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Toshiba Semiconductor and Storage TB62777FNG,C8,EL
- Part No.:
- TB62777FNG,C8,EL
- Manufacturer:
- Toshiba Semiconductor and Storage
- Category:
- LED Drivers
- Package:
- 16-LSSOP (0.173", 4.40mm Width)
- Datasheet:
-
TB62777FNG,C8,EL.pdf
- Description:
- IC LED DRIVER LINEAR 40MA 16SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:14,707
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Product details
Overview
TB62777FNG,C8,EL from Toshiba is an 8-channel constant-current LED driver IC designed for common-anode LED panel displays and static/dynamic LED 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 serial-in/serial-out cascade capability at up to 25 MHz for scalable LED control.
For engineers reviewing the TB62777FNG,C8,EL datasheet, TB62777FNG,C8,EL pinout, TB62777FNG,C8,EL application, or TB62777FNG,C8,EL equivalent, key selection criteria include its SSOP-16 package, Schmitt-trigger CMOS-compatible inputs, thermal shutdown (150°C), and external resistor–set current programming - all critical for reliable LED current regulation in space-constrained display drivers.
Technical Context
The TB62777FNG,C8,EL integrates an 8-bit shift register, parallel latches, AND-gated output control, and eight matched constant-current sinks fabricated in Bi-CMOS technology. Its architecture supports daisy-chained operation via SERIAL-IN/SERIAL-OUT, enabling synchronized updates across multiple drivers without external microcontroller GPIO overhead.
Operation requires three digital control signals - CLOCK, LATCH, and ENABLE - with level-sensitive latching and active-low output enable. The regulated current is set by a single external resistor (R-EXT) connected between pin 15 and GND, establishing identical per-channel current from 5 mA to 40 mA with <±1% matching between channels at 25°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 3.3 V or 5.0 V - supports dual-voltage system integration; input logic levels track VDD |
| Output Current Range | 5–40 mA per channel - programmable via single R-EXT; enables uniform brightness tuning across 8 LEDs |
| Current Accuracy | ±3% between channels - ensures consistent LED luminance without per-channel trimming |
| Max Output Voltage | 25 V - supports high-Vf LED strings or multi-LED series configurations |
| Serial Data Rate | 25 MHz max - allows rapid refresh of 8-channel data in ≤320 ns, suitable for flicker-free dynamic displays |
| Thermal Shutdown | 150°C - protects against thermal runaway during sustained high-current operation or poor PCB heat sinking |
| Operating Temp | −40°C to +85°C - qualified for industrial indoor display and signage 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 |
|---|---|---|
| GND (Pin 1) | Ground reference | Common return path for all internal circuits and R-EXT biasing; must be low-impedance |
| SERIAL-IN (Pin 2) | Serial data input | Accepts 3.3/5 V CMOS-level data stream; Schmitt trigger ensures noise immunity |
| CLOCK (Pin 3) | Serial clock input | Edge-triggered shift register clock; falling edge clocks data out of SERIAL-OUT |
| LATCH (Pin 4) | Data latch control | Level-sensitive - holds shift register output when LOW; transparent when HIGH |
| OUT0–OUT7 (Pins 5–12) | Constant-current sink outputs | Open-collector, common-anode compatible; each delivers precise current set by R-EXT |
| ENABLE (Pin 13) | Global output disable | Active-HIGH - forces all outputs OFF regardless of latch state; used for blanking or fault shutdown |
| SERIAL-OUT (Pin 14) | Serial data output | Propagates shifted data for cascading; timing aligned to CLOCK falling edge |
| R-EXT (Pin 15) | Current-setting reference | Connects to GND via external resistor; sets identical output current for all 8 channels |
| VDD (Pin 16) | Power supply | 3.3 V or 5.0 V supply; must match logic input voltage level per datasheet Note 2 |
Key Features
| Feature | Design Value |
|---|---|
| Single-resistor current programming | Eliminates per-channel calibration; one 1.2 kΩ resistor sets 15 mA nominal output across all 8 channels |
| Daisy-chain serial interface | Enables expansion to >8 LEDs using multiple TB62777FNG,C8,EL devices without additional MCU pins |
| Schmitt-trigger input logic | Provides ≥0.4 V hysteresis on SERIAL-IN/CLOCK/LATCH/ENABLE - rejects noise in noisy industrial environments |
