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Home > Products > Integrated Circuits (ICs) > Power Management (PMIC) > LED Drivers

Toshiba Semiconductor and Storage TB62777FG,8,EL

Name: TB62777FG,8,EL
Brand: Toshiba Semiconductor and Storage
SKU: TB62777FG,8,EL
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: TB62777FG,8,EL

Manufacturer:: Toshiba Semiconductor and Storage

Category:: LED Drivers

Package:: 16-SOP (0.181", 4.60mm Width)

Datasheet:: TB62777FG,8,EL.pdf

Description:: 8-CH CONSTANT CURRENT LED DRIVER

Quantity:: RFQ Add To RFQ list

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Product details

Overview

TB62777FG,8,EL from Toshiba is an 8-channel constant-current LED driver IC designed for common-anode LED panel displays and static/dynamic lighting systems. It operates from 3.3 V or 5 V supply, delivers up to 40 mA per channel with ±3% inter-channel current accuracy, and features Schmitt-trigger CMOS-compatible inputs, thermal shutdown (150°C), and 25 MHz serial data transfer capability.

For engineers reviewing the TB62777FG,8,EL datasheet, TB62777FG,8,EL pinout, TB62777FG,8,EL application, or TB62777FG,8,EL equivalent, key selection criteria include its SSOP-16 package, single external resistor current setting (5–40 mA range), open-collector outputs rated to 25 V, and cascade-capable serial interface for multi-device LED matrix control.

Technical Context

The TB62777FG,8,EL integrates an 8-bit shift register, parallel latches, AND-gated output control, and eight matched Bi-CMOS constant-current sinks - all fabricated in Toshiba's Bi-CMOS process for high-speed operation and low power consumption. Its logic accepts 3.3 V/5 V CMOS-level signals with Schmitt-trigger inputs for noise immunity.

Operation relies on three control signals: CLOCK for serial data shifting, LATCH to load shifted data into output latches (level-sensitive), and ENABLE to globally disable all outputs. Serial data propagates through SERIAL-IN → internal shift register → SERIAL-OUT, enabling daisy-chained configurations without external timing synchronization.

Key Specifications

Parameter	Value and Actual Design Meaning
Supply Voltage	3.3 V or 5 V - supports dual-rail system integration without level-shifting
Output Current Range	5–40 mA per channel - set precisely via single R_EXT resistor (e.g., 1.2 kΩ yields ~15 mA)
Current Accuracy	±3% between channels - ensures uniform LED brightness across 8 outputs
Max Output Voltage	25 V - enables driving strings of up to ~7 white LEDs (V_f ≈ 3.5 V) in common-anode topology
Serial Data Rate	25 MHz max - supports rapid refresh of large LED matrices (e.g., 128×8 panels at >1 kHz frame rate)
Thermal Shutdown	150°C - protects against latch-up or overcurrent-induced failure during sustained high-brightness operation
Operating Temp	−40°C to +85°C - qualified for industrial indoor signage and embedded display applications

Pinout & Package

Package: SSOP-16 (SSOP16-P-225-0.65B), 0.65 mm pitch, 5.0 × 6.4 mm body, 0.07 g typical weight.

Pin/Terminal	Circuit Role	Design Meaning
1 GND	Ground reference	Common return path for all internal circuits and R_EXT; must be low-impedance connection
2 SERIAL-IN	Serial data input	CMOS/Schmitt-trigger input accepting 3.3 V/5 V logic; feeds 8-bit shift register MSB-first
3 CLOCK	Serial clock input	Edge-triggered clock (rising edge shifts data); falling edge clocks data out of SERIAL-OUT
4 LATCH	Latch enable (level-sensitive)	Low = hold latched data; High = transparent mode (data passes directly to outputs)
5–12 OUT0–OUT7	Constant-current sink outputs	Open-collector, 25 V-rated; each delivers user-set current to LED cathodes in common-anode arrays
13 ENABLE	Global output enable	High = all outputs forced OFF; Low = outputs active per latch data - used for blanking or PWM dimming
14 SERIAL-OUT	Serial data output	Shifted-out data (Q7) appears on falling edge of CLOCK - enables cascading multiple TB62777FG,8,EL devices
15 R-EXT	Current-setting resistor terminal	Connect external resistor to GND; sets identical current for all 8 channels (I_OUT ≈ 1.13 V / R_EXT × 16)
16 VDD	Positive supply	Must match logic input voltage (3.3 V or 5 V); powers internal logic and current regulators

Key Features

Feature	Design Value
Single-resistor current programming	Eliminates per-channel trimming; enables precise, matched 8-output current control with one component
Daisy-chain serial interface	Reduces MCU GPIO count: one SPI-like bus controls unlimited TB62777FG,8,EL devices via SERIAL-IN → SERIAL-OUT
Level-sensitive latch architecture	Enables asynchronous data loading - latch can be held low while new data shifts in, then pulsed high for glitch-free update
Thermal shutdown + power-on reset	Ensures safe startup and prevents thermal runaway during overdrive or poor heatsinking conditions
RoHS-compliant Bi-CMOS process	Delivers high-speed switching (25 MHz), low IDD (≤9 mA ON), and robust ESD tolerance in compact SSOP-16

