Texas Instruments TLC6C5912PWR

Overview

TLC6C5912PWR from Texas Instruments is a 12-channel, low-side open-drain DMOS LED driver with serial-in/parallel-out shift register architecture, operating from 3 V to 5.5 V supply, delivering 50 mA continuous sink current per channel at VCC = 5 V and supporting 40 V drain-to-source voltage - used in segmented LED display control for industrial HMI panels.

For engineers reviewing the TLC6C5912PWR datasheet, TLC6C5912PWR pinout, TLC6C5912PWR application, or TLC6C5912PWR equivalent, key selection criteria include thermal shutdown trip point (175°C typ), cascading SER OUT timing (falling-edge data transfer), global PWM dimming via G pin, and TSSOP-20 package compatibility with high-density LED matrix layouts.

Technical Context

The TLC6C5912PWR integrates two synchronized clock domains: SRCK controls 12-bit serial shift register loading on rising edges, while RCK latches data into the 12-bit D-type storage register - enabling independent data shifting and output updating. Its low-side DMOS outputs feature rDS(on) of 6.7–14.5 Ω across temperature and supply conditions, optimized for resistive-load LED driving.

Thermal shutdown activates at ~175°C junction temperature with 15°C hysteresis, forcing open-circuit output state until junction cools below ~160°C. The SER OUT pin provides phase-inverted serial output (data appears on SRCK falling edge), improving reliability in multi-device cascades by eliminating setup-time conflicts between clock and data propagation.

Key Specifications

Pinout & Package

Package: 20-pin TSSOP (PW), body size 6.50 mm × 4.40 mm, moisture sensitivity level 3 (260°C peak reflow, 168-hour floor life).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar LED driver applications.

Compared with TLC6C5912-Q1, the TLC6C5912PWR offers identical performance at lower cost and qualification overhead for non-automotive use; versus TPIC6B595N, it adds four channels and integrated thermal safety - eliminating need for external thermal monitoring in dense LED layouts.

Availability

TLC6C5912PWR is available at Aetrix Electronics and suitable for appliance display panels, elevator control interfaces, and PLC function indicators requiring stable component supply across multi-year production cycles.

Supply support for TLC6C5912PWR includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Texas Instruments is a U.S.-based semiconductor company specializing in analog, embedded processing, and power management ICs, with leadership in industrial, automotive, and communications markets.

The TLC6C5912PWR belongs to TI's power logic LED driver product line, designed specifically for microcontroller-based LED array control in harsh industrial environments where reliability, thermal resilience, and serial interface simplicity are essential.

FAQ

What is the maximum continuous current per channel for the TLC6C5912PWR?

The TLC6C5912PWR supports 50 mA continuous sink current per channel when VCC = 5 V and ambient temperature is 25°C. This rating decreases with rising temperature and supply voltage - e.g., at VCC = 3.3 V and TA = 105°C, rDS(on) increases, limiting practical continuous current to ~30 mA per channel under sustained load. Always verify thermal design using RθJA = 114.8°C/W.

Does the TLC6C5912PWR support PWM dimming, and how is it implemented?

Yes, the TLC6C5912PWR supports global PWM dimming via its active-low G (output enable) pin. Driving G with a PWM signal toggles all 12 outputs simultaneously, enabling uniform brightness control without modifying shift register data. The device's slow switching times (tr = 250 ns, tf = 200 ns) minimize EMI during PWM transitions - critical for compliance in industrial EMC environments.

Can multiple TLC6C5912PWR devices be cascaded, and what is required for reliable operation?

Yes, the TLC6C5912PWR supports daisy-chain cascading using SER_OUT to SER_IN connections. Reliable operation requires routing SER_OUT to the next device's SER_IN with matched trace lengths and terminating the final SER_OUT with a 10 kΩ pull-up. Because SER_OUT data appears on the falling edge of SRCK, cascaded devices avoid setup-time violations - enabling stable operation at up to 10 MHz clock frequency across 4+ stages.

What is the purpose of the CLR pin on the TLC6C5912PWR, and when should it be used?

The CLR (clear) pin on the TLC6C5912PWR is an asynchronous, active-low input that resets both the 12-bit shift register and the 12-bit storage register to zero. It should be asserted at power-up or system reset to ensure deterministic initial output states (all drains off), and during fault recovery to clear corrupted register contents - preventing unintended LED activation after brown-out or communication errors.

Is the TLC6C5912PWR compatible with 3.3 V microcontrollers, and what interface considerations apply?

Yes, the TLC6C5912PWR is fully compatible with 3.3 V microcontrollers: its VIH threshold is ≤2.4 V and VIL ≤0.7 V, ensuring reliable logic-level recognition. All control signals (SER_IN, SRCK, RCK, G, CLR) are 5 V-tolerant, so no level-shifting is needed. However, VCC must be supplied at 3.3 V (within 3–5.5 V range), and rDS(on) increases slightly versus 5 V operation - verify sink current capability at target LED current and temperature.