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Toshiba Semiconductor and Storage TB62D901FNG,EL
- Part No.:
- TB62D901FNG,EL
- Manufacturer:
- Toshiba Semiconductor and Storage
- Category:
- LED Drivers
- Package:
- 16-LSSOP (0.173", 4.40mm Width)
- Datasheet:
-
TB62D901FNG,EL.pdf
- Description:
- AC/DC OFFLINE LED LIGHTING PB-FR
- Quantity:
- Payment:
- Shipping:
Inventory:2,000
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Product details
Overview
TB62D901FNG from Toshiba is a constant-current AC/DC step-down LED driver IC designed for off-line LED lighting systems. It operates from 12 V to 30 V input, supports automatic OFF-time adjustment, delivers ≥90% efficiency with recommended components, and integrates thermal shutdown, over-current, over-voltage, under-voltage lockout, and ISEN1 open detection - enabling stable current regulation in LED streetlights and commercial downlights.
For engineers reviewing the TB62D901FNG datasheet, TB62D901FNG pinout, TB62D901FNG application, or TB62D901FNG equivalent, key selection considerations include its triple operation mode (fixed OFF-time, automatic OFF-time, critical conduction), dual dimming support (linear via LD pin, PWM via PWMD), and integrated protection functions requiring no external comparators or timers.
Technical Context
The TB62D901FNG implements a current-mode controller with three selectable switching modes determined by MS and VSEN pin configurations: fixed OFF-time (4 μs typical), automatic OFF-time (VSEN feedback-driven), and critical conduction mode (zero-current detection on VSEN). Each mode directly controls gate drive timing for an external power MOSFET via the GATE output.
It features dual current-sensing paths (ISEN1 for peak LED current control, ISEN2 for ground-side sensing), internal LDO-regulated VREG (5.0 V ±0.1 V), and independent analog inputs for linear dimming (LD), ripple control (RC), and PWM enable (PWMD), all referenced to PGND or GND with defined voltage thresholds and leakage limits.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 12 V to 30 V - powers IC directly from rectified AC line via auxiliary winding; UVLO activates below 8.5 V (typ.) and releases above 11 V (typ.) |
| Switching Frequency | Up to 500 kHz - adjustable via RC pin; enables compact magnetics and EMI optimization in high-density LED drivers |
| LED Current Control | Peak current set by LD pin voltage (0.2–3.8 V) → VPEAK = VLD/1.5 (typ.) - provides precise linear dimming without external DAC |
| Efficiency | ≥90% - achieved with recommended external components in step-down AC/DC topology; reduces thermal load in enclosed fixtures |
| Operating Temperature | −40 °C to +105 °C - supports outdoor and industrial LED lighting environments without derating |
| GATE Drive Strength | Sink resistance 2.5 Ω (typ.), source resistance 5 Ω (typ.) - drives standard 1.2 Ω MOSFETs (e.g., TK5P53D) with <30 ns rise/fall times into 1 nF load |
| Protection Functions | Thermal shutdown (140 °C typ.), OCP (four-cycle latch), OVP (35 V typ.), UVLO (8.5 V typ.), ISEN1 open detection - eliminates need for discrete fault monitoring circuitry |
Pinout & Package
Package: SSOP16-P-225-0.65B (16-pin shrink small outline package, 0.65 mm pitch, 5.0 × 6.4 mm body, 0.07 g typical weight).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC | Power supply input | Accepts 12–30 V DC; powers internal circuits and gate driver; monitored for UVLO/OVP |
| PGND | Power ground | High-current return path for GATE driver; separate from signal GND to minimize noise coupling |
| ISEN1 | LED peak current sense input | Connects to low-side current-sense resistor; sets LED current via internal comparator against VPEAK |
| VSEN | Secondary-side feedback input | Determines OFF time in automatic/critical modes; requires 0.5–3.0 V or 4.5–VREG range for stable operation |
| MS | Mode select input | GND = fixed/critical mode; VREG = critical mode; configures control architecture without external logic |
| PWMD | PWM dimming input | "H" = LED on, "L" = LED off; TTL-compatible (0–0.4 V low, 1.5–VREG high) |
| LD | Linear dimming input | Analog voltage (0.2–3.8 V) sets VPEAK = VLD/1.5 (typ.) for proportional LED current scaling |
| EN | Enable input | "H" = active, "L" = standby (0.8 mA max); disables gate drive and most internal blocks while retaining VREG/UVLO |
| GATE | MOSFET gate driver output | Drives external N-channel MOSFET; output swings rail-to-rail (0 V to VCC) with 5 Ω source / 2.5 Ω sink impedance |
| ISEN2 | Current-sense reference terminal | Ground connection point for ISEN1 sensing resistor; ensures accurate Kelvin sensing of LED current path |
Key Features
| Feature | Design Value |
