivers an output current of 30 mA per channel. It utilizes a linear shift register topology and includes an internal GS clock. The component is housed in a 32-HTSSOP package and supports a maximum operating frequency of 30 MHz.

Feature Summary

• Provides 24 individually adjustable constant-current sink channels
• Supports high-resolution dimming via 4096 PWM steps
• Integrates an internal oscillator for simplified system design

Applications

• LED backlighting systems
• General LED lighting applications
• Display panel illumination

Procurement Notes

Verify the specific suffix G4 indicates compliance with RoHS standards and restricts hazardous substances as defined by the manufacturer. Confirm the package type matches the required 32-HTSSOP footprint for PCB layout compatibility. Ensure the ordering quantity aligns with the tube packaging configuration typically associated with this variant. Cross-reference the datasheet revision to confirm electrical characteristics remain consistent with the target design specifications.

Selection Notes

Select this component when a high channel count is required for uniform LED array control without external multiplexing. The integrated PWM resolution eliminates the need for complex microcontroller timing loops. Consider the thermal performance within the HTSSOP package if driving multiple channels at full brightness simultaneously. Verify that the 30 mA output current meets the forward current requirements of the connected LEDs.

Part Context

This part belongs to the TLC5947 series of LED drivers from Texas Instruments. The series is designed for applications requiring multiple channels of constant-current regulation. The DAPG4 designation specifies the tape-and-reel or tube packaging and regulatory compliance status compared to other variants like the standard DAP.

Replacement Considerations

Direct substitutes include the TLC5947DAP and TLC5947DAPR. These variants share identical electrical specifications and pinouts but differ primarily in packaging format and regulatory suffixes.