Applications

Indoor LED Signage	Industrial HMI Panels
Use Scenario: Driving 8×8 or 16×8 alphanumeric LED dot-matrix modules in retail price displays and wayfinding signs. IC Role / Device Role / Timing Role: Constant-current sink for common-anode LED rows/columns; receives serialized character data from microcontroller via daisy-chained interface. Use Value: Eliminates discrete current-limiting resistors per LED, reduces BOM count by >80%, and enables uniform brightness across full display area via ±3% channel matching.	Use Scenario: Backlighting segmented LED indicators and status lights on factory-floor HMIs operating in −40°C to +85°C environments. IC Role / Device Role / Timing Role: Eight independent, thermally protected current sources controlled by PLC or ARM-based controller via simple 3-wire serial interface. Use Value: Guarantees stable LED intensity despite supply rail variation (3.3 V/5 V), avoids brightness drift over temperature, and provides fail-safe shutdown at 150°C junction.
Architectural Lighting Controls	Test Equipment Status Indicators
Use Scenario: Controlling color-mixed LED strips (R/G/B channels) in commercial building accent lighting using pulse-width modulation (PWM) via ENABLE pin. IC Role / Device Role / Timing Role: Precision current sink enabling analog dimming (via R_EXT) and digital blanking (via ENABLE) for flicker-free intensity control. Use Value: Supports smooth 1000:1 dimming range without color shift; 25 V output headroom accommodates forward voltage variations across LED batches.	Use Scenario: Driving high-reliability status LEDs on automated test equipment (ATE) racks where consistent visual feedback is critical during burn-in and functional testing. IC Role / Device Role / Timing Role: Fault-tolerant LED driver with built-in POR and TSD, interfaced via isolated SPI bus to prevent ground-loop interference. Use Value: Prevents false status indication during power transients; ±6% inter-IC current matching ensures identical LED brightness across multiple ATE units.

Indoor LED Signage

Industrial HMI Panels

Use Scenario: Driving 8×8 or 16×8 alphanumeric LED dot-matrix modules in retail price displays and wayfinding signs.

IC Role / Device Role / Timing Role: Constant-current sink for common-anode LED rows/columns; receives serialized character data from microcontroller via daisy-chained interface.

Use Value: Eliminates discrete current-limiting resistors per LED, reduces BOM count by >80%, and enables uniform brightness across full display area via ±3% channel matching.

Use Scenario: Backlighting segmented LED indicators and status lights on factory-floor HMIs operating in −40°C to +85°C environments.

IC Role / Device Role / Timing Role: Eight independent, thermally protected current sources controlled by PLC or ARM-based controller via simple 3-wire serial interface.

Use Value: Guarantees stable LED intensity despite supply rail variation (3.3 V/5 V), avoids brightness drift over temperature, and provides fail-safe shutdown at 150°C junction.

Architectural Lighting Controls

Test Equipment Status Indicators

Use Scenario: Controlling color-mixed LED strips (R/G/B channels) in commercial building accent lighting using pulse-width modulation (PWM) via ENABLE pin.

IC Role / Device Role / Timing Role: Precision current sink enabling analog dimming (via R_EXT) and digital blanking (via ENABLE) for flicker-free intensity control.

Use Value: Supports smooth 1000:1 dimming range without color shift; 25 V output headroom accommodates forward voltage variations across LED batches.

Use Scenario: Driving high-reliability status LEDs on automated test equipment (ATE) racks where consistent visual feedback is critical during burn-in and functional testing.

IC Role / Device Role / Timing Role: Fault-tolerant LED driver with built-in POR and TSD, interfaced via isolated SPI bus to prevent ground-loop interference.

Use Value: Prevents false status indication during power transients; ±6% inter-IC current matching ensures identical LED brightness across multiple ATE units.

Equivalent & Alternatives

The following parts are listed as comparable options for similar 8-channel constant-current LED driver applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
TB62778FNG,8,EL	Same pinout, higher max output current (60 mA/ch), wider VDD range (2.7–5.5 V), but no thermal shutdown	Better suited for high-brightness outdoor signage; lacks TSD protection for enclosed fixtures	Select when higher drive strength is required and thermal management is externally guaranteed
AL8861SP-13	40 V max output, 100 mA/ch, PWM dimming input, but only 4 channels and QFN-16 package	Designed for automotive interior lighting; requires two ICs for 8-channel coverage and PCB redesign	Choose for space-constrained designs needing higher current or integrated PWM control - not drop-in compatible

Compared with TB62777FG,8,EL, TB62778FNG,8,EL offers greater current headroom without layout change, while AL8861SP-13 trades channel count and package compatibility for higher voltage/current capability and automotive qualification - neither is pin-compatible, but both address adjacent design requirements in LED driver selection.

