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LED Drivers

Non-isolated AC/DC step-down converter TB62D901FNG


  • Suitable for various kinds of applications
    (1)Can be used for various applications with constant-current control
    Supports Frequency self-adjustment systems, critical-conduction-mode (CRM) systems, and constant off-time systems
    (2)Stable LED current
    Frequency self-adjustment systems eliminates the need to change the constants of external parts according to the number of LEDs and the input voltage.
  • Reduces the external part count
    Constant off-time systems
  • Supports various dimming control methods
    PWM dimming, linear dimming
  • Protection features
    Thermal shutdown, overcurrent detection, overvoltage detection, undervoltage lockout, ISEN terminal open detection
  • The IC standby function reduces current consumption when LEDs are off.
    Setting the EN signal Low disables IC operation. Standby current consumption: 0.8 mA (max)


System Circuit Diagram


Frequency self-adjustment system A frequency self-adjustment system delivers stable LED current, regardless of the number of driven LEDs.

Offline isolated flyback LED controller TC62D902FG


  • Isolated flyback LED controller
  • Triac dimmable
  • Built-in PFC function
    1 converter PFC
  • Photocoupler-less
    Requires fewer external components and provides improved current accuracy
  • Valley switch
    Improves efficiency and reduces EMI noise
  • Protection features
    Undervoltage lockout overcurrent detection, VIN overvoltage detection, sense resistor short detection at startup, sense wiring open detection, overtemperature detection, output LED open/short detection
  • Small package

System Circuit Diagram


PFC control for Critical-Conduction Mode (CRM) TB6819AFG

Designed for small- to medium-screen LCD, general and lighting power supply board applications
  • Recommended for a power supply of less than 200 W


  • Maximum rated supply voltage
    25 V
  • Operating voltage range
    10 V (min) to 25 V (max)
  • Operating current
    4 mA (typ.)
  • Industry-standard pin assignment
  • Output voltage control under light-load conditions
  • Various protection circuits
  • DC Input overvoltage protection Limited to 25 V
  • PFC Output overvoltage protection (OVP-2)
  • Undervoltage lockout (UVLO)
  • Feedback-loop open detection (FOD)
  • Thermal shutdown (TSD)
  • Brownout protection (BOP)
    The TB6819AFG can be put in standby mode by lowering the voltage at the MULT pin to save system standby power.
  • Package
    SOP8 (1.27-mm lead pitch)

System Circuit Diagram

When the AC input voltage is lower than a threshold, the TB6819AFG enters standby mode, reducing standby power consumption.


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·Before creating and producing designs and using, customers must also refer to and comply with the latest versions of all relevant TOSHIBA information and the instructions for the application that Product will be used with or for.