| Thermal shutdown with auto-recovery | Halts output conduction above 150°C junction temperature; resumes operation after cooldown - prevents permanent damage |
| Power-on reset (POR) | Ensures known initial state (all outputs OFF) at power-up - avoids unintended LED turn-on during boot |
Applications
| LED Panel Displays | Architectural Lighting Controls |
|---|---|
Use Scenario: Driving 8-segment alphanumeric modules or dot-matrix panels in point-of-sale terminals and industrial HMIs. IC Role / Device Role / Timing Role: Constant-current sink for common-anode LED segments; receives serialized display data via microcontroller SPI interface. Use Value: Eliminates discrete current-limiting resistors per segment, reducing BOM count and PCB area while ensuring uniform brightness across all segments. | Use Scenario: Controlling individual zones in linear LED strips for retail shelf lighting or museum accent lighting. IC Role / Device Role / Timing Role: Zone-level current regulator in distributed lighting nodes; enabled/disabled via global ENABLE signal for scene transitions. Use Value: Enables precise per-zone dimming without PWM flicker by maintaining analog current regulation up to 40 mA per zone. |
| Automotive Interior Indicators | Industrial Status Annunciators |
Use Scenario: Illuminating dashboard warning icons (e.g., seatbelt, door-open, oil-pressure) in non-safety-critical vehicle cabins. IC Role / Device Role / Timing Role: LED driver with thermal protection and wide-input compatibility; interfaces to 3.3 V automotive microcontrollers. Use Value: Maintains stable LED current despite battery voltage fluctuations (9–16 V) via regulated 3.3 V/5 V supply rail - ensures consistent icon visibility. | Use Scenario: Powering status LEDs on PLC I/O modules, motor drives, and network switches in factory automation cabinets. IC Role / Device Role / Timing Role: Fault-tolerant indicator driver with POR and TSD; driven by isolated digital outputs from control logic. Use Value: Prevents false illumination during power transients and shuts down safely under overheating - improves system reliability in enclosed enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar constant-current LED driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TB62778FNG,C8,EL | Same pinout and function; higher max output voltage (30 V vs. 25 V); identical current range and accuracy | Better suited for longer LED strings requiring >25 V compliance | Select when Vf_total exceeds 25 V; otherwise TB62777FNG,C8,EL is cost-optimized |
| AL8863SP-13 | Switch-mode buck LED driver; requires inductor; supports 1 A output; no serial interface | Designed for high-power single-string LED loads, not multi-channel addressable control | Choose for efficiency-critical high-current single-LED applications; not a functional substitute for 8-channel serial control |
Compared with TB62777FNG,C8,EL, TB62778FNG,C8,EL offers extended voltage headroom for demanding LED stacks, while AL8863SP-13 targets fundamentally different use cases - high-efficiency DC-DC conversion versus precision multi-channel current sinking with digital control.
Availability
TB62777FNG,C8,EL is available at Aetrix Electronics and suitable for LED panel displays, architectural lighting controls, automotive interior indicators, and industrial status annunciators requiring stable component supply, long-term manufacturability, and RoHS-compliant packaging.
Supply support for TB62777FNG,C8,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 semiconductor solutions for consumer, industrial, and automotive markets, with leadership in power management, motor control, and LED driver ICs.
The TB62777FNG,C8,EL belongs to Toshiba's Bi-CMOS constant-current LED driver family, engineered specifically for cost-sensitive, space-constrained LED display and signage applications requiring accurate current matching and serial expandability.
FAQ
What is the recommended external resistor value to set 20 mA output current per channel on TB62777FNG,C8,EL?
The TB62777FNG,C8,EL uses the formula IOUT = 1.13 V / REXT × 16. For 20 mA per channel, solve REXT = (1.13 V × 16) / 0.02 A = 904 Ω. A standard 910 Ω ±1% resistor yields 19.9 mA typical output. This value is confirmed in the "Output Current vs. External Resistor" graph on page 12 of the TB62777FNG,C8,EL datasheet.
