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Product Detailed Parameters
- Description：IC LED DRIVER LINEAR 30MA 32VQFN
- Series：-
- Mfr：Texas Instruments
- Package：Tape & Reel (TR),Cut Tape (CT)
- Type：Linear
- Topology：Shift Register
- Internal Switch(s)：Yes
- Number of Outputs：24
- Voltage - Supply (Min)：3V
- Voltage - Supply (Max)：5.5V
- Voltage - Output：30V
- Current - Output / Channel：30mA
- Frequency：4MHz
- Dimming：-
- Applications：Backlight
- 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 TLC5947RHBT is a Texas Instruments LED lighting driver IC featuring 24 constant-current sink channels with 12-bit PWM dimming. It operates on a 3V to 5.5V supply, delivering up to 30mA per channel at a maximum output voltage of 30V. The device utilizes a shift register topology and supports a serial interface clock frequency of up to 4MHz. Packaged in a 32-VQFN (5x5mm) format, it functions within an ambient temperature range of -40°C to +85°C.
Feature Summary
- Integrates 24-channel linear LED drivers with independent 12-bit pulse-width modulation for precise brightness control.
- Features internal gray scale clock generation and serial data transfer via standard SPI-compatible interfaces.
- Includes thermal shutdown protection to safeguard the device during high-temperature operation or fault conditions.
Applications
- LED backlighting systems
- General LED illumination arrays
- Portable electronic display modules
Procurement Notes
Verify the specific package variant matches the required PCB footprint, as the TLC5947 series includes HTSSOP options. Confirm RoHS compliance status through official manufacturer documentation prior to integration. Ensure the selected part number suffix aligns with the intended reel or cut-tape packaging requirements for automated assembly processes.
Selection Notes
Select this component when designing circuits requiring high-density LED control with minimal external components. The integrated PWM capability reduces microcontroller processing load compared to software-based dimming solutions. Consider the 30mA current limit per channel when determining total power dissipation and thermal management strategies for the target application board.
Part Context
This part belongs to the TLC5947 family of LED drivers from Texas Instruments. It shares functional similarities with variants like the TLC5947DAPR but differs in physical packaging. The RHBT designation specifically identifies the 32-VQFN surface-mount package configuration suitable for compact consumer electronics designs.
Replacement Considerations
TLC5947DAPR offers identical electrical performance in a 32-HTSSOP package. Substitution requires verifying mechanical fit and reflow soldering profiles compatible with the alternative casing type.