|---|---|
| Triple Operation Mode Selection | Fixed OFF-time (4 μs typ.), automatic OFF-time (VSEN-adjusted), and critical conduction mode - selectable via MS/VSEN pins without firmware or external timing components |
| Integrated Protection Suite | Single-chip implementation of TSD, OCP (4-cycle latch), OVP, UVLO, and ISEN1 open detection - eliminates discrete protection ICs and reduces BOM count |
| Multi-Dimming Capability | Simultaneous support for PWM (PWMD), linear (LD), and ripple (RC) dimming - enables flexible brightness control across residential, commercial, and smart lighting systems |
| Internal Regulator Output | VREG = 5.0 V ±0.1 V at up to 2 mA - powers external bias circuits (e.g., optocoupler, feedback divider) without auxiliary LDO |
| Low-Standby Power | 0.8 mA max ICC(OFF) in EN=L state - meets Energy Star and IEC 62301 standby power requirements for LED drivers |
Applications
| Street Lighting | Commercial Downlights |
|---|---|
Use Scenario: Outdoor LED luminaires powered directly from 100–240 VAC mains with wide ambient temperature variation (−40 °C to +50 °C). IC Role / Device Role / Timing Role: Primary constant-current controller managing buck-derived LED string current; regulates OFF time dynamically to maintain ±3% current stability despite input voltage sag and LED forward voltage drift. Use Value: Eliminates need for secondary-side feedback optocouplers and TL431 shunt regulators, reducing system cost and improving long-term reliability in sealed enclosures. | Use Scenario: Recessed ceiling fixtures in office buildings requiring smooth 0–100% dimming and compliance with DALI-2 or 0–10 V control interfaces. IC Role / Device Role / Timing Role: Core LED current regulator interfacing with external PWM generator or analog dimmer; LD pin accepts 0–10 V scaled signal for linear dimming, while PWMD accepts digital control pulses. Use Value: Achieves <1% LED current ripple in critical mode, minimizing visible flicker and meeting IEEE 1789-2015 low-risk flicker guidelines for indoor environments. |
| Industrial High-Bay Lighting | LED Retrofit Lamps |
Use Scenario: Warehouse high-bay fixtures operating 24/7 under high ambient temperatures (>60 °C junction), requiring robust thermal management and fault resilience. IC Role / Device Role / Timing Role: Constant-current driver with integrated thermal shutdown (140 °C trip) and automatic recovery (20 °C hysteresis); maintains LED output until safe thermal margin is restored. Use Value: Prevents catastrophic failure during sustained overtemperature events; allows graceful shutdown and self-recovery without manual reset or external watchdog circuitry. | Use Scenario: A19 or PAR30 screw-base LED lamps replacing incandescent bulbs, constrained by volume, thermal mass, and EMI limits. IC Role / Device Role / Timing Role: Compact AC/DC step-down controller using fixed OFF-time mode with minimal external components (no transformer auxiliary winding required in some designs). Use Value: Enables full-feature LED driver functionality in <15 mm height form factor; achieves >90% efficiency with only 16-pin SSOP footprint and <0.1 g IC weight. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LED driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MP4007GQ-Z | Fixed-frequency current-mode controller (65 kHz), no critical mode; requires external VREF and OVP circuitry; lower integration density | Lacks automatic OFF-time adjustment and integrated ISEN open detection; suited for simpler, cost-sensitive designs with stable input | Choose MP4007GQ-Z when board space permits discrete protection and thermal monitoring, and input voltage variation is limited. |
| BD7880FS-E2 | Single-stage PFC + constant-current controller; includes built-in 650 V MOSFET; higher integration but fixed 500 kHz frequency | Designed for single-stage AC/DC conversion with power factor correction; not drop-in compatible due to different pinout and topology | Choose BD7880FS-E2 when PFC compliance is mandatory and system-level efficiency >88% is required without external boost stage. |
Compared with MP4007GQ-Z and BD7880FS-E2, the TB62D901FNG uniquely combines triple-mode operation, integrated ISEN open detection, and 0.8 mA standby current in a 16-pin SSOP - offering superior current regulation stability across variable line and load conditions without increasing component count.
Availability
TB62D901FNG is available at Aetrix Electronics and suitable for street lighting, commercial downlights, industrial high-bay fixtures, and LED retrofit lamps requiring stable component supply, long-lifecycle support, and consistent parametric performance across production batches.
