Toshiba Semiconductor and Storage TB62D787FTG,EL

Overview

TB62D787FTG from Toshiba Electronic Devices & Storage Corporation is a 24-channel constant-current LED driver IC with integrated 7-bit PWM dimming control, single-wire serial interface, and per-color current-setting resistors (R/G/B). It delivers up to 40 mA per channel across three color blocks (R/G/B), operates from 7–28 V LED supply (VL) or separate 5 V logic supply (Vcc), and supports individual addressing of up to 64 drivers in daisy-chained LED lighting systems.

For engineers reviewing the TB62D787FTG datasheet, TB62D787FTG pinout, TB62D787FTG application, or TB62D787FTG equivalent, this page provides verified technical context on its single-wire data protocol, open-drain constant-current outputs for common-anode LEDs, thermal shutdown protection, and BiCD process–enabled high-speed data transfer - all critical for architectural decisions in RGB signage, architectural lighting, and display backlighting.

Technical Context

The TB62D787FTG implements a Manchester-encoded single-wire asynchronous interface where logic states are determined by transitions (H→L or L→H), eliminating clock line requirements. Its internal architecture divides the 24 outputs into three 8-channel groups (R/G/B), each configured via dedicated external current-setting resistors (REXT-R/G/B).

Each channel features an open-drain constant-current sink with 0.5 V minimum compliance voltage at 5–40 mA, and integrates independent 7-bit PWM counters synchronized to an internal oscillator. Addressing uses a 3-bit ID setting (ID0–ID2) enabling up to 64 unique slave addresses, with programmable modes including per-channel, all-channel, special (24-channel batch), 12-channel, and 6-channel data loading sequences.

Key Specifications

Pinout & Package

P-VQFN40-0606-0.50-001: 40-pin, 6 mm × 6 mm, 0.5 mm pitch, exposed thermal pad (must be connected to GND).

Key Features

Applications

Equivalent & Alternatives

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

Compared with TB62D786FTG, the TB62D787FTG adds integrated VLOUT for simplified power architecture, while AL8863SP-13 trades channel density and interface simplicity for higher conversion efficiency and flexibility in input voltage range - making TB62D787FTG optimal for scalable, low-complexity RGB LED systems.

Availability

TB62D787FTG is available at Aetrix Electronics and suitable for architectural lighting, RGB signage, large-panel backlighting, and stage lighting applications requiring stable component supply, long-term production continuity, and guaranteed traceability.

Supply support for TB62D787FTG 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 and manufactures semiconductor solutions for power management, motor control, and optical devices, with global manufacturing and quality certifications.

The TB62D787FTG belongs to Toshiba's BiCD-process LED driver family, engineered specifically for high-density RGB LED systems requiring single-wire scalability, thermal robustness, and per-color current precision.

FAQ

What is the maximum number of TB62D787FTG devices that can be addressed on a single data bus?

The TB62D787FTG supports up to 64 unique slave addresses via hardware-configurable ID0–ID2 pins (3-bit address space). Each device must have a distinct combination of GND/Vcc/REXT connections on these pins. The TB62D787FTG does not require address decoding circuitry - addressing is handled entirely within the IC's internal logic upon start command recognition.

How does the TB62D787FTG achieve constant current accuracy across all 24 channels?

The TB62D787FTG achieves ±3.0% constant-current accuracy between channels and ±6.0% between ICs by using matched internal current mirror structures and dedicated external resistors (REXT-R/G/B) per color group. Accuracy is specified at 15 mA output current and 0.5 V compliance voltage. Layout symmetry and Kelvin sensing of REXT pins further minimize PCB-induced errors in the TB62D787FTG design.

Can the TB62D787FTG drive common-cathode LED configurations?

No, the TB62D787FTG is designed exclusively for common-anode LED configurations. All 24 output pins (/OUTR0–/OUTB7) are open-drain constant-current sinks - they pull current from the LED anode toward PGND/GND. Driving common-cathode LEDs would require sourcing current, which the TB62D787FTG does not support. Attempting such use may result in improper operation or damage.

What happens if the TEST pin on the TB62D787FTG is left floating?

If the TEST pin (pin 29) is left floating, the TB62D787FTG will not operate normally - it may fail to initialize, exhibit erratic data reception, or remain in reset. The datasheet explicitly requires TEST to be connected to GND during normal operation. This pin is reserved for factory testing; any non-GND state (including open or high) disables functional behavior of the TB62D787FTG.

Does the TB62D787FTG support daisy-chaining, and how is it implemented?

Yes, the TB62D787FTG supports daisy-chaining via its DATA-OUT pin (pin 27), which buffers and retransmits the DATA-IN signal after internal processing. In a chain, DATA-IN of device N+1 connects to DATA-OUT of device N. Each device recognizes its own address and forwards unrecognized data - enabling single-controller control of dozens of TB62D787FTG devices with minimal wiring.