Toshiba Semiconductor and Storage TB62D612FTG,EL

Overview

TB62D612FTG from Toshiba Electronic Devices & Storage Corporation is a 24-channel constant-current LED driver IC designed for RGB LED display lighting systems operating from 3.3 V or 5 V supply rails. It integrates 7-bit PWM dimming control per channel, three independent current-setting resistor inputs (Rext-R/G/B), and I²C-compatible serial interface (SDA/SCLK) with up to 64-device addressability for large-scale LED matrix control.

For engineers reviewing the TB62D612FTG datasheet, TB62D612FTG pinout, TB62D612FTG application, or TB62D612FTG equivalent, key selection considerations include its open-drain constant-current outputs (±3.0% inter-channel accuracy), thermal shutdown at 150°C, 28 V max output voltage capability, and BiCD process-enabled high-speed data transfer up to 10 MHz SCLK - critical for real-time LED brightness synchronization in signage and panel backlighting.

Technical Context

The TB62D612FTG implements a fully integrated 24-channel constant-current architecture segmented into three 8-channel blocks (R/G/B), each calibrated via dedicated external resistors (Rext-R, Rext-G, Rext-B) to ensure precise color balance. Its 7-bit PWM generator operates with a fixed internal 128-step counter synchronized to a period command, enabling deterministic timing for frame-aligned dimming updates across multiple daisy-chained devices.

Control is executed via a two-wire serial interface (SDA/SCLK) supporting slave address configuration through three ID pins (ID0–ID2), allowing up to 64 unique addresses using voltage-level encoding (GND, 1/3Vcc, 2/3Vcc, Vcc). The device features Schmitt-trigger CMOS inputs compatible with both 3.3 V and 5 V logic, thermal shutdown (TSD) with hysteresis, and Power-On Reset (POR) that initializes all registers to default states upon Vcc ramp-up.

Key Specifications

Pinout & Package

Package: P-WQFN36-0606-0.50-001 - 36-pin, 6 mm × 6 mm, 0.5 mm pitch, exposed thermal pad, RoHS-compliant wettable flank package optimized for thermal dissipation in high-density LED driver layouts.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TB62D612FTG, TB62D613FTG offers superior color fidelity and ruggedness at slightly higher cost and firmware complexity, while IS31FL3733-QFLS4 trades RGB calibration precision for integration density and cost efficiency in non-critical lighting.

Availability

TB62D612FTG is available at Aetrix Electronics and suitable for LED video signage, industrial display backlights, architectural lighting controls, and stage lighting systems requiring stable component supply, long-term production continuity, and guaranteed traceable sourcing.

Supply support for TB62D612FTG 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

Toshiba Electronic Devices & Storage Corporation designs high-performance analog and mixed-signal ICs for industrial, automotive, and consumer applications, with emphasis on energy efficiency, reliability, and system-level integration.

The TB62D612FTG belongs to Toshiba's LED driver product line engineered specifically for high-resolution RGB display systems requiring precise per-channel current control, scalable addressing, and robust thermal management in compact form factors.

FAQ

What is the maximum number of TB62D612FTG devices that can be controlled on a single I²C bus?

The TB62D612FTG supports up to 64 unique slave addresses via three ID pins (ID0–ID2) configured with four voltage levels (GND, 1/3Vcc, 2/3Vcc, Vcc). Each combination yields a distinct 7-bit address, enabling daisy-chained control of 64 TB62D612FTG ICs on one I²C bus without address conflict or additional hardware.

How does the TB62D612FTG achieve color accuracy across RGB channels?

The TB62D612FTG achieves color accuracy by providing three independent constant-current calibration paths: Rext-R sets current for all /OUTRx pins, Rext-G for /OUTGx, and Rext-B for /OUTBx. This allows precise adjustment of red, green, and blue luminance ratios - critical for white-point stability and gamut accuracy - without relying on software-based current trimming.

What happens to TB62D612FTG outputs during thermal shutdown?

When the TB62D612FTG junction temperature reaches 150°C, its thermal shutdown (TSD) circuit disables all 24 constant-current outputs immediately. Internal PWM and address registers retain their state. Outputs automatically resume once die temperature falls below ~120°C (30°C hysteresis), ensuring safe restart without MCU intervention or reinitialization.

Can TB62D612FTG drive LEDs with forward voltages exceeding 5 V?

Yes - the TB62D612FTG supports output voltages up to 28 V, making it suitable for driving series-connected LEDs with combined forward voltages well above 5 V. Its open-drain outputs operate in saturation mode with only 0.4 V dropout at 15 mA, preserving headroom for high-Vf emitters like deep-red (660 nm) or UV LEDs in common-anode configurations.

Is the TB62D612FTG compatible with both 3.3 V and 5 V microcontroller I/O levels?

Yes - the TB62D612FTG features Schmitt-trigger inputs with voltage-threshold scaling: VIH = 0.7 × Vcc and VIL = 0.3 × Vcc. When powered from 3.3 V, it accepts 2.31 V as logic high; at 5 V, 3.5 V suffices. This guarantees reliable communication with both 3.3 V and 5 V MCUs without external level shifters.