Can TB62777FNG,C8,EL drive common-cathode LED configurations?
No, the TB62777FNG,C8,EL is explicitly designed for common-anode LED connections, as stated in its Features section. Its OUT0–OUT7 pins are open-collector constant-current sinks - they source no current and require the LED anodes to be tied to a positive supply. Attempting to use it with common-cathode LEDs would prevent proper current regulation and may cause malfunction.
Does TB62777FNG,C8,EL support PWM dimming, or is brightness controlled only via current setting?
The TB62777FNG,C8,EL does not integrate PWM dimming circuitry. Brightness is controlled solely by adjusting the constant output current via R-EXT or by externally toggling the ENABLE pin at low frequency. For high-frequency PWM, the ENABLE pin can be driven with a microcontroller-generated signal - but this is external to the TB62777FNG,C8,EL and relies on its fast enable/disable response (≤300 ns propagation delay).
What is the maximum allowable duty cycle for continuous 40 mA operation on TB62777FNG,C8,EL at 85°C ambient?
Per the "Output Current vs. Derating" graph (page 12), at Ta = 85°C, the TB62777FNG,C8,EL's maximum continuous output current is derated to ~25 mA per channel. To sustain 40 mA, the duty cycle must be limited - the graph shows that at 40 mA, the safe duty cycle is ≤65% at 85°C. Exceeding this risks thermal shutdown activation due to junction temperature exceeding 150°C.
Is TB62777FNG,C8,EL pin-compatible with earlier Toshiba LED drivers like TB62705FNG?
No, TB62777FNG,C8,EL is not pin-compatible with TB62705FNG. The TB62705FNG uses a 24-pin SOP package and implements a different control architecture (parallel data input). TB62777FNG,C8,EL uses a 16-pin SSOP package with serial-in/serial-out interface and distinct pin assignments - verified by comparing Pin Assignment diagrams in both respective datasheets.
TB62777FNG,C8,EL Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Toshiba Semiconductor and Storage
- Series:
- -
- Package/Case:
- 16-LSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- 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:
- -
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-SSOP
TB62777FNG,C8,EL FAQ
1.How can I place an order for TB62777FNG,C8,EL through Aetrix?
Please submit a Request for Quotation (RFQ) for TB62777FNG,C8,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 TB62777FNG,C8,EL reliable?
The price and inventory of TB62777FNG,C8,EL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TB62777FNG,C8,EL is usually 5 days.
3.What payment methods are accepted for TB62777FNG,C8,EL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TB62777FNG,C8,EL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TB62777FNG,C8,EL?
TB62777FNG,C8,EL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TB62777FNG,C8,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 TB62777FNG,C8,EL?
For technical support, including TB62777FNG,C8,EL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TB62777FNG,C8,EL requirements.
6.How does Aetrix verify that TB62777FNG,C8,EL is sourced from the original manufacturer or authorized distributors?
All TB62777FNG,C8,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 TB62777FNG,C8,EL meets industry standards.
7.What is the process for return or replacement of TB62777FNG,C8,EL?
All TB62777FNG,C8,EL units undergo pre-shipment inspection (PSI). If there is an issue with TB62777FNG,C8,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 TB62777FNG,C8,EL part is unused and in its original packaging.
Return procedure for TB62777FNG,C8,EL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TB62777FNG,C8,EL Tags
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BCR402RE6327HTSA1
Infineon Technologies
-
BCR430UXTSA2
Infineon Technologies
-
BCR420UE6433HTMA1
Infineon Technologies
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BCR420UE6327HTSA1
Infineon Technologies
-
BCR421UE6327HTSA1
Infineon Technologies
-
LYT1604D-TL
Power Integrations
-
HV9910CLG-G
Microchip Technology
-
CL2N8-G
Microchip Technology
-
BCR420UW6-7
Diodes Incorporated
-
BCR421UW6-7
Diodes Incorporated
-
BCR420UFD-7
Diodes Incorporated
-
BCR421UFD-7
Diodes Incorporated
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