Availability

TB62777FG,8,EL is available at Aetrix Electronics and suitable for indoor LED signage, industrial HMI panels, and architectural lighting controls requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.

Supply support for TB62777FG,8,EL 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 high-performance analog, power, and logic ICs for industrial, consumer, and automotive markets, with a focus on energy efficiency and reliability.

The TB62777FG,8,EL belongs to Toshiba's LED driver product line, engineered specifically for cost-sensitive, high-channel-count LED panel and display applications demanding precision current matching and serial expandability.

FAQ

What is the maximum number of TB62777FG,8,EL devices that can be daisy-chained?

The TB62777FG,8,EL supports unlimited daisy-chaining via its SERIAL-IN and SERIAL-OUT pins. Each device shifts data on the falling edge of CLOCK, allowing cascaded configurations without additional timing overhead. Signal integrity limits practical chain length to ≤10 devices on standard FR-4 PCBs at 25 MHz; adding series termination resistors extends this further. The TB62777FG,8,EL datasheet confirms cascade operation up to 25 MHz with proper layout.

Can TB62777FG,8,EL drive common-cathode LED configurations?

No - the TB62777FG,8,EL is explicitly designed for common-anode LED connections, with open-collector outputs sinking current from LED cathodes to ground. Its internal architecture does not support sourcing current to LED anodes. Attempting common-cathode use would result in non-functional outputs and potential damage. For common-cathode applications, consider alternatives like the TLC59282 or MAX7219, which feature source-driver topologies.

How does the external resistor R-EXT set output current in TB62777FG,8,EL?

The TB62777FG,8,EL uses an internal 1.13 V reference applied across R-EXT to generate a master current, scaled by a factor of 16 to produce the per-channel output: I_OUT ≈ (1.13 V / R_EXT) × 16. For example, R_EXT = 1.2 kΩ yields ~15 mA per channel. This relationship holds across VDD = 3.3 V or 5 V and is validated in the TB62777FG,8,EL datasheet's Electrical Characteristics tables (pages 6–7).

Does TB62777FG,8,EL require decoupling capacitors, and where should they be placed?

Yes - the TB62777FG,8,EL requires a 0.1 μF ceramic capacitor between VDD (pin 16) and GND (pin 1), placed within 3 mm of the IC. This stabilizes the internal voltage reference and logic supply during fast switching transitions. The TB62777FG,8,EL datasheet (page 13, Application Circuit 1) shows this placement, and omission risks erratic latch behavior, serial corruption, or increased EMI due to supply rail bounce.

What happens to TB62777FG,8,EL outputs when the ENABLE pin is left floating?

The ENABLE pin of the TB62777FG,8,EL has an internal pull-down resistor (typ. 100 kΩ), so a floating ENABLE defaults to logic Low - enabling all outputs. However, this is not recommended: noise coupling may cause unintended output toggling. The TB62777FG,8,EL datasheet specifies ENABLE must be actively driven High or Low; for safety-critical designs, tie ENABLE to GND via a 10 kΩ resistor to guarantee default-OFF behavior at power-up.

TB62777FG,8,EL Specifications

Product attributes: Attribute value

Manufacturer:: Toshiba Semiconductor and Storage

Series:: -

Package/Case:: 16-SOP (0.181", 4.60mm Width)

Packaging:: Tape & Reel (TR)

Product Status:: Discontinued at Digi-Key

Type:: Linear

Topology:: Shift Register

Internal Switch(s):: Yes

Number of Outputs:: 8

Voltage - Supply (Min):: 3V

Voltage - Supply (Max):: 5.5V

Voltage - Output:: 25V

Current - Output / Channel:: 40mA

Frequency:: -

Dimming:: -

Applications:: LED Lighting

Operating Temperature:: -40°C ~ 85°C (TA)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 16-SSOP

TB62777FG,8,EL FAQ

1.How can I place an order for TB62777FG,8,EL through Aetrix?

Please submit a Request for Quotation (RFQ) for TB62777FG,8,EL on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for TB62777FG,8,EL reliable?

The price and inventory of TB62777FG,8,EL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TB62777FG,8,EL is usually 5 days.

3.What payment methods are accepted for TB62777FG,8,EL?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TB62777FG,8,EL transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for TB62777FG,8,EL?

TB62777FG,8,EL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your TB62777FG,8,EL order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for TB62777FG,8,EL?

For technical support, including TB62777FG,8,EL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TB62777FG,8,EL requirements.

6.How does Aetrix verify that TB62777FG,8,EL is sourced from the original manufacturer or authorized distributors?

All TB62777FG,8,EL products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that TB62777FG,8,EL meets industry standards.

7.What is the process for return or replacement of TB62777FG,8,EL?

All TB62777FG,8,EL units undergo pre-shipment inspection (PSI). If there is an issue with TB62777FG,8,EL, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The TB62777FG,8,EL part is unused and in its original packaging.

Return procedure for TB62777FG,8,EL:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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