Supply support for TB62D901FNG 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-reliability semiconductor solutions for power management, motor control, and lighting applications, with decades of expertise in BiCD process technology and automotive-grade quality standards.
The TB62D901FNG belongs to Toshiba's AC/DC LED driver IC product line, engineered specifically for non-isolated step-down LED lighting systems where high efficiency, multi-mode adaptability, and comprehensive protection are critical in cost-sensitive, thermally constrained environments.
FAQ
What is the maximum switching frequency supported by the TB62D901FNG?
The TB62D901FNG supports a maximum switching frequency of 500 kHz, adjustable via the RC pin voltage. This upper limit enables use with small, high-frequency inductors and capacitors, reducing solution size and improving dynamic response in LED current regulation. The actual operating frequency depends on external component values and selected mode (fixed, automatic, or critical), but never exceeds 500 kHz under any condition specified in the datasheet.
How does the TB62D901FNG implement thermal protection?
The TB62D901FNG incorporates a thermal shutdown (TSD) function that triggers at 140 °C (typical) internal junction temperature. When activated, it forces the GATE output to 0 V and halts switching. Recovery occurs automatically when the die temperature falls by at least 20 °C (typical hysteresis), restoring normal operation without external intervention. This behavior is fully integrated - no external thermistor or comparator is needed for basic overtemperature protection in the TB62D901FNG.
Can the TB62D901FNG operate without an auxiliary winding for VCC supply?
Yes - the TB62D901FNG supports startup from the AC line via RSTA/CSTA, allowing initial VCC charging before auxiliary winding voltage becomes available. Once the external MOSFET begins switching, VCC is sustained by the transformer auxiliary winding. This dual-supply architecture eliminates dependency on auxiliary winding design during startup, simplifying transformer layout and improving reliability in low-power or wide-input-range LED drivers using the TB62D901FNG.
What are the valid voltage ranges for the LD and RC pins on the TB62D901FNG?
The LD pin accepts 0.2 V to 3.8 V for linear dimming (VPEAK = VLD/1.5 typ.), and the RC pin accepts 1.0 V to 4.0 V for ripple dimming control. Voltages outside these ranges may cause undefined behavior: LD < 0.2 V or > 3.8 V invalidates peak current setting; RC < 1.0 V or > 4.0 V prevents accurate OFF-time adjustment. Both pins tolerate up to 6.0 V absolute maximum, but functional operation is guaranteed only within the specified dimming ranges for the TB62D901FNG.
Does the TB62D901FNG support both isolated and non-isolated LED driver topologies?
The TB62D901FNG is designed for non-isolated step-down (buck-derived) AC/DC LED drivers, as confirmed by its VSEN and ISEN2 pin functions and application diagrams. It does not support isolated flyback or forward topologies requiring primary-side regulation with optocoupler feedback. Its architecture assumes direct connection to the secondary-side LED string and relies on transformer auxiliary winding for VCC - making it ideal for cost-effective, compact non-isolated lighting systems using the TB62D901FNG.
TB62D901FNG,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:
- AC DC Offline Switcher
- Topology:
- Step-Down (Buck)
- Internal Switch(s):
- No
- Number of Outputs:
- 1
- Voltage - Supply (Min):
- 12V
- Voltage - Supply (Max):
- 30V
- Voltage - Output:
- -
- Current - Output / Channel:
- -
- Frequency:
- 500kHz
- Dimming:
- PWM
- Applications:
- LED Lighting
- Operating Temperature:
- -40°C ~ 105°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-SSOP
TB62D901FNG,EL FAQ
1.How can I place an order for TB62D901FNG,EL through Aetrix?
Please submit a Request for Quotation (RFQ) for TB62D901FNG,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 TB62D901FNG,EL reliable?
The price and inventory of TB62D901FNG,EL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TB62D901FNG,EL is usually 5 days.
3.What payment methods are accepted for TB62D901FNG,EL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TB62D901FNG,EL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TB62D901FNG,EL?
TB62D901FNG,EL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TB62D901FNG,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 TB62D901FNG,EL?
For technical support, including TB62D901FNG,EL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TB62D901FNG,EL requirements.
6.How does Aetrix verify that TB62D901FNG,EL is sourced from the original manufacturer or authorized distributors?
All TB62D901FNG,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 TB62D901FNG,EL meets industry standards.
7.What is the process for return or replacement of TB62D901FNG,EL?
All TB62D901FNG,EL units undergo pre-shipment inspection (PSI). If there is an issue with TB62D901FNG,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 TB62D901FNG,EL part is unused and in its original packaging.
Return procedure for TB62D901FNG